{"id":819765,"date":"2026-06-18T11:18:59","date_gmt":"2026-06-18T09:18:59","guid":{"rendered":"https:\/\/www.nidaplast.com\/environnement\/remblai-allege-culee-de-pont\/"},"modified":"2026-06-19T12:01:25","modified_gmt":"2026-06-19T10:01:25","slug":"lightweight-fill-bridge-abutment","status":"publish","type":"solutions","link":"https:\/\/www.nidaplast.com\/en\/environnement\/lightweight-fill-bridge-abutment\/","title":{"rendered":"Lightweight Fill for Bridge Abutments: Reducing Lateral Earth Pressure and Differential Settlement"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"819765\" class=\"elementor elementor-819765 elementor-812750\" data-elementor-post-type=\"solutions\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2180f92b e-flex e-con-boxed e-con e-parent\" data-id=\"2180f92b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-2358b33d e-con-full e-flex e-con e-child\" data-id=\"2358b33d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6f9a9281 elementor-widget elementor-widget-shortcode\" data-id=\"6f9a9281\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><nav aria-label=\"breadcrumbs\" class=\"rank-math-breadcrumb\"><p><span class=\"last\">Nidaplast<\/span><\/p><\/nav><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6cc9bc6f e-flex e-con-boxed e-con e-parent\" data-id=\"6cc9bc6f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-72788998 e-con-full e-flex e-con e-child\" data-id=\"72788998\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-30f686d5 e-con-full e-flex e-con e-child\" data-id=\"30f686d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4ffde885 elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"4ffde885\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Lightweight Fill for Bridge Abutments: Reducing Lateral Earth Pressure and Differential Settlement<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40a5752c elementor-widget elementor-widget-heading\" data-id=\"40a5752c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">No differential settlement. No buoyancy risk. No compromise.<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4631bf25 elementor-widget elementor-widget-text-editor\" data-id=\"4631bf25\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Building approach embankments against a <strong>bridge abutment<\/strong> creates two critical structural constraints: <strong>lateral earth pressure<\/strong> on the foundations and <strong>differential settlement<\/strong> at the embankment-to-structure interface.<\/p><p>The Nidaplast RA honeycomb polypropylene lightweight fill (SAUL \u2014 ultra-lightweight cellular structure) addresses both issues by replacing conventional fill with 95%-void PP honeycomb blocks, with a dry unit weight of 35 to 45 kg\/m\u00b3 \u2014 compared to 1,700 to 1,900 kg\/m\u00b3 for standard granular fill.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78c6c999 elementor-tablet-align-justify elementor-widget elementor-widget-button\" data-id=\"78c6c999\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/en\/case-studies\/lightweight-fill-on-civil-engineering-structures\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">View our projects<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4fbf089f elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"4fbf089f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"465\" height=\"467\" src=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/06\/remblai-allege-culee-pont.jpg\" class=\"attachment-large size-large wp-image-814167\" alt=\"Remblai all\u00e9g\u00e9 Nidaplast RA pour cul\u00e9e de pont \u2014 chantier de viaduc en cours de construction\" srcset=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/06\/remblai-allege-culee-pont.jpg 465w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/06\/remblai-allege-culee-pont-300x300.jpg 300w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/06\/remblai-allege-culee-pont-150x150.jpg 150w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/06\/remblai-allege-culee-pont-100x100.jpg 100w\" sizes=\"(max-width: 465px) 100vw, 465px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5ec42a24 e-flex e-con-boxed e-con e-parent\" data-id=\"5ec42a24\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-728bb9f7 elementor-widget elementor-widget-heading\" data-id=\"728bb9f7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why Conventional Backfill Creates Problems at Bridge Abutments<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-63f7427 elementor-widget elementor-widget-text-editor\" data-id=\"63f7427\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Granular or cohesive fill placed against a bridge abutment generates lateral earth pressure proportional to the material&#8217;s unit weight, its height, and the coefficient of earth pressure at rest (Ka).<\/p><p>The greater the fill height, the higher the horizontal forces applied to the abutment foundations.<\/p><p>On top of this lateral pressure, differential settlement develops at the top of the approach embankment \u2014 a recurring source of structural damage including road surface deformation and cracking near the deck end.<\/p><p>This application has been validated in French national road construction guidelines and is supported by documented installations since 1986 \u2014 including T0 and T3 traffic-class roads and motorway projects.<\/p><p>The French LCPC Technical Guide (<em>Use of Ultra-Lightweight Cellular Structures in Road Embankments, 1992<\/em>) explicitly lists among the applications of SAUL in road construction: limiting &#8220;<em>horizontal ground deformations and forces on bridge abutment foundations during approach embankment construction (negative friction and horizontal forces<\/em>)&#8221;.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6abefd7 e-flex e-con-boxed e-con e-parent\" data-id=\"6abefd7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f9b1c6e elementor-widget elementor-widget-heading\" data-id=\"f9b1c6e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How Nidaplast RA Lightweight Fill Works at Bridge Abutments<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dbc0035 elementor-widget elementor-widget-text-editor\" data-id=\"dbc0035\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The approach consists of replacing all or part of the embankment body with polypropylene honeycomb blocks (non-virgin PP, 60% recycled content).<\/p><p>The cellular structure delivers a 95% void ratio, giving the material a dry unit weight of 35 kg\/m\u00b3 (RA400) to 45 kg\/m\u00b3 (RA600) \u2014 approximately <strong>40 to 50 times lighter than conventional fill.<\/strong><\/p><p>The<strong> low density<\/strong> of the material significantly reduces lateral earth pressure on bridge abutments and limits settlement of the ground or deformation of the approach road.<\/p><p>The open-cell structure creates <strong>no buoyancy force in the presence of water<\/strong>, with blocks remaining neutral to changes in the water table level.<\/p><p><em>Source \u2014 Nidaplast 2026 product catalogue: &#8220;Lightweight fill reduces lateral forces that may cause loading on foundations, retaining walls, etc. In the case of a bridge abutment, the use of an ultra-lightweight cellular fill (SAUL) also limits ground settlement and deformation of the carriageway.&#8221;<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-486595e8 e-flex e-con-boxed e-con e-parent\" data-id=\"486595e8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-3e0b273d e-con-full e-flex e-con e-child\" data-id=\"3e0b273d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2bd1c09d elementor-widget elementor-widget-heading\" data-id=\"2bd1c09d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Nidaplast RA Technical Specifications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b3c9b96 elementor-widget elementor-widget-text-editor\" data-id=\"b3c9b96\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Nidaplast RA blocks are available in three compressive resistance grades (RA400, RA500, RA600). The values below are taken from the 2026 product catalogue.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6c6c782c e-con-full e-flex e-con e-child\" data-id=\"6c6c782c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-1076d50 e-con-full enfant e-flex e-con e-child\" data-id=\"1076d50\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-579226eb elementor-widget elementor-widget-heading\" data-id=\"579226eb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Property<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a46085e elementor-widget elementor-widget-heading\" data-id=\"4a46085e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Dry unit weight<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-49858cd8 elementor-widget elementor-widget-heading\" data-id=\"49858cd8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Short-term compressive strength (520 mm block)<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec8d462 elementor-widget elementor-widget-heading\" data-id=\"ec8d462\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Long-term allowable bearing pressure (\u00d72 safety factor, 50 yrs)<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-17ad3996 elementor-widget elementor-widget-heading\" data-id=\"17ad3996\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Max. depth of overlying fill (3 layers)<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aea30a8 elementor-widget elementor-widget-heading\" data-id=\"aea30a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Void ratio<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1baa5cfb e-con-full enfant e-flex e-con e-child\" data-id=\"1baa5cfb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-78c26749 elementor-widget elementor-widget-heading\" data-id=\"78c26749\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Nidaplast RA 400<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69be82f9 elementor-widget elementor-widget-heading\" data-id=\"69be82f9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">35 kg\/m\u00b3<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5fad184a elementor-widget elementor-widget-heading\" data-id=\"5fad184a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">300 kPa<br><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9cb90a8 elementor-widget elementor-widget-heading\" data-id=\"9cb90a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><br>45 kPa<br><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-603f72a8 elementor-widget elementor-widget-heading\" data-id=\"603f72a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/hubs.ly\/Q03PSZ5z0\" target=\"_blank\" rel=\"noopener\"><br>2.30 m<br><\/a><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48865a7 elementor-widget elementor-widget-heading\" data-id=\"48865a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/hubs.ly\/Q03PSZ5z0\" target=\"_blank\" rel=\"noopener\">95%<\/a><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3645981c e-con-full enfant e-flex e-con e-child\" data-id=\"3645981c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-28b6999f elementor-widget elementor-widget-heading\" data-id=\"28b6999f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><span style=\", sans-serif\">Nidaplast RA 500<\/span><span style=\", sans-serif\"><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c26d05c elementor-widget elementor-widget-heading\" data-id=\"2c26d05c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">40 kg\/m\u00b3<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-41b9e8dd elementor-widget elementor-widget-heading\" data-id=\"41b9e8dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><span style=\", sans-serif\">400 kPa<\/span><br><span style=\", sans-serif\"><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d93f1de elementor-widget elementor-widget-heading\" data-id=\"4d93f1de\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><br>65 kPa<br><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1694e150 elementor-widget elementor-widget-heading\" data-id=\"1694e150\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/hubs.ly\/Q03PSZ5z0\" target=\"_blank\" rel=\"noopener\"><br>3.30 m<br><\/a><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b0ff35 elementor-widget elementor-widget-heading\" data-id=\"6b0ff35\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/hubs.ly\/Q03PSZ5z0\" target=\"_blank\" rel=\"noopener\">95%<\/a><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-360066cf e-con-full enfant e-flex e-con e-child\" data-id=\"360066cf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fed62f5 elementor-widget elementor-widget-heading\" data-id=\"fed62f5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><span style=\", sans-serif\">Nidaplast RA 600<\/span><span style=\", sans-serif\"><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-86bae3b elementor-widget elementor-widget-heading\" data-id=\"86bae3b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">45 kg\/m\u00b3<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a923609 elementor-widget elementor-widget-heading\" data-id=\"5a923609\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><span style=\", sans-serif\">500 kPa<\/span><br><span style=\", sans-serif\"><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-49f882b elementor-widget elementor-widget-heading\" data-id=\"49f882b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><br>85 kPa<br><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5bd542c1 elementor-widget elementor-widget-heading\" data-id=\"5bd542c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/hubs.ly\/Q03PSZ5z0\" target=\"_blank\" rel=\"noopener\">4.30 m<br><\/a><\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bf39175 elementor-widget elementor-widget-heading\" data-id=\"bf39175\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/hubs.ly\/Q03PSZ5z0\" target=\"_blank\" rel=\"noopener\">95%<\/a><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b8f075c elementor-widget elementor-widget-text-editor\" data-id=\"b8f075c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Note: the long-term allowable bearing pressure includes a safety factor of 2 applied to the maximum allowable vertical stress extrapolated to 50 years (per CSTB Technical Approval). This is the governing value for permanent service condition design.<\/p><p>Standard block dimensions: 2,400 \u00d7 1,200 \u00d7 520 mm. RA500 panels (40, 60, 100 or 120 mm thick) allow geometric adjustments at the perimeter of the fill mass or at transition zones with the structure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-23c080a elementor-widget elementor-widget-image\" data-id=\"23c080a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"292\" src=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/06\/PRODUIT-NIDAPLAST-REMBLAI-ALLEGE-ALVEOLAIRE-300x292.jpg\" class=\"attachment-medium size-medium wp-image-814189\" alt=\"Bloc alv\u00e9olaire Nidaplast RA en polypropyl\u00e8ne \u2014 remblai all\u00e9g\u00e9 SAUL taux de vide 95 %\" srcset=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/06\/PRODUIT-NIDAPLAST-REMBLAI-ALLEGE-ALVEOLAIRE-300x292.jpg 300w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2026\/06\/PRODUIT-NIDAPLAST-REMBLAI-ALLEGE-ALVEOLAIRE.jpg 480w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6699223 e-flex e-con-boxed e-con e-parent\" data-id=\"6699223\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0a06e80 elementor-widget elementor-widget-heading\" data-id=\"0a06e80\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Key Benefits of Nidaplast RA Lightweight Backfill for Bridge Structures<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-683e5be elementor-widget elementor-widget-heading\" data-id=\"683e5be\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Reduced Lateral Earth Pressure on Abutment Foundations<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fb6028c elementor-widget elementor-widget-text-editor\" data-id=\"fb6028c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The low unit weight of the honeycomb blocks significantly reduces horizontal forces transferred to footings and foundation piles. On geotechnically constrained projects, this allows lighter foundation design or rehabilitation of existing structures without structural strengthening.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cbf7597 elementor-widget elementor-widget-heading\" data-id=\"cbf7597\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Controlled Differential Settlement<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-05f524c elementor-widget elementor-widget-text-editor\" data-id=\"05f524c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Replacing conventional fill with Nidaplast RA blocks reduces loads applied to the foundation soil and improves structural stability by limiting differential deformation between the approach embankment and the pile-founded abutment. This is particularly critical on soft ground or at hard\/soft ground transitions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a9d0e3e elementor-widget elementor-widget-heading\" data-id=\"a9d0e3e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Hydraulically Transparent \u2014 No Buoyancy Risk<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ae6fa45 elementor-widget elementor-widget-text-editor\" data-id=\"ae6fa45\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The open cells allow free water movement through the blocks. In zones subject to water table fluctuations, the lightweight fill generates no buoyancy force. This makes it the preferred EPS geofoam alternative for wet or flood-prone sites, validated in practice on projects including <a href=\"https:\/\/www.nidaplast.com\/en\/case-studies\/toddbrook-dam-spillway-stabilisation-using-lightweight-fill\/\" target=\"_blank\" rel=\"noopener\">Toddbrook Dam (Derbyshire, UK)<\/a>, where the solution was engineered by ARUP.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fabb18c elementor-widget elementor-widget-heading\" data-id=\"fabb18c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Fast Installation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe4bb4f elementor-widget elementor-widget-text-editor\" data-id=\"fe4bb4f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The large block format (2,400 \u00d7 1,200 \u00d7 520 mm) enables high installation rates. Blocks can be cut with a chainsaw or bucket to fit any site geometry: curved slopes, skewed connections at the deck end, transition zones with conventional fill.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54c85f3 elementor-widget elementor-widget-heading\" data-id=\"54c85f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Long-Term Durability<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a34189 elementor-widget elementor-widget-text-editor\" data-id=\"3a34189\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Polypropylene offers excellent resistance to water and most acids, alkalis and salt solutions. The material is impervious to rodents \u2014 unlike EPS-based products. Service life is compatible with the design life of bridge structures.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d392e0f e-flex e-con-boxed e-con e-parent\" data-id=\"d392e0f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4a02e31 elementor-widget elementor-widget-heading\" data-id=\"4a02e31\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Installation of Nidaplast RA Lightweight Fill at Bridge Abutments<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-156c084 elementor-widget elementor-widget-text-editor\" data-id=\"156c084\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Installation follows the Nidaplast Technical Guide (PGMEO) and the LCPC guide:<\/p><ul><li>Excavation to the fill mass geometry, with secured working perimeter.<\/li><li>Geotextile separator placed between the foundation soil and the blocks (tensile strength \u2265 20 kN\/m, static CBR \u2265 3.5 kN). This prevents fines migration into the cellular structure.<\/li><li>Blocks laid in courses to the layout plan, with cross-jointed coursing. Blocks butt-jointed under pavement (gap \u2264 2 cm, per LCPC guide).<\/li><li>For total lightweight fill heights exceeding 6 m: insert a 0.30 m intermediate layer of conventional compacted fill to redistribute stresses.<\/li><li>Conventional compacted fill above the lightweight fill mass: minimum 0.30 m for light construction traffic. The sub-base layer above is designed to the expected traffic loading (unbound granular layer + bituminous base course, per LCPC guidance).<\/li><li>Closing geotextile layer on the top face before placing overlying fill.<\/li><\/ul><p>\u00a0<\/p><p>The width-to-height ratio of the fill mass must be verified at design stage: a width greater than twice the height provides stability without specific calculation. Below this ratio, a dedicated structural note is required.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f4313a elementor-tablet-align-justify elementor-widget elementor-widget-button\" data-id=\"1f4313a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/en\/contact\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contact our technical team<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-634f2c3d e-flex e-con-boxed e-con e-parent\" data-id=\"634f2c3d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-7b23cf8d e-con-full e-flex e-con e-child\" data-id=\"7b23cf8d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-56643bb0 elementor-widget elementor-widget-heading\" data-id=\"56643bb0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently Asked Questions \u2014 Lightweight Fill for Bridge Abutments<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-160ea3a elementor-widget elementor-widget-n-accordion\" data-id=\"160ea3a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;max_items_expended&quot;:&quot;multiple&quot;,&quot;default_state&quot;:&quot;expanded&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-2310\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-2310\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What is the maximum depth of Nidaplast RA lightweight fill against a bridge abutment? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"3\" viewBox=\"0 0 14 3\" fill=\"none\"><path d=\"M1.13672 1.02515H12.4467\" stroke=\"#2A2A2A\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 14 14\" fill=\"none\"><path d=\"M6.78906 1.02515V13.0251\" stroke=\"#2A2A2A\" stroke-width=\"1.33333\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><path d=\"M0.789062 7.02515H12.7891\" stroke=\"#2A2A2A\" stroke-width=\"1.33333\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2310\" class=\"elementor-element elementor-element-2b22f159 e-con-full e-flex e-con e-child\" data-id=\"2b22f159\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2310\" class=\"elementor-element elementor-element-98a72d6 e-flex e-con-boxed e-con e-child\" data-id=\"98a72d6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-21ed9ac elementor-widget elementor-widget-text-editor\" data-id=\"21ed9ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Installed heights can reach 10 m or more (reference: Leuge Viaduct, Brioude). The RA600 grade offers the highest long-term allowable bearing pressure (85 kPa) and supports up to 4.30 m of overlying fill (3 block layers). For total lightweight fill heights exceeding 6 m, an intermediate layer of conventional fill (\u2265 0.30 m) is inserted.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-2311\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-2311\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Does Nidaplast RA lightweight fill perform in the presence of a water table or flooding? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"3\" viewBox=\"0 0 14 3\" fill=\"none\"><path d=\"M1.13672 1.02515H12.4467\" stroke=\"#2A2A2A\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 14 14\" fill=\"none\"><path d=\"M6.78906 1.02515V13.0251\" stroke=\"#2A2A2A\" stroke-width=\"1.33333\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><path d=\"M0.789062 7.02515H12.7891\" stroke=\"#2A2A2A\" stroke-width=\"1.33333\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2311\" class=\"elementor-element elementor-element-47e18b98 e-con-full e-flex e-con e-child\" data-id=\"47e18b98\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2311\" class=\"elementor-element elementor-element-34abb8f e-flex e-con-boxed e-con e-child\" data-id=\"34abb8f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fa360ee elementor-widget elementor-widget-text-editor\" data-id=\"fa360ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Yes. The open cellular structure allows free water movement through the blocks without generating buoyancy forces. This makes it the preferred alternative to EPS geofoam in alluvial zones, valley bottoms and any site subject to seasonal flooding or rising groundwater. The material behaves as a hydraulically transparent fill.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-2312\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-2312\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Can Nidaplast RA be cut and shaped to fit complex abutment geometry? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"3\" viewBox=\"0 0 14 3\" fill=\"none\"><path d=\"M1.13672 1.02515H12.4467\" stroke=\"#2A2A2A\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 14 14\" fill=\"none\"><path d=\"M6.78906 1.02515V13.0251\" stroke=\"#2A2A2A\" stroke-width=\"1.33333\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><path d=\"M0.789062 7.02515H12.7891\" stroke=\"#2A2A2A\" stroke-width=\"1.33333\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2312\" class=\"elementor-element elementor-element-4ef34003 e-con-full e-flex e-con e-child\" data-id=\"4ef34003\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2312\" class=\"elementor-element elementor-element-2b7a3a8 e-flex e-con-boxed e-con e-child\" data-id=\"2b7a3a8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-091a6e9 elementor-widget elementor-widget-text-editor\" data-id=\"091a6e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Yes. Blocks are cut with a chainsaw or excavator bucket at the panel joints. RA500 panels (40 to 120 mm thick) allow fine adjustment at the perimeter. This flexibility is confirmed on all referenced abutment projects including the Leuge Viaduct and the Cotonou bridge.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-2313\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-2313\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> How does Nidaplast RA compare to EPS geofoam for bridge abutment backfill? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"3\" viewBox=\"0 0 14 3\" fill=\"none\"><path d=\"M1.13672 1.02515H12.4467\" stroke=\"#2A2A2A\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 14 14\" fill=\"none\"><path d=\"M6.78906 1.02515V13.0251\" stroke=\"#2A2A2A\" stroke-width=\"1.33333\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><path d=\"M0.789062 7.02515H12.7891\" stroke=\"#2A2A2A\" stroke-width=\"1.33333\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2313\" class=\"elementor-element elementor-element-061293c e-flex e-con-boxed e-con e-child\" data-id=\"061293c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-2313\" class=\"elementor-element elementor-element-21c5a0d e-con-full e-flex e-con e-child\" data-id=\"21c5a0d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a48610a elementor-widget elementor-widget-text-editor\" data-id=\"a48610a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Both materials are lightweight, but differ on two critical points for abutment applications. The wet unit weight of EPS reaches approximately 100 kg\/m\u00b3 when water is absorbed (versus 35\u201345 kg\/m\u00b3 for Nidaplast RA, unchanged in wet conditions). Nidaplast RA has a 95% void ratio \u2014 water flows freely through the open cells \u2014 compared to 5\u20139% for closed-cell EPS, which absorbs and retains water. In the presence of a fluctuating water table, Nidaplast RA maintains its mechanical properties and mass without generating buoyancy forces. It is also impervious to rodents.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<script type=\"application\/ld+json\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the maximum depth of Nidaplast RA lightweight fill against a bridge abutment?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Installed heights can reach 10 m or more (reference: Leuge Viaduct, Brioude). The RA600 grade offers the highest long-term allowable bearing pressure (85 kPa) and supports up to 4.30 m of overlying fill (3 block layers). For total lightweight fill heights exceeding 6 m, an intermediate layer of conventional fill (\\u2265 0.30 m) is inserted.\"}},{\"@type\":\"Question\",\"name\":\"Does Nidaplast RA lightweight fill perform in the presence of a water table or flooding?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The open cellular structure allows free water movement through the blocks without generating buoyancy forces. This makes it the preferred alternative to EPS geofoam in alluvial zones, valley bottoms and any site subject to seasonal flooding or rising groundwater. The material behaves as a hydraulically transparent fill.\"}},{\"@type\":\"Question\",\"name\":\"Can Nidaplast RA be cut and shaped to fit complex abutment geometry?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Blocks are cut with a chainsaw or excavator bucket at the panel joints. RA500 panels (40 to 120 mm thick) allow fine adjustment at the perimeter. This flexibility is confirmed on all referenced abutment projects including the Leuge Viaduct and the Cotonou bridge.\"}},{\"@type\":\"Question\",\"name\":\"How does Nidaplast RA compare to EPS geofoam for bridge abutment backfill?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Both materials are lightweight, but differ on two critical points for abutment applications. The wet unit weight of EPS reaches approximately 100 kg\\\/m\\u00b3 when water is absorbed (versus 35\\u201345 kg\\\/m\\u00b3 for Nidaplast RA, unchanged in wet conditions). Nidaplast RA has a 95% void ratio \\u2014 water flows freely through the open cells \\u2014 compared to 5\\u20139% for closed-cell EPS, which absorbs and retains water. In the presence of a fluctuating water table, Nidaplast RA maintains its mechanical properties and mass without generating buoyancy forces. It is also impervious to rodents.\"}}]}<\/script>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-619662fe e-flex e-con-boxed e-con e-parent\" data-id=\"619662fe\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-614624a4 e-con-full e-flex e-con e-child\" data-id=\"614624a4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-74199753 e-con-full e-flex e-con e-child\" data-id=\"74199753\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-78fe9afa elementor-widget elementor-widget-heading\" data-id=\"78fe9afa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Looking to distribute our products?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c6a932e elementor-widget elementor-widget-text-editor\" data-id=\"5c6a932e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Become a Nidaplast RA distributor \u2014 France&#8217;s reference solution for lightweight and geotechnical fill.<\/p><ul><li>Our teams support you through feasibility studies, block layout planning and project dimensioning.<\/li><li>We offer personalised technical and commercial support, as well as mixed-product orders to suit your needs.<\/li><li>Provide your clients with durable lightweight fill solutions, compatible with wetlands and the most demanding geotechnical constraints.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-35a7a86e elementor-tablet-align-justify elementor-widget elementor-widget-button\" data-id=\"35a7a86e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/en\/contact\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Become a distributor <\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78a5b7ac elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"78a5b7ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"400\" height=\"565\" src=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2025\/10\/Illustration-solution-remblai-allege.webp\" class=\"attachment-large size-large wp-image-4842\" alt=\"conditionnement solution remblai all\u00e9g\u00e9 alv\u00e9olaire\" srcset=\"https:\/\/www.nidaplast.com\/wp-content\/uploads\/2025\/10\/Illustration-solution-remblai-allege.webp 400w, https:\/\/www.nidaplast.com\/wp-content\/uploads\/2025\/10\/Illustration-solution-remblai-allege-212x300.webp 212w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7b45013f e-flex e-con-boxed e-con e-parent\" data-id=\"7b45013f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-13be6f85 e-con-full e-flex e-con e-child\" data-id=\"13be6f85\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-526cbd20 e-con-full e-grid e-con e-child\" 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45.376H5V68.7093C5 70.4774 5.70238 72.1731 6.95262 73.4234C8.20286 74.6736 9.89856 75.376 11.6667 75.376H35V66.7676Z\" fill=\"#2A2A2A\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-56f153d6 elementor-widget elementor-widget-heading\" data-id=\"56f153d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Proven technical solutions<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44e2e258 elementor-widget elementor-widget-text-editor\" data-id=\"44e2e258\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Our products are developed to meet real on-site requirements: performance, reliability and durability are at the core of every solution.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div 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43.246 40.0613 43.0632 42.0304 42.1104C42.8136 41.7405 43.6691 41.5492 44.5352 41.5504C45.6265 41.5428 46.697 41.8482 47.62 42.4304C49.4872 43.6232 51.668 44.0992 53.76 43.7696C54.0697 43.7212 54.3826 43.6969 54.696 43.6968C57.5648 43.6968 59.896 45.7144 59.896 48.1944C59.896 48.2888 59.896 48.3848 59.8856 48.4784C59.7901 49.6466 60.0535 50.8161 60.6408 51.8304C60.9291 52.314 61.1113 52.8534 61.1752 53.4128Z\" fill=\"#2A2A2A\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-285a809b elementor-widget elementor-widget-heading\" data-id=\"285a809b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Committed to a reduced environmental footprint<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-63cbbad7 elementor-widget elementor-widget-text-editor\" data-id=\"63cbbad7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>At Nidaplast, we design recyclable products incorporating recycled materials, produced through a controlled industrial process with a low carbon footprint.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5142b1e7 e-con-full e-flex e-con e-child\" data-id=\"5142b1e7\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6580497e elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"6580497e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"80\" height=\"80\" viewBox=\"0 0 80 80\" 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30.5308C47.1844 26.563 43.9678 23.3464 40 23.3464ZM32.1856 51.9581H52.2661C53.2887 51.9581 54.0306 51.0069 53.7816 50.015C52.2322 43.8458 46.6498 39.2777 40 39.2777C34.3644 39.2777 29.4961 42.5587 27.1988 47.3145C29.1536 48.5175 30.85 50.0992 32.1856 51.9581Z\" fill=\"#2A2A2A\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-447fd0b elementor-widget elementor-widget-heading\" data-id=\"447fd0b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Tailored technical support<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7b409535 elementor-widget elementor-widget-text-editor\" data-id=\"7b409535\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Whether you are a technical expert, design engineer or commercial contact, our teams support professionals throughout their projects \u2014 in France and internationally.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c50e5dd e-con-full e-flex e-con e-child\" data-id=\"c50e5dd\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b344ba9 elementor-widget elementor-widget-text-editor\" data-id=\"b344ba9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Nidaplast RA is a lightweight cellular fill (SAUL \u2014 Ultra-Lightweight Cellular Structure) made from polypropylene (PP, 60% recycled content), manufactured by Nidaplast (Hauts-de-France, France). It is used as bridge abutment backfill (lightweight fill bridge abutment) to reduce lateral earth pressure on foundations and limit differential settlement at the embankment-to-structure interface.<\/p><p>Technical specifications (2026 catalogue): dry unit weight 35 to 45 kg\/m\u00b3 (RA400\/500\/600), void ratio 95%, short-term compressive strength 300 to 500 kPa (520 mm block), long-term allowable bearing pressure 45 to 85 kPa (safety factor \u00d72, 50-year design life), maximum depth of overlying fill 2.30 to 4.30 m depending on grade. Standard block dimensions: 2,400 \u00d7 1,200 \u00d7 520 mm.<\/p><p>The material is hydraulically transparent (no buoyancy force), impervious to rodents, and chemically resistant to acids and alkalis. Installation rate: approximately 100 m\u00b3\/man\/day. Blocks are cuttable with a chainsaw for any site geometry.<\/p><p>Proven project references for bridge abutment lightweight fill: Leuge Viaduct, Brioude (France, 43), 6,000 m\u00b3, 10 m height; Bridge abutment, Cotonou (Benin), 1,040 m\u00b3; Viaduc de la Falaise, Saint-Andr\u00e9-de-Cubzac, A10 motorway (France); Pont du Larivot, Cayenne (French Guiana). Applications documented since 1986. Compliant with LCPC Technical Guide (Use of Ultra-Lightweight Cellular Structures in Road Embankments, 1992). 100% French manufacturing. Website: www.nidaplast.com<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>No differential settlement. No buoyancy risk. No compromise. Building approach embankments against a bridge abutment creates two critical structural constraints: lateral earth pressure on the foundations and differential settlement at the embankment-to-structure interface. The Nidaplast RA honeycomb polypropylene lightweight fill (SAUL \u2014 ultra-lightweight cellular structure) addresses both issues by replacing conventional fill with 95%-void PP [&hellip;]<\/p>\n","protected":false},"featured_media":4832,"template":"","meta":{"_acf_changed":false},"univers":[],"famille":[457],"class_list":["post-819765","solutions","type-solutions","status-publish","has-post-thumbnail","hentry","famille-lightweight-backfill"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/solutions\/819765","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/solutions"}],"about":[{"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/types\/solutions"}],"version-history":[{"count":9,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/solutions\/819765\/revisions"}],"predecessor-version":[{"id":820680,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/solutions\/819765\/revisions\/820680"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/media\/4832"}],"wp:attachment":[{"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/media?parent=819765"}],"wp:term":[{"taxonomy":"univers","embeddable":true,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/univers?post=819765"},{"taxonomy":"famille","embeddable":true,"href":"https:\/\/www.nidaplast.com\/en\/wp-json\/wp\/v2\/famille?post=819765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}