Project Summary/Scope:

Project Summary/Scope:

<p><p><h2>Commentary</h2>Payment for Expanded PolyStyrene (EPS) geofoam typically consists of a pay item measured by the cubic yard (CY).

<p><p><figure id='attachment_2606' style='max-width:496px' class='caption aligncenter'><img class="wp-image-2606 size-full" src="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/…; alt="Photograph showing EPS Geofoam Blocks Being Placed." width="496" height="308" /><figcaption class='caption-text'> EPS Geofoam Blocks Being Placed (Phtograph from Elias et a

<p><p><strong>References:<br></strong><em>Schaefer et al. (2016)<br>Stark et al. (2004b)</em></p><p><strong>Method Summary</strong></p><p>Schaefer et al. (2016) and Stark et al. (2004b) provide recommendations for material testing of the various lightweight fill materials.

Current FHWA Reference(s):
Stark et al. (2004a, b)Supporting Reference(s):
Zornberg et al. (2005)

<p><p><strong>References:<br></strong></p><p><strong>Method Summary</strong></p><p>Surveying methods should be used to verify the fill geometry and assure that proper lift thicknesses are used during construction. Lift thickness is very important for lightweight fill materials as density testing is not always possible depending on the material. In addition, soil lifts may be required between lifts of lightweight fill or as cover soil.

<p><p><strong>References:</strong></p><p><strong>Method Summary</strong></p><p>For granular lightweight fills, test sections are desirable at the start of construction to confirm or determine the number of passes required for compaction.