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31 23 26 Geofoam
Free downloadable CSI 3 part specification to specify EPS Geofoam for engineering use, and geotechnical fill applications.
Geofoam is expanded polystyrene (EPS) manufactured into large lightweight blocks. The blocks vary in size but are often 2 m × 0.75 m × 0.75 m (6.6 ft × 2.5 ft × 2.5 ft).
The primary function of geofoam is to provide a lightweight void fill below a highway, bridge approach, embankment, or parking lot. Geofoam minimizes settlement on underground utilities.