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RMAX GeoFoam® meets or exceeds the requirements of AS 1366.3 and American Standard ASTM D6817” Standard Specification for Rigid, Cellular Polystyrene Geofoam”. RMAX conducts routine, rigorous testing of RMAX GeoFoam® to ensure quality is maintained to these standards.

California Bearing Resistance (CBR)
CBR is a measure of the resistance of a material to load. It is used to compare materials used as subgrade. The value for EPS depends to an extent on density. Typical values are between 2% and 4%.

Further Reading

AS 1366.3
ASTM D7180-05 Standard Guide for Use of Expanded Polystyrene (EPS) GeoFoam in Geotechnical Projects

National Cooperative Highway Research Program (NCHRP) Report 529 – Guideline and Recommended Standard for Geofoam Applications in Highway Embankments 2004.

International Geotechnical Symposium Polystyrene Foam in Below Grade Applications – Hawaii, 1994

Properties and Applications of Geofoam – D. Negussey, Ed. Society of Plastics Industry, Inc, 1997

Vicroads Engineering Excellence Awards 1997- Repairing Roads with Polystyrene

Geopave Technical Note 25 Embankment/Landslip Repair using Expanded Polystyrene Vicroads 2006


Website of the USA Federal Highway Adminstration’s Research and Technology Program

Website of The Geofoam Research Center (GRC) at Syracuse University