EPS geofoam is available in different material types. Thorough knowledge and understanding of the type being used on a EPS geofoam project is essential.
ASTM International has three standards pertaining to EPS geofoam.
- ASTM D6817 Standard Specification for Rigid Cellular Polystyrene Geofoam provides information on the physical properties and dimensions of expanded polystyrene intended for use as geofoam.
- ASTM D7180 Standard Guide for use of Expanded Polystyrene (EPS) Geofoam in Geotechnical Projects covers design considerations for the use of EPS in geotechnical applications.
- ASTM D7557 Standard Practice for Sampling of EPS Geofoam Specimens can be used for quality assurance.
| ASTM D6817 Physical Property Requirements of EPS Geofoam | ||||||||
|---|---|---|---|---|---|---|---|---|
| Density, min. kg/m3(lb/ft3) |
11.2 (0.70) | 14.4 (0.90) | 18.4 (1.15) | 21.6 (1.35) | 28.8 (1.80) | 38.4 (2.40) | 45.7 (2.85) | |
| Compressive Resistance, min., kPa (psi) at 1% |
15 (2.2) | 25 (3.6) | 40 (5.8) | 50 (7.3) | 75 (10.9) | 103 (15.0) | 128 (18.6) | |
| Compressive Resistance, min., kPa (psi) at 5% |
35 (5.1) | 55 (8.0) | 90 (13.1) | 115 (16.7) | 170 (24.7) | 241 (35.0) | 300 (43.5) | |
| Compressive Resistance, min., kPa (psi) at 10% |
40 (5.8) | 70 (10.2) | 110 (16.0) | 135 (19.6) | 200 (29.0) | 276 (40.0) | 345 (50.0) | |
| Flexural Strength, min., kPa (psi) |
69 (10.0) | 172 (25.0) | 207 (30.0) | 240 (35.0) | 345 (50.0) | 414 (60.0) | 517 (75.0) | |
| Oxygen, min., volume % |
24.0 | 24.0 | 24.0 | 24.0 | 24.0 | 24.0 | 24.0 | |