Geofoam General Information

Plasti-Fab manufactures moulded expanded polystyrene (EPS) products that have been used successfully in a wide variety of geotechnical applications. GeoSpec® lightweight fill material is expanded polystyrene (EPS) geofoam used in ground fill applications where a lightweight fill material is required. EPS geofoam has been used in projects involving a wide variety of applications worldwide for over 50 years.

GeoSpec EPS Geofoam Applications

  • Road construction over poor soils
  • Road widening
  • Bridge abutment
  • Bridge underfill
  • Culverts, pipelines & buried structures
  • Compensating foundation
  • Rail embankment
  • Landscaping & vegetative green roofs
  • Retaining and buried wall backfill
  • Slope stabilization
  • Stadium & theater seating
  • Levees
  • Airport runway/taxiway
  • Foundations for lightweight structures
  • Special Applications
  • Noise and vibration damping
  • Compression application
  • Seismic application
  • Rockfall/impact protection
  • Permafrost embankments

The table below material properties for GeoSpec geofoam product.

Table 1 – Typical Design Considerations

Material Property Units D6817 GeoSpec Type Designations
EPS12 EPS15 EPS19 EPS22 EPS29 EPS39 EPS46
Product Density
Minimum ASTM C303 		kg/m3
(pcf) 		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
Minimum @ 1% strain ASTM D1621 		kPa
(psi) 		15
(2.2) 		25
(3.6) 		40
(5.8) 		50
(7.3) 		75
(10.9) 		103
(15.0) 		128
(18.6)
Flexural Strength
Minimum ASTM C203 		kPa
(psi) 		69
(10) 		172
(25) 		207
(30) 		240
(35) 		345
(50) 		414
(60) 		517
(75)
Limiting Oxygen Index
Minimum ASTM D2863 		% 24 24 24 24 24 24 24
Additional Compressive Resistance Properties
Compressive Resistance
Minimum @ 5% Strain ASTM D1621 		kPa
(psi) 		35
(5.1) 		55
(8.0) 		90
(13.1) 		115
(16.7) 		170
(25.0) 		241
(35.0) 		300
(43.5)
Compressive Resistance
Minimum @ 10% strain ASTM D1621 		kPa
(psi) 		40
(5.8) 		70
(10.2) 		110
(16.0) 		135
(19.6) 		200
(29.0) 		276
(40.0) 		345
(50.0)