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Insulation & Composite Foam Cores

GeoFoam(TM): 2-3 lb/ft3 Geotechnical EPS

GeoFoam 2.5 and 3.0 (2.5 to 3 lb/ft3) consist of rigid Expanded Polytyrene foam blocks highly effective in geotechnical engineering applications. GeoFoam has relatively low density yet high strength, good insulation value, low hydraulic conductivity, and superior strength deformation properties that complement soil behavior.

Kingspan-Dyplast can provide GeoFoam in blocks up to 20 feet in length, 4 feet wide and 40 inches thick to optimize the construction process, as well as densities from 1 to 3 lb/ft3. Our manufacturing facility can effectively handle any project in the Southeast United States, offering on-time and full deliveries.

GeoFoam has a wide variety of benefits since it can accelerate construction, expand possible solutions for difficult soil problems, has excellent load distribution characteristics, and can reduce overall construction costs. Uses include:

•Slope Stabilization                  •Embankments
•Landscape Design                   •Retaining Structures
•Utility Protection                      •Pavement Insulation
•Shallow Foundations               •Under Slabs
•Bridge construction                 •Highway construction
•Parking structures                    •Airport runways
•Earthen dam                              •Load control/buried pipes

Geotechnical engineers have long recognized the utility of lightweight fill to reduce mass and associated gravitational driving forces EPS GeoFoam is up to 50 times less massive than many soil-type fills.

The use of GeoFoam does not require pre-loading and removal normally associated with embankment construction on soft ground. Side slopes at 2:1 or even in vertical finish can be developed because GeoFoam imposes light loads on the foundation.

The use of GeoFoam expedites the design and construction of decorative formations without adding weight.

Placement of GeoFoam behind retaining structures and below-grade wall can offer advantages of reduced lateral pressure, lower settlements, improved waterproofing, and better insulation.

GeoFoam is also available in densities from 1-2 lb/ft3.

Rev: Geo 2/3 0421

Dyplast GeoFoam 2.5-3.0 lb/ft3 EPS Minimum Physical Properties per ASTM D6817

Density, minimum  lb/ft3 D303 or D1622 2.40 2.85
Compressive 1% Deformation: (Minimum) lb/in2 D1621 >15.0 >18.6
Compressive 5% Deformation: Actual (Minimum) lb/in2 D1621 >35.0 >43.5
Compressive 10% Deformation: Actual (Minimum) lb/in2 D1621 >40.0 >50.0
Flexural Strength lb/in2 C203 >60.0 >75.0
Oxygen Index % D 2863 >24 >24

ASTM D7180 (the Standard Guide for Use of Expanded Polystyrene (EPS) Geofoam in Geotechnical Projects) states that "the typical limit for many EPS geofoam projects is to consider the compressive resistance at 1% strain. The compressive behavior at 1% strain is within the elastic region of EPS geofoam and provides acceptable short-term deflections in addition to limiting long-term creep deformation, and behaves as a linear elastic material up to a strain of about 1%." As a result, the design recommendation of the majority of geotechnical engineers is to limit loading to the compressive resistance at 1% strain. Note, however that Dyplast GeoFoam at 2.5-3.0 lb/ft3 densities have been tested and found to have Compressive Resistance that exceeds the minimum requirements for ASTM D6817 even at higher deformations of 5% and 10%. Yet each end-user must ensure the design engineer considers the specific characteristics of the project.