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An application concept for geofoam use as light-weight fill for embankment construction is shown above. Construction would begin with placement of a granular leveling course. Geofoam would then be placed in successive layers to construct the embankment. A 10 to 15 cm thick reinforced concrete slab or a membrane cover may be provided over the top of the geofoam. The concrete slab would help in load distribution.
The geofoam side slopes would be covered with soil, lightweight fill or protective facing. A road structure suitable for the anticipated traffic, and with adequate cover to minimize possibilities for differential icing can, where necessary, be constructed above the geofoam fill.
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