ABSTRACT
Fly Ash is commonly used for soil stabilization. However, the demand for the product seldom meets the supply, and stockpiles become a necessity. These in turn are usually somehow restricted due to environmental concerns and limited availability of suitable areas. It was noticed that fly ash could sustain heavy trucks while the material was being transported and moved around between the stockpiles. The idea came up whether the fly ash could serve as a suitable material for industrial projects in lieu of more traditional ones. The benefits would be reducing stockpiles and saving resources of gravel. A falling weight deflectometer test was used to determine the mechanistic properties of fly ash. A minimum layer thickness was further determined on a given subgrade. It was found that fly ash could be used for structures carrying rather heavy vehicles, but there is a weak zone at a depth where high shear stresses occur. Freeze/thaw cycles may also affect this critical zone.
