Effect of Fly Ash on Swell Pressure
of an Expansive Soil
Assoc. Prof., Department of Civil Engineering
Middle East Technical University, Ankara, Turkey
ABSTRACT
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Effect of Fly Ash on Swell Pressure Assoc. Prof., Department of Civil Engineering | |
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ABSTRACT |
Heave of clayey soils poses a difficult problem to civil engineers. An evaluation of the expansive soil-fly ash system is presented in this study. Class-C fly ashes were added to the expansive soil at 0 to 25 percent. The properties obtained were the chemical composition, mineralogical composition, grain size distribution, consistency limits and swell pressure. Specimens treated with fly ash were cured for 7 days and 28 days, after which they were subjected to swell pressure tests. Fly ash treatment caused remarkable reduction in the swell pressure and the reduction was greater with increasing percent fly ashes and curing time.
Keywords: clay, curing, expansive soil, fly ash, stabilization, swell pressure
