Abstract
The usefulness of fly ash or fly ash-soil mix has been explored in geotechnical, geoenvironmental, and agricultural projects. In most of these cases, fly ash alone or fly ash mixed soil remains in unsaturated state and the knowledge of water retention characteristics becomes very important. Water retention characteristics include the development of a graphical relationship between suction and water content (gravimetric or volumetric) known as suction-water content relationship (designated as SWR). It is noted that few studies discuss the comparison, critical evaluation, and uniqueness of SWRs for fly ash-soil mix. With this in view, experiments were conducted on a locally available cohesionless soil, an Indian fly ash and three different fly ash-cohesionless soil mixes using three different measurement procedures. The present study attempts to understand the uniqueness of SWR of fly ash-soil mixes obtained from different measurement procedures and compares the SWR equation parameters of soil-fly ash mixes. The study indicates that the measurement procedures influence the uniqueness of fly ash-soil SWR. It is also observed that the addition of fly ash increases the water retention characteristics of the cohesionless soil used in this study.
Published Version
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