Flyash Stabilization of Tropical Hawaiian Soils

by Peter G. Nicholson, Univ of Hawaii, Honolulu, United States,
Vinai Kashyap, Univ of Hawaii, Honolulu, United States,

Document Type: Proceeding Paper

Part of: Fly Ash for Soil Improvement


A preliminary study of soil improvement/stabilization of several tropical Hawaiian soils with locally generated high quality flyash admixtures has shown tremendous potential as an economical method to upgrade these 'poor to marginal' types of materials. These preliminary studies have shown such improvements a: increases of unconfined compressive strengths; changes in moisture-density relationship resulting in lower maximum dry densities, higher optimum water content, and less variations of dry density from the maximum over a much wider range of water contents; increases in CBR of more than 10-fold; reduction in plasticity; reduction in swell to less than 10% of the unstabilized values; and greatly increased workability.

Subject Headings: Tropical soils | Fly ash | Soil stabilization | Soil water | Density currents | Water content | Soil compression | Soil strength | Hawaii | United States

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