Influenced by Salinity on Basic Properties and Strength in Supplementary Materials Admixed Coastal Clay

Abstract

Abstract

The object of this paper is to investigate the influenced by salinity on basic properties of coastal clay and unconfined compressive strength of supplementary materials admixed coastal clay. Various amount of salt degrees (Fresh water: Sea water = 0:1, 1:1 and 1:0) were added to the stabilized clay to study the effect of salinity on Atterberg’s limits, compaction characteristics and unconfined compressive strength. The supplementary materials used in clay were calcium carbide residue with biomass ash and Portland cement Type I replaced by biomass ash or calcium carbide residue at the same ratio as 15% by weight. It was found that the liquid limit, plastic limit and plasticity index decreased with the increase in saline clay. The more salt degrees increased the maximum dry density and decreased the optimum water content. The unconfined compressive strength increased as the salt degree increased due to the flocculated structure.

Keywords : Salinity; Coastal Clay; Calcium Carbide Residue; iomass ash; Unconfined  Compressive Strength.