ROLE OF CHEAP ADDITIVES - MIXED CEMENT STABILIZATION IN RURAL ROADS

This study deals with the effect of chemicals and commonly available additives in India (surkhi lime, calcium carbonate, calcium chloride and sodium silicate) on a soil cement mixture. Soil samples from the Punjab area were subjected to identification tests and identified as A2 and A4 type soils, according to the Revised PRA Classification. Laboratory tests to determine moisture content, unconfirmed compressive strength and soil compaction, were carried out using each additive. The conclusions were that surkhi, calcium carbonate and lime were all cost effective additives. Calcium chloride is economical only in the case of A2 soil, where an addition of 0.5% produced cost savings of 12.3%, in road construction.