STABILIZATION OF AN ALLUVIAL SOIL WITH DOLOMITIC LIME

Details are given of a laboratory study on alluvial soil to assess the possibility of using dolomitic lime in the construction of stabilized soil road bases. The effects of increasing the concentration of dolomitic lime on the development of strength under varying conditions of compaction density and varying lengths of curing period are assessed. Results are presented on the moisture-density relationship, on unconfined compressive strength, the c.b.r. Test, and liquid limit and plasticity index. It was found that with the addition of lime from 0 to 7.5% the optimum moisture content increases from 11 to 13.6% and maximum dry density decreases from 1.96 gm/cc to 1.84 gm/cc; that the unconfined compressive strength of soil increases with the addition of increasing percentage of dolomitic lime and there is a marked increase in strength with longer periods of curing; higher density gives higher strength; that soaked c.b.r. Value increases with the increasing concentration of dolomitic lime and there is a marked increase with longer periods of curing; higher density gives higher c.b.r. Value; that with the addition of dolomitic lime the liquid limit increases and the plasticity index decreases. The soil becomes virtually non-plastic with the addition of about 5% lime, and with the increase of curing period the liquid limit increases further when more than 3% lime is added and the soil tends to be non-plastic even with 3% dolomitic lime. /TRRL/