Modification of strength properties of soil-aggregate system on cement addition

Abstract

Addition of chemical or cementitious additives is very effective in increasing the strength of soil. The effectiveness of these additives depends on the soil treated and the amount of additive used. In the present work in place of soil alone Soil-Aggregate mix is taken into consideration and the same is tested for strength parameters by increasing doses of cement addition. Soil-Aggregate mixture can be effectively used as base and subbase layer of a flexible pavement system. For assessing strength parameters tests such as Density determination, CBR and UCS are done with varying doses of cement. Wetting and drying tests are also performed for durability of Soil-Aggregate mix. Result shows an increase in the CBR and UCS value of the soil on increasing cement doses to Soil-Aggregate mix. Also results of durability test shows that increasing doses of cement addition is helpful in reducing the loss in weight of Soil-Aggregate mix. Results of standard proctor test shows that cement addition to Soil-Aggregate mix helps in reducing OMC increasing MDD value of soil. The optimum dose is then selected based on test conducted and results obtained.

Keywords: Soil-aggregate mixtures, Cement, CBR, UCS, MDD, OMC, durability