EFFECT OF CEMENT AND CORN COB ASH ON UCS AND DIRECT SHEAR TEST OF CLAYEY SOIL by Gurjap Singh
Abstract
The Soil present in natural conditions may not be appropriate for using it for any type of construction work. Soil present in nature at required site may be have no. of strength deficiencies such as its less tendency to withstand the load due to construction work having lower bearing capacity and high amount of compressibility. Soil therefore thus needs to be stabilized and its properties needs to be modified in appropriate way to gain high strength characteristics before its apllication for any type of construction work. Where agricultural commodities are grown and produced at large scale those nations are facing problems due to large amount of agricultural wastage produced like rice husk,corn cob,sugarcane baggasse.etc. Corn cobs are thrown in the field by farmers as waste. As corn cobs does not decompose easily results in causing numerous problems to surroundings as well as environment. Corn cob ash is produced by burning corn cobs. Corn cob ash rich source of silica and thus having large tendency to behave like pozzolana make it very suitable for using as cementious material. Objective and motive of study investigation is to investigate Soil:Cement:Corn Cob Ash mixture strength improvement by seeing its strength through UCS , DIRECT SHEAR TEST of stabilized soils. These tests were performed by addition of varying Soil:Cement:Corn cob ash mixtures. Having varying value of OMC and MDD. Locally obtained soil was tested by adding varying cement content. Corn cob ash was added in varying amount alongside optimized cement value. 7 and 14 days curing duration was done. For optimum mixture cement 2% and corn cob ash 6% compressive strength enlarged by 257 kN/m2 and 334 kN/m2 as equated to virgin soil strength for 7 and 14 days curing spell respectively. Shear strength for optimum mixture increased by 14kN/m2 as equated to virgin soil strength for 14 days curing spell.Consequently Strength parameters were found showing a sufficient improvement in the strength features of the soil.
