Effect of Molarity of Geopolymers on Cement Kiln Dust and Unground Cement Clinker Admixed Black Cotton Soil

摘要

In the present study, the utilization of cement kiln dust (CKD) and unground cement clinker (UgCC) containing high amount of alkali is used in the production of geopolymerized black cotton (BC) soil is investigated. CKD and UgCC are cement industrial waste by products. Due to high alkali content of CKD and UgCC, its disposal as well as recycling poses problem. The objective of the present study is to utilize CKD and UgCC to be geopolymerized with BC soil using mixture of sodium silicate and sodium hydroxide at different molarity to induce cementation of BC soil to increase its strength and durability. The effect of molarity of sodium hydroxide on unconfined compressive strength (UCS) of the BC soil treated with CKD and UgCC is investigated. The effect of geopolymer on strength characteristic of BC soil have been studied for a curing period of 7 days, 14 days, and 28 days. The compressive strength of BC soil increases with geopolymer dosage and curing. The density of BC soil also increases with the increase in geopolymer. The test result indicates that geopolymer is very effective in stabilizing the soft soil.