Literature Review on Cement Kiln Dust Usage in Soil and Waste Stabilization and Experimental Investigation

The globally growing demand of cement results in towering collection of kiln dust from cement plants. The disposal of this fine dust is very difficult and poses an environmental threat. To overcome this problem, research is being carried out in different parts of the world to find out economical and efficient ways and means of using cement kiln dust (CKD) in various applications like soil stabilization, cement production, pavements, waste product stabilization, agriculture and cement products, etc. This study presents a research review on CKD usage in soil and waste utilization and the results of experimental investigation on its usage in building block manufacturing and soil stabilization. The experimental results clearly showed that the use of 34% CKD may bring the pH of sludge above 10, which is enough to stabilize the sludge. Furthermore, the final concentrations of heavy metals were found to be within acceptable international limits. Tests conducted on blocks made using aggregates in the Eastern Province (Type-N) and light-weight pozzollanic aggregates (Type-P) indicated that addition of CKD to cement results in significant gain in strength of the blocks.