Vol. 1, Issue 10 (2016)
Compaction characteristics of lateritic soil mixed with cement and fly ASH EACH at 10%, 12% and 14%
Author(s): Akinola Johnson Olarewaju
Abstract: This paper explains the compaction behaviours relatively high dosage of cement and fly ash stabilized lateritic soil. This is to know the effects of fly ash and cement when added to laterite as stabilizing agents. The lateritic soil was taken from a borrow pit at Ona-Egbo, located along Ilaro Express road, Ilaro, Ogun State, Nigeria and the Fly ash material was taken from Ewekoro cement factory along Papa-Itori road, Ewekoro, Ogun State. Cement used is elephant Portland cement. Fly ash and cement each at 10%, 12% and 14% were used to replace lateritic soil at water ratio ranging from 2% to 14%. The tests conducted in line with BS 1377 (1990) are moisture content and compaction. From the results, at the percentages of fly ash and cement investigated, the dry densities of both fly ash and cement are higher than that of control (0%) while that of fly ash is higher than that of cement due to the heat of hydration in cement. In the case of moisture content, at 10% fly ash and cement, the moisture content of cement is similar to that of fly ash with both lower than control (0%). At 12% and 14% fly ash and cement, the moisture contents of both the fly ash and cement are lower than that of control. Finally the moisture content increased as the water ratio increases in the same proportion. With close similarities in the results of cement and fly ash at the investigated dosage, fly ash could be substituted with cement for engineering purposes similar to that of cement. In areas where there is availability of fly ash, demand for cement would be greatly reduced.