Performance study on stabilizaion of peat soil Using flyash and m sand

Abstract

Peat is a fibrous mass of organic matter in various stages of decomposition generally dark brown to black in color and of spongy consistency. Peat soil is composed of high contents of fibrous organic matter and is produced by the decomposition of organic matter such as plant remains, leaves, and trunks. Peat soil has geotechnical properties such as high water content, high organic matter content, low shear strength, low bearing capacity and high compressibility which make it as a difficult soil for construction of structures in its natural state. In India large area of land is covered by peat soil so improvement mechanism is needed for construction of structures upon it. Therefore, available admixtures such as Fly ash (FA) and Manufacturing sand (MS) have been selected for stabilization of peat soil. Fly ash has been mixed with peat soil in different percentages: 0%, 4%, 8%, 12%, 16%, 20%, 24% and 28%. Proctor compaction mixed with peat soil in different percentages: 0%, 4%, 8%, 12%, 16%, 20%, 24% and 28%. Proctor compaction test, Liquid limit test, Unconfined compressive strength test are conducted on stabilized soil to determine admixture impact on Geotechnical properties. Laboratory tests results show that maximum dry density (MDD) and unconfined compressive strength (UCC) of stabilized soil are maximum at 20% fly ash. This optimum value of fly ash is replaced with M sand by various percentages 4, 8, 12, 16, 20, 24, and 28% of the optimum value of fly ash and results shows that MDD and UCC are maximum at 24% replacement of fly as