DESIGN OF STONE DUST STABILIZED ROAD

Soil is the foundation material which supports loads from the overlying structure. Soil is the most widely used material in a highway system, either in its natural form or in a processed form. Also, all pavement structures eventually rest on soil foundation. The construction cost can be considerably decreased by selecting local materials including local soils for the construction of the lower layers of the pavement such as the sub-base course. The present study is aims to design of pavement thickness for both unstabilized and stone dust stabilized soil. Stone Dust is procured from the Pal Stone Industry Halduchaur, the soil is excavated from the the campus of G.B. Pant University of Agriculture & Technology, Pantnagar, Uttarakhand, India. The material was extracted from 60cm below the ground surface. The overall testing program was conducted in three phases. In first phase, the geotechnical characteristics of the soil were studied by conducting laboratory tests such as compaction test, California bearing ratio test, specific gravity, unconfined compression strength test, direct shear test and consistency limit test. In second phase, the geotechnical characteristics of the stone dust were studied by conducting same laboratory tests as above. In third phase, the pavement thickness is calculated for unstabilized soil and stone dust stabilized soil which was obtained by adding optimum percentage of stone dust based on CBR test.