IMPROVEMENT OF THE SHEAR STRENGTH OF SOIL BY USING GLASS FIBRE

Abstract

Nowadays, soil strengthening is not a innovative idea; it was worn since ancient period to enhance the shear strength of soil. We know that, in ancient period, human were constructing dams which consists of mud reinforcement with grasses, tree trunks and stones to make sure the better depth in shallow streams. This material has capability to control the freezing of water in winter. The term plysoil has originated from fibre reinforced soil which consists of material obtained by adding randomly distributed discrete fibres to soil (RDFS). The methodused for fibre addition in soil, is general and similar to soil stabilization. The major compensations of randomly distributed discrete fibres be the ease in mixing and also maintaining the power of reinforced soil during extensive period of time. The reinforced soil be able to favourably used in civil engineering projects for improving the techniques related to soil, these techniques are used for providing sharp differences of level between two horizontal platforms, the horizontal platforms are providing on sloping ground, as quay walls, as bridge abutments, subgrade/sub-base and related to other problems. Glass which is an unbreakable material is used in todays world to enhance the shear strength of soil in adverse locations. Glass fibre is a non biodegradable material and it provides stability to reinforced soil. In present study, the physical properties of three different types of soils are as plastic limit, liquid limit, plasticity index, dry density, optimum moisture content etc. Addition of glass fibre having lengths 10 mm, 15 m and 20 mm to the soil with three different fibre content i.e. 0.5%, 1.0% and 1.5%,the mix of soil and glass fibre has done by hand and prepare homogenous mix with proper care. Then direct shear test has performed on both unreinforced and reinforced soil to study the behaviour of soil which is reinforced with glass fibre. After learn the results which clearly shows that the glass fibre used with increase in length and also fibre content increases the shear strength parameters of soil successfully.