Strength Behaviour of Fibre Reinforced River Sand

Abstract

The need for improvement of ground is ever increasing due to rapid growth in infrastructure development. The fibre reinforced sand is one of the popular ground improvement techniques. Efforts were made in this study to check the improvement of strength of sand by incorporating of fibre reinforcement. To achieve the objective, a series of direct shear tests were conducted on Beas river sand in its natural grain size form reinforced with three different fibre materials viz., Nylon, Jute and Coir. These fibres were mixed in 2% proportion, duly varying the Aspect Ratios at 10, 15 and 20. Most appropriate aspect ratio was selected for each fibre and the direct shear test was conducted at different mix proportions. The investigations showed an improvement in angle of internal friction upto 15.88%, 11.28% and 6.04% when 3% of nylon (Aspect ratio = 15), 3% of jute (Aspect ratio = 10) and 2% of coir fibres (Aspect ratio = 15) respectively, are used. The results indicated an improvement in strength behaviour of reinforced sand upto 29%, 36% and 19% when 3% of nylon (Aspect ratio = 15), 3% of jute (Aspect ratio = 10) and 2% of coir fibres (Aspect ratio = 15) respectively, are used.