STUDY OF REINFORCED EMBANKMENTS AND SUB-BASE USING DEMOLITION WASTE

Abstract

The major problem construction world facing today is the scarcity of conventional construction material and increasing cost of construction by using these conventional materials. In recent years, use of various waste products in embankments and sub-base construction has gained considerable attention in view of shortage and high costs of suitable conventional aggregates due to depleting source of stones. During last few years, a lot of demolition has been carried out in cities like Delhi and this demolition material is being dumped in land fills and reclamation sites, this demolition material is also creating environmental pollution. An attempt is being made to use demolition waste as a construction material. In the present study, Jute Reinforcement has been tried with demolition waste. To find the effect of reinforcement over demolition material CBR tests and Shear tests were conducted. It was found that the optimum position of Jute geotextile is 1/3H from surface. By using Jute geotextile shear strength parameters such as cohesion(C) developed marginally and angle of internal friction (0 ) increased from 31.50 to 38°. To investigate the possibility of using recycled aggregate in sub-base. A series of proctor tests, CBR tests and plate load tests were conducted on various proportions of recycled aggregate and natural aggregate. The results showed that with increase in percentage of natural aggregate in blended mixture, MDD increases. The recycled & natural aggregates have highest and least MDD values respectively. This was mainly because of lower particle density and higher water absorption of recycled aggregates compared to natural aggregates. The CBR values of a mix of 60% recycled aggregates and - 40% natural aggregates has been found to be greater than 30%, which is the minimum CBR value for roads of high volume traffic. Different parameters are studied for WBM pavement models prepared with various proportions of natural aggregate and recycled aggregate. iii