Use of Demolished Concrete in Construction

Huge quantities of construction and demolished waste are generated every year in developing countries likes India. the disposal of this waste concrete requires a large area to get disposed, recycle allow to utilize that area for other meaningful purposes. reuse of waste concrete involves breaking, crushing and removing contaminated& irrelevant materials from existing concrete, the target of the present thesis work is to determine the strength characteristics recycled aggregate for the application in concrete pavement construction. the scope of the thesis is to determine and compare the compressive strength, flexure strength and sulphate resistance of concrete by using different percentages of recycled aggregate. The investigation was carried out by using workability test, compressive strength test, flexural strength test and Sulphate resistance test. A total of five mixes with replacement o f coarse aggregate with 0 %, 10 %, 20 %, 30 %, 40 % recycled coarse aggregate water studied. the water cement ratio was kept constant at 0.40. it was observed that workability of concrete was decreased with the increasing recycled aggregate in concrete. for the strength characteristics, the results showed that the strength of recycled aggregate concrete was comparable to the strength of natural aggregate concrete.