Experimental study on different recycled aggregates towards strength of hardened concrete

Abstract

Conservation of natural resources and preservation of environment is the essence of any development. The problem arising from continuous technological and industrial development is the disposal of the waste material. If some of the waste materials are found suitable in concrete making, not only cost of construction can be cut down, but also safe disposal of waste materials can be achieved. So in the present paper, an attempt has been made to assess the suitability of stone dust and ceramic scrap in concrete making. In the laboratory stone dust has been tried as fine aggregates in place of sand has been used as partial substitute to conventional fine aggregates in concrete making. Cubes were cast and test for compressive strength after curing period of 7, 14 and 28 days. With an increase in our environmental consciousness, together with economic considerations, the construction industry is coming under intense scrutiny and pressures. The output results obtained from this laboratory program showed reliable data points and promising further research horizons. For concrete mixed with concrete waste the maximum compressive strength is 33.2Mpa with proportion 20%. Concrete mixed with glass the maximum compressive strength is 31.6Mpa with proportion 60%. Concrete mixed with fly ash the maximum compressive strength is 28.9Mpa with proportion 20%. Finally, for concrete mixes containing the optimal portion of fine waste material, it was concluded that there was negligible effects on the compressive strength.