COMPARATIVE STUDY ON THE COMPRESSIVE STRENGTH OF CONCRETE USING NATURAL AND RECYCLED AGGREGATES.

Abstract

Concrete construction is becoming increasingly complex and the importance of producing structures that are both cost effective and durable has never been higher. Many experimental works have been performed to determine the compressive strength of different types of brick. The objectives of the study are to determine the compressive strength of concrete by using grades M20. The Materials used for the experiment are new aggregates & recycled aggregates, fine aggregate & water. The mass of the specimens was recorded carefully. For 7 days, the values of compressive strength of concrete for new aggregates & recycled aggregates are 1437 PSI for (new aggregates100%), 1819 PSI for (recycled aggregates100%), 1912 PSI for (new aggregates 33% & recycled aggregates 67%), 1963 PSI for (new aggregates 67% & recycled aggregates 33%), respectively of grade M20. For 14 days, the values of compressive strength of concrete for new aggregates & recycled aggregates are 2072 PSI for (new aggregates100%), 2305 PSI for (recycled aggregates100%), 2230 PSI for (new aggregates 33% & recycled aggregates 67%), 2084 PSI for (new aggregates 67% & recycled aggregates 33%), respectively of grade M20. For 21 days, the values of compressive strength of concrete for new aggregates & recycled aggregates are 2293 PSI for (new aggregates100%), 2835 PSI for (recycled aggregates100%), 2629 PSI for (new aggregates 33% & recycled aggregates 67%), 2268 PSI for (new aggregates 67% & recycled aggregates 33%), respectively of grade M20. For 28 days, the values of compressive strength of concrete for new aggregates & recycled aggregates are 2748 PSI for (new aggregates100%), 2811 PSI for (recycled aggregates100%), 2749 PSI for (new aggregates 33% & recycled aggregates 67%), 2826 PSI for (new aggregates 67% & recycled aggregates 33%), respectively of grade M20. For 7 days, the highest compressive strength of the concrete found 1963 PSI for (new aggregates 67% & recycled aggregates 33%) of grade M20 and the lowest compressive strength is 1437 PSI for new aggregates of grade M20. For 14 days, the highest compressive strength of the concrete found 2305 PSI for recycled aggregates of grade M20 and the lowest compressive strength is 2072 PSI for new aggregates of grade M20 For 21 days, the highest compressive strength of the concrete found 2835 PSI for recycled aggregates of grade M20 and the lowest compressive strength is 2268 PSI for (new aggregates 67% & recycled aggregates 33%) of grade M20 For 28 days, the highest compressive strength of the concrete found 2826 PSI for (new aggregates 67% & recycled aggregates 33%) of grade M20 and the lowest compressive strength is 2748 PSI for new aggregates of grade M20. The compressive strength of recycled coarse aggregates was better than the new coarse aggregates for the grade M20. TABLE OF CON