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      EFFECT OF RECYCLED COARSE AGGREGATES IN PROPERTIES OF CONCRETE

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          Abstract

          The properties of concrete containing coarse recycled aggregates were investigated. Laboratory trials were conducted to investigate the possibility of using recycled aggregates from the demolition wastes available locally as the replacement of natural coarse aggregates in concrete. A series of tests were carried out to determine the density, compressive strength, split tensile strength, flexural strength and modulus of elasticity of concrete with and without recycled aggregates. The water cement ratio was kept constant for all the mixes. The coarse aggregate in concrete was replaced with 0%, 20%, 40%, 60%, 80% and 100% recycled coarse aggregates. The test results indicated that the replacement of natural coarse aggregates by recycled aggregates up to 40% had little effect on the compressive strength, but higher levels of replacement reduced the compressive strength. A replacement level of 100% causes a reduction of 28% in compressive strength, 36% in split tensile strength and 50% in flexural strength. For strength characteristics, the results showed a gradual decrease in compressive strength, split tensile strength, flexural strength and modulus of elasticity as the percentage of recycled aggregate used in the specimens increased. 100% replacement of natural coarse aggregate by recycled aggregate resulted in 43% savings in the cost of coarse aggregates and 9% savings in the cost of concrete.

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          Most cited references 19

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          “Concrete: Structures, Properties, and Materials”

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            “Relative moisture movement through recycled aggregate concrete”

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              “Suitability of recycled concrete aggregate for use in BS 5328 designated mixes”

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                Author and article information

                Journal
                jgrb
                College Publishing
                Journal of Green Building
                College Publishing
                1552-6100
                1943-4618
                1943-4618
                Fall 2008
                : 3
                : 4
                : 130-137
                Author notes

                1Assistant Professors, Department of Civil Engineering, Sona College of Technology, Salem-636 005, TamilNadu, India. Email: kumuthar@ 123456yahoo.co.in ; vijai_me@ 123456yahoo.co.in .

                Article
                jgb.3.4.130
                10.3992/jgb.3.4.130
                ©2008 by College Publishing. All rights reserved.

                Volumes 1-7 of JOGB are open access and do not require permission for use, though proper citation should be given. To view the licenses, visit https://creativecommons.org/licenses/by-nc/4.0/

                Page count
                Pages: 8
                Product
                Categories
                RESEARCH ARTICLES

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