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    Properties of Concrete Containing Recycled Coarse Aggregates and Fly ash

    Access Status
    Fulltext not available
    Authors
    Ahmed, Shaikh
    Date
    2011
    Type
    Conference Paper
    
    Metadata
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    Citation
    Ahmed, Shaikh. 2011. Properties of Concrete Containing Recycled Coarse Aggregates and Fly ash, in C. Leung and K.T. Wan (ed), International RILEM Conference on Advances in Construction Materials Through Science and Engineering, Sep 5-7 2011. Hong Kong: RILEM Publications.
    Source Title
    Proceedings of the International RILEM Conference on Advances in Construction Materials through Science and Engineering
    Source Conference
    International RILEM Conference on Advances in Construction Materials Through Science and Engineering
    ISBN
    978-2-35158-116-2
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/30731
    Collection
    • Curtin Research Publications
    Abstract

    This paper reports the properties of concrete containing recycled coarse aggregate (RCA) and fly ash (FA) obtained from local source in Perth, Western Australia (WA). RCA is used as 25, 50, 75 and 100% (by wt.) replacement of natural coarse aggregate (NCA). In addition, the effect of 40% (by wt.) class F fly ash as partial replacement of cement on the properties of recycled aggregate is also evaluated. The properties of concrete evaluated are the compressive strength, indirect tensile strength, flexural strength and water absorption. All properties are measured at 7, 28, 56 and 91 days. The results show that, better compressive, tensile and flexural strength of concrete containing 25% RCA as partial replacement of NCA can be obtained in recycled aggregate concrete. However, in the case of recycled aggregate concretes containing 40% FA the compressive strength at later ages such as at 56 and 91 days is increased but the indirect tensile and flexural strengths are decreased at all ages. It is observed that the water absorption is decreased as RCA content increased. It is also observed that the water absorption is decreased significantly in recycled aggregate concretes containing 40% FA at all ages.

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