Volume 3, Issue 1

    Estimating the Modulus of Elasticity of Pervious Concrete Based on Porosity

    (Received 14 May 2013; accepted 11 March 2014)

    Published Online: 2014

    CODEN: ACEMOAD

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    Abstract

    The modulus of elasticity is an important property for evaluating the mechanistic response of any material under load, and porosity influences the rheological, mechanical, and hydraulic properties of pervious concrete. The relationship between porosity and modulus of elasticity of pervious concrete has not been well researched. In this study, pervious concrete cylinder specimens were prepared for a range of porosities and compression tests were performed to determine the moduli of elasticity. Secant moduli of elasticity at five different stress levels (i.e., 2.2, 2.8, 3.3, 3.9, and 4.4 MPa) were calculated from the load-deformation data of the compression tests. Three performance zones were proposed for estimating the modulus of elasticity based on porosity at the stress levels of 2.2 and 2.8 MPa, i.e., lower, average, and upper. These performance zones provide designers with more information based on the variability and heterogeneous distribution of porosity in a pervious concrete section for risk-based assessments. While more research is required for comprehensive characterization of pervious concrete, the modulus of elasticity equation in the lower performance zone might provide an initial performance assessment of pervious concrete until its components can be better characterized.


    Author Information:

    Alam, Ashraful
    Department of Civil and Environmental Engineering, Washington State Univ., Pullman, WA

    Haselbach, Liv
    Department of Civil and Environmental Engineering, Washington State Univ., Pullman, WA


    Stock #: ACEM20130081

    ISSN: 2165-3984

    DOI: 10.1520/ACEM20130081

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    Author
    Title Estimating the Modulus of Elasticity of Pervious Concrete Based on Porosity
    Symposium , 0000-00-00
    Committee D09