Effect of Fly Ash on the Shear Strength of Concrete Beams Without Shear Reinforcement

    Volume 2, Issue 1

    ISSN: 2165-3984

    CODEN: ACEMOAD

    Published Online: 31 May 2013

    Page Count: 19


    Arezoumandi, Mahdi
    Candidate/Graduate Research Assistant, Dept. of Civil, Architectural and Environmental Engineering, Missouri Univ. of Science and Technology, Rolla, MO

    Volz, Jeffery S.
    Assistant Professor, Dept. of Civil, Architectural and Environmental Engineering, Missouri Univ. of Science and Technology, Rolla, MO

    Ortega, Carlos A.
    Graduate Research Assistant, Dept. of Civil, Architectural and Environmental Engineering, Missouri Univ. of Science and Technology, Rolla, MO

    (Received 1 December 2012; accepted 1 May 2013)

    Abstract

    The following paper presents the results of an experimental investigation of the shear strength of full-scale reinforced concrete beams constructed with both high-volume fly ash concrete (HVFAC)—concrete with at least 50 % of the cement replaced with fly ash—and conventional concrete (CC). This study includes two HVFAC mixes and one CC mix. The two HVFAC mixes are identical except for the amount of Class C fly ash replacement of cement, with one mix replacing 50 % of the cement with fly ash and the other replacing 70 %. The test matrix included 18 beams—six for each concrete type—with three different longitudinal reinforcement ratios. The test results were compared to the shear provisions of both U.S. and international design codes, including the design provisions from Australia, Canada, Europe, and Japan. Furthermore, the shear strengths of the beams were evaluated based on fracture mechanics approaches, modified compression field theory (MCFT), and a shear database of CC specimens. Results of this study show that the HVFAC mixes possess comparable shear strength with the CC.


    Paper ID: ACEM20120052

    DOI: 10.1520/ACEM20120052

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    Author
    Title Effect of Fly Ash on the Shear Strength of Concrete Beams Without Shear Reinforcement
    Symposium , 0000-00-00
    Committee C09