Measurement and Evaluation of the Thermal Expansion Coefficient of Rock-Filled Concrete

    Volume 41, Issue 6 (November 2013)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 29 August 2013

    Page Count: 8


    Wang, Jin-Ting
    State Key Laboratory of Hydroscience and Engineering, Tsinghua Univ., Beijing,

    Wang, Shuo
    State Key Laboratory of Hydroscience and Engineering, Tsinghua Univ., Beijing,

    Jin, Feng
    State Key Laboratory of Hydroscience and Engineering, Tsinghua Univ., Beijing,

    (Received 4 October 2012; accepted 10 April 2013)

    Abstract

    Rock-filled concrete (RFC), formed by pouring self-compacting concrete (SCC) into rock blocks, is a newly developed type of mass concrete. It is important to determine its coefficient of thermal expansion (CTE) in engineering applications. In this study the CTE of RFC was determined for the first time using thermal expansion tests. RFC with three rock rates was measured at different ages. Meanwhile, the CTEs of SCC and rock blocks were experimentally tested for subsequent numerical simulation and theoretical analysis. The CTE of RFC was then evaluated numerically and theoretically based on the constituent materials. A three-dimensional finite element model was built for the numerical simulation of the thermal expansion tests of RFC. In addition, two composite models were used for the theoretical evaluation of the CTE of RFC based on the material parameters of SCC and rock blocks. The obtained numerical and theoretical CTE values agree well with the experimental CTE value. The numerical simulation and theoretical formulas can be used to estimate the CTE of RFC, thereby overcoming the high cost of complex experimental measurements.


    Paper ID: JTE20120293

    DOI: 10.1520/JTE20120293

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    Author
    Title Measurement and Evaluation of the Thermal Expansion Coefficient of Rock-Filled Concrete
    Symposium , 0000-00-00
    Committee C09