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    Free water effect on the dynamic compressive properties of mortar

    Access Status
    Fulltext not available
    Authors
    Zhang, Xihong
    Chiu, Yu-wen
    Hao, Hong
    Cui, Jian
    Date
    2021
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhang, X. and Chiu, Y.-W. and Hao, H. and Cui, J. 2021. Free water effect on the dynamic compressive properties of mortar. Cement and Concrete Composites. 118: ARTN 103933.
    Source Title
    Cement and Concrete Composites
    DOI
    10.1016/j.cemconcomp.2021.103933
    ISSN
    0958-9465
    Faculty
    Faculty of Science and Engineering
    School
    School of Civil and Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/89099
    Collection
    • Curtin Research Publications
    Abstract

    This paper investigates the effect of free water on the dynamic compressive properties of mortar. Total-dried and full-saturated specimens are prepared through oven drying and water soaking processes. Common and high-porosity mortars are studied to examine the influence of porosity. Compression tests are carried out, covering strain rates between 1 × 10−6/s and 280/s. The test results show both dry and saturated mortar specimens are strain-rate sensitive. Free water results in softening effect in both common and high-porosity mortars at quasi-static and dynamic states. Retarding effect by pore water in the mortar is observed, which leads to lower longitudinal wave velocities in the saturated specimens. Water saturation increases the hydrostatic-pressure and leads to more severe water bursting; consequentially reduces the compressive strength. The experimental results demonstrate the free water deteriorates the compressive properties of mortars as a result of hydric expansion, which induces new cracks, especially in the high-porosity mortar.

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