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    Size-dependent compressive strength properties of hard rocks and rock-like cementitious brittle materials

    265469.pdf (1.472Mb)
    Access Status
    Open access
    Authors
    Darbor, M.
    Faramarzi, L.
    Sharifzadeh, Mostafa
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Darbor, M. and Faramarzi, L. and Sharifzadeh, M. 2018. Size-dependent compressive strength properties of hard rocks and rock-like cementitious brittle materials. Geosystem Engineering. 22 (4): pp. 179-192.
    Source Title
    Geosystem Engineering
    DOI
    10.1080/12269328.2018.1431961
    ISSN
    1226-9328
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/67917
    Collection
    • Curtin Research Publications
    Abstract

    Rock engineering projects have always been constructed on different (from micro to macro) scales. This makes understanding rock behaviour at different scales essential. In previous statistical studies on igneous hard rocks, the correlation of uniaxial compressive strength (UCS) values in different diameters with estimations of specimen size effect models was weak. In view of this knowledge gap, the present research proposed a model of appropriate size effect in igneous hard rocks. This research also aimed at discussing the effect of specimen size and grain size on the UCS of concrete specimens. To achieve these aims, studies were conducted in parallel on the previous and new experimental data. Non-linear regression analysis on igneous hard rocks indicated that there is a better agreement between the outputs of the multi-fractal scaling model and the specimen size effect model using the fracture energy theory and the results of previous laboratory tests. In addition, in the experimental study, the grain size effect on the predictions of specimen size effect models was exhibited. The results of this research can be used for designing engineering projects at different scales.

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