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Title |
The Properties of Concrete Incorporating Stone Powders as Part of Fine Aggregates
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Authors |
강수태(Su-Tae Kang) ; 서준영(Jun-Young Seo) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2016.20.5.116 |
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Keywords |
Stone powder ; Workability ; Air content ; Strength ; Drying shrinkage ; High-range water reducing admixture |
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Abstract |
This study was intended to evaluate the properties of concrete incorporating stone powders which are created during crushing natural stones to produce crushed aggregates. For concretes with 0~30 wt.% partial replacement fine aggregates with stone powders, experiments of slump, air content, strength and drying shrinkage were carried out. The experiments found that the increase of the amount of stone powders sharply decreased slump and air content. Partially using stone powders instead of fine aggregates was found to increase both compressive and tensile strength slightly. Substituting higher amount of stone powders presented higher drying shrinkage. When HRWRA was added into the concrete with stone powders in order to obtain workability similar to that of plain concrete without stone powders for the same water-cement ratio and unit weight of cement, air content increased with the amount of HRWRA but strength and drying shrinkage were hardly affected by adding HRWRA.
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