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Uniaxial Compressive Strength Of Composite Rock Material With Respect To Shale Thickness Ratio And Moisture Content Zainab Mohamed Associate Professor Kamaruzaman Mohamed Postgraduate Student Cho, Gye Chun Associate Professor, Department of Civil and Environmental Engineering. Korean Advanced Institute of Science and Technology, South Korea |
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ABSTRACT |
The strength of intact rock is one of the prime parameter used to classify the quality of rock mass. So far the study is mainly on the behaviour of uniaxial compressive strength of a homogenous rock. Unfortunately, for tropical Kenny Hill sedimentary rock formation, the rock mass constitutes of more than one type named as composite rock. An experimental study was carried out to determine the strength and behaviour of a composite rock specimen made of sandstone and shale (Kenny Hill formation) at different moisture content. Shale was used as an intermediate layer of sandstone rock sample and prepared to the standard size as composite rock material. The composite specimens were tested for uniaxial compressive strength to failure and the results were analysed accordingly. A series of graphs was plotted to determine the uniaxial compressive strength of composite rock with respect to change in the shale constituent and moisture content. The result shows that shale has a great influence on the strength behaviour of Kenny Hill which is known to be dominated by sandstone. The higher moisture susceptibility of shale comparative to sandstone denotes a significant impact to the overall strength of the rock mass.
Keywords: Kenny Hill, composite rock, uniaxial compressive strength, sandstone, shale
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