Abstract
As it is commonly known, the estimation of physical and mechanical characteristics of rocks is very important issue in various geotechnical projects. The characteristics are mainly influenced by the microfabric-texture features of rocks. In this research, dry unit weight, effective porosity, point load index, Schmidt rebound hardness, uniaxial compressive strength, and texture coefficient were measured with the aim of correlating the physical and mechanical properties to the texture coefficient. For this purpose, a comprehensive laboratory testing program was conducted after collecting twenty sedimentary block samples including nine limestones and eleven mudstones, taken from Kalidromo (central Greece) in accordance with ASTM and ISRM standards. Also, mineralogical and petrographic properties, textural characteristics as well as X-ray diffractions were studied and the obtained results were statistically described and analysed. The maximum and minimum values of the texture coefficient were 0.13 and 0.50, respectively. The highest value was obtained for the rocks with a large amount of grains. Regression analyses were used to investigate the relationships between the texture coefficient and the engineering properties. Thus, empirical equations were developed and because of the good determination coefficients, they showed that all of the engineering properties were well correlated to the texture coefficient.
摘要
岩石力学特性的估计在各种岩土工程中非常重要, 这些特征主要受岩石微细结构特征的影响。为了 将织构系数与力学性能联系起来, 测量了干容重、有效孔隙率、点荷载指数、施密特回弹硬度、单轴抗压 **度和织构系数。根据ASTM 和ISRM 标准从Kalidromo (希腊中部)采集了包括9 块石灰岩和11 块泥岩在 内的20 块沉积岩样品, 进行了全面的实验室测试, 对其矿物学和岩石学性质、结构特征及X 射线衍射进 行了研究, 并对所得结果进行了统计描述和分析。纹理系数的最大值为0.13, 最小值为0.50。颗粒含量较 高岩石的值最高。采用回归分析的方法研究了结构系数与工程性能之间的关系。建立了经验方程并选取了 最佳的决定系数, 结果表明, 所有工程特性与纹理系数具有良好的相关性。
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Diamantis, K., Fereidooni, D., Khajevand, R. et al. Effect of textural characteristics on engineering properties of some sedimentary rocks. J. Cent. South Univ. 28, 926–938 (2021). https://doi.org/10.1007/s11771-021-4654-5
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DOI: https://doi.org/10.1007/s11771-021-4654-5