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为了研究白垩系泥质粉砂岩的风化特性,对不同风化程度的泥质粉砂岩岩体进行了工程特性、风化耐久性和风化速度试验.试验结果表明:随着岩体风化程度的加深,岩石中粘土矿物含量增加,增幅达52.7%;活动性强的化学成分相对减少,含量由7.58%降到1.98%;岩石干密度降低,由2.58g/cm3降为2.31g/cm3;孔隙率由3.8%增至17.3%;吸水率由1.96%增至2.76%,力学性能降低,抗压强度由5.2MPa降至1.8MPa,抗拉强度由2.24MPa降至0.27MPa;岩体更容易软化崩解.岩石的风化速率与自身的风化状态和暴露的面积有关.表9,参6.
In order to study the weathering characteristics of Cretaceous argillaceous siltstone, the engineering properties, weathering durability and weathering rate of argillaceous siltstone rockmass with different degrees of weathering were tested.The results show that with the deepening weathering of rock mass, The content of clay minerals increased by 52.7%, the active chemical components decreased from 7.58% to 1.98%, the dry density decreased from 2.58g / cm3 to 2.31g / cm3, and the porosity increased from 3.8 % To 17.3%, the water absorption increased from 1.96% to 2.76%, the mechanical properties decreased, the compressive strength decreased from 5.2MPa to 1.8MPa, and the tensile strength decreased from 2.24MPa to 0.27MPa. The rock mass softened and disintegrated more easily. The weathering rate of rock is related to its own weathering and exposed area.