A concrete admixture with water retention and superhydrophobic properties was developed according to the high tensile strength, fissure resistance, and antiseepage requirements of concrete linings. Capillary water absorption, early-age anticracking, cube compressive strength, and splitting tensile tests were employed to study the effects of the new concrete admixture on the basic performance of concrete. On this basis, a triaxial compression test was conducted on granite fissures filled with concrete containing the admixture; the stress-strain and failure characteristics under different admixture dosages, confining pressures, and fracture widths were analyzed, and the reinforcement effect of the concrete with the admixture on the fractured rock mass was studied. The results show that the admixture can effectively improve the ability of concrete to resist water and fissures, and the concrete with the admixture significantly reinforced the fractured rock mass. Therefore, it can be widely applied in filling and reinforcing fractured rock masses.

中文翻译：

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一种新型混凝土外加剂及其在花岗岩裂缝中充填加固作用的试验研究

根据混凝土衬砌的高抗拉强度、抗裂性和防渗要求，开发了一种具有保水和超疏水性能的混凝土外加剂。通过毛细管吸水、早龄抗裂、立方体抗压强度和劈裂拉伸试验研究了新型混凝土外加剂对混凝土基本性能的影响。在此基础上，对填充有掺合料的混凝土的花岗岩裂缝进行了三轴压缩试验；分析了不同外加剂掺量、围压和裂缝宽度下的应力-应变和破坏特性，研究了掺加料混凝土对裂隙岩体的加固效果。结果表明，外加剂能有效提高混凝土的抗水抗裂能力，掺加外加剂的混凝土对裂隙岩体有显着的加固作用。因此，可广泛应用于裂隙岩体的充填加固。