废旧橡胶喷射混凝土力学性能研究

Study on mechanical properties of waste rubber sprayed concrete

为改善巷道喷射混凝土的变形性,研究了不同粒径(26、40、60目)、不同掺量(5%、10%、15%、20%)废旧橡胶颗粒对喷射混凝土力学性能的影响,结果表明:橡胶颗粒的掺入能够提高喷射混凝土的断裂挠度、折压比,改善了喷射混凝土的变形能力;试验研究中粒径为40目,掺量为10%时,喷射混凝土的韧性指标最佳;橡胶颗粒的掺入使喷射混凝土的抗压强度和劈裂抗拉强度均有所降低,抗折强度略有增长。

in order to improve the deformation of tunnel shotcrete, the influence of different particle sizes （26, 40, 60.5%, 10%, 15%, 20%） on the mechanical properties of concrete was studied. The results show that the incorporation of rubber particles can increase the fracture deflection and the pressure ratio of jet concrete, and improve the deformation capacity.