硅粉是一种高凝硬性的矿物外加剂,主要用以增进混凝土的耐久性和强度,也可用作为硅酸盐水泥的替代物。美国、加拿大和北欧国家最早使用硅粉,而现在世界其他地区也日益广泛地应用它。无论干式的还是湿式的喷射混凝土中掺入硅粉后性能都明显得到改善,更好地用于岩石稳定、隧道衬砌和基础结构的修复。 Silica fume is a highly coagulant mineral admixture, mainly used to improve the durability and strength of concrete, it can also be used as a substitute for Portland cement. Silicone powder is the earliest used in the United States, Canada and the Nordic countries, and it is now increasingly used elsewhere in the world. Both dry and wet shotcrete have significantly improved performance after incorporation of silica fume and are better for rock stabilization, tunnel lining and infrastructure repair.