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一、前言早在1974年,从保护环境考虑,随着所有的化学灌浆材料(无毒性添加剂的硅酸盐水泥浆除外)的禁止使用,最初的微粒水泥大批开发于日本。第一个产品为On0damc-500,由细磨的波特兰水泥和细磨的粒化高炉矿渣组成,两者配比约为4∶1。这种产品既可作为与水分散剂混合的一种组分使用,也可在另一容器中与硅酸钠拌和为二组分使用。前者的凝结时间为4～5小时,后者仅有1～3分钟的极短凝结时间。这种微粒水泥在北美已成功地用于许多工程。由100%
I. INTRODUCTION As early as 1974, in consideration of the protection of the environment, with the prohibition of the use of all chemical grouting materials (other than Portland cement slurry without toxic additives), the first particulate cement was developed in large quantities in Japan. The first product, On0damc-500, consists of finely ground Portland cement and finely milled granulated blast furnace slag. The ratio is approximately 4:1. This product can be used either as a component mixed with a water dispersant or as a two component mixed with sodium silicate in another container. The former has a setting time of 4 to 5 hours, and the latter has only a very short setting time of 1 to 3 minutes. This microparticle cement has been successfully used in many projects in North America. By 100%