桥梁防撞护层对混凝土要求较高,具有强度高、耐冲磨、抗侵蚀等特点。根据工程设计要求,从混凝土原材料的选择、配合比的设计思路、高强混凝土的特点等方面为切入点,采用铁钢石及铁钢砂取代普通混凝土所用的常规骨料,通过掺加一定比例的硅灰,优化了铁钢砂混凝土配合比,满足工程设计要求的各项性能,并重点总结了铁钢砂混凝土原材料特点及混凝土配合比设计要点。 Bridge anti-collision coating on the concrete higher, with high strength, abrasion resistance, corrosion resistance and other characteristics. According to engineering design requirements, from the choice of concrete raw materials, mix design ideas, the characteristics of high strength concrete as the starting point, the use of iron and steel and iron steel sand instead of ordinary concrete used in conventional aggregate, by adding a certain percentage of Silica fume, optimize the mix ratio of iron steel sand concrete to meet the engineering design requirements of the performance, and focus on the summary of the iron steel sand concrete raw material characteristics and concrete mix design points.