铁道部科学研究院金属及化学研究所研制成的NFJ型高耐磨金属骨料是一种颗粒状的硬质金属材料,将它同普通水泥拌和后敷于刚浇好的混凝土表面,可以达到强化表面的功效。不仅使混凝土表面的耐磨性显著提高,以钢球法测试重量磨耗率＜1%,比金钢砂还好,而且还使其耐油、抗压、抗折、抗拉、抗冲击诸性能也得到增强,且在施工 The NFJ-type high wear-resistant metal aggregate developed by the Institute of Metals and Chemistry of the Ministry of Railways Science Research Institute is a granular hard metal material. It is mixed with ordinary cement and spread on the surface of freshly poured concrete to achieve Strengthen the efficacy of the surface. Not only improves the wear resistance of the concrete surface significantly, but also the weight loss rate of the steel ball method is less than 1%, which is better than that of the gold steel sand. Moreover, it also makes it resistant to oil, pressure, bending, tension, and impact. Has been enhanced and is under construction