硫酸盐类 meaning in English

sulfates

But it has limitations such as inconsistency between strength and theological properties , the problem of volume invariability and the properties of resistance of sulfate erosion especially for concrete in excess of 70mpa . it is an difficulty for both the concrete industry and building industry to ensure the concrete in excess of 70mpa with good theological behavior , ease of transport , volume soundness and durability after hardened
高强混凝土在促进整个建筑业的进步方面功不可没,但是随着应用的混凝土等级的提高,特别是对于70mpa以上的混凝土已暴露出自身的一些缺陷,如混凝土强度与流变性能之间的矛盾,体积稳定性问题,抗硫酸盐类侵蚀性能力的下降等。要使70mpa以上的混凝土具有良好的流变性能,能轻易地泵送,并在硬化后有良好的体积稳定性和耐久性,是国内外混凝土和建筑施工业面临的一项技术难题。