超高强水泥基材料的力学及耐久性能

A Review on the Mechanics and Durability in Ultra-high Strength Cement-based Composites Materials

超高强水泥基材料作为一种高性能建筑材料,在建筑工程领域已得到了广泛的关注和应用。简要介绍了超高强水泥基材料的发展历史、制备的基本途径和性能实现的基本原理,并且对近年来国内外学者关于超高强水泥基材料力学性能和耐久性能的研究进展进行了综述。综述内容包括:超高强水泥基材料的抗压强度、抗折强度、弹性模量、泊松比、应力应变曲线,以及超高强水泥基材料的抗渗、抗冻性能和碱骨料反应风险。在对已有文献的综述基础上,简要分析了纤维及养护制度对超高强水泥基材料性能的影响,并提出了超高强水泥基材料工程化的关键措施。

Ultra-high strength cement-based composites materials(UHSCC)as a new type of high-performance building materials,in the field of construction has provoked a wide range of attention and application.In this paper,an extensive literature review has been conducted on the developments of UHSCC,and the fundamental of materials preparations and performance index.The compressive strength,flexural strength,elastic modulus,Poisson s ratio and stress-strain curve of UHSCC are introduced in detail.We access the durability of UHSCC after complying from various research and field studies around the world,i.e.water or gas absorption capacity,chloride ions penetration property,resistance of freezing-thawing cycles and the expansion risk due to alkali-silica reactivity.The literature review reveals the influence of fiber dosage and curing regimes on the properties of UHSCC in brief,and puts forward the key measures for the promotion of UHSCC in engineering.