高性能混凝土研究进展Ⅱ:耐久性能及寿命预测模型

Research Progress of High Performance Concrete Ⅱ:Durability and Life Prediction Model

综述了高性能混凝土耐久性能方面的研究进展,包括高性能混凝土的抗氯离子渗透性能、抗冻融性能、抗碳化性能、抗盐侵蚀性能以及多种因素耦合作用下的耐久性能等,介绍了与高性能混凝土耐久性相关的损伤模型和寿命预测模型,并分析了高性能混凝土耐久性能研究现存的一些问题。分析发现:高性能混凝土的耐久性能受材料种类、掺量、实验条件等因素的影响,适量的矿物掺合料和外加剂能够减少混凝土内部有害孔的数量,增加结构的密实度,提高混凝土的耐久性能。多种因素耦合作用下的混凝土耐久性及损伤模型、寿命预测模型等更接近结构所处环境的实际情况,这将会成为高性能混凝土耐久性方面研究的一个热点。

This paper reviewed the progress of research on durability of high performance concrete,including anti-chloride ion permeability,freeze-thaw resistance,carbonation resistance,salt corrosion resistance,and durability under the coupling of multiple factors of high performance concrete,discussed the damage model and life prediction model of high performance concrete,and analyzed the existing problems of research on durability of high performance concrete.Results demonstrated that the durability of high performance concrete is influenced by the type and amount of material,the experimental conditions,et al.The appropriate amount of mineral admixtures and additives can reduce the number of harmful holes in the concrete,increase the density and improve the durability of concrete.Besides,the study on durability,damage model and life prediction model of concrete under multi-factor coupling effect,is more close to the actual circumstances of the structure,and this will become a hot spot of durability of high performance concrete.