硅粉高性能混凝土强度及抗氯离子渗透性能研究

Study on Mechanical Strength and Chloride Penetration Resistance of Silica Powder High Performance Concrete

文中主要对不同养护龄期及不同硅粉掺量对高性能混凝土抗压强度、抗拉强度、抗氯离子渗透性的影响进行研究。研究结果表明,混凝土的坍落度与硅粉掺量呈现负相关关系,且在高掺量硅粉时,混凝土的坍落度下降幅度增加;硅粉高性能混凝土抗压强度、抗拉强度及氯离子扩散系数均与养护龄期成正相关关系;混凝土力学性能与硅粉掺量呈现先正相关后负相关的关系,氯离子渗透系数与硅粉掺量呈现先负相关后正相关的关系;当硅粉掺量为5%时,混凝土的力学性能及耐久性能均达到最佳。

In this paper,the effects of different curing ages and different silica powder content on compressive strength,tensile strength and chloride ion permeability resistance of high performance concrete were studied.The results show that the slump of concrete is negatively correlated with the amount of wollastonite,and the slump of concrete increases when the amount of wollastonite is high.The compressive strength,tensile strength and chloride ion diffusion coefficient of HPC are positively correlated with curing age.The mechanical properties of concrete are first positively correlated and then negatively correlated with the content of wollastonite,and the permeability coefficient of chloride ion is first negatively correlated and then positively correlated with the content of wollastonite.When the content of wollastonite is 5%,the mechanical properties and durability of concrete are the best.