负温高性能混凝土抗氯离子渗透性试验研究  

Experimental study on resistance-chloride ion penetration in sub-zero temperature of high performance concrete

作　　者：马保国[1] 王迎飞[1] 周丽美[2] 

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]济南大学材料科学与工程学院,山东济南250022

出　　处：《混凝土》2002年第11期18-20,共3页Concrete

摘　　要：　采用ASTMC1202-94对负温混凝土进行氯离子扩散性试验研究。在分别研究引气、减水、无机盐等组分和粉煤灰、硅灰等矿物掺合料对-5℃环境下的负温混凝土氯离子渗透性能影响的基础上,复配了FD-1型外加剂,并用它配制了-5℃环境下负温混凝土。试验结果表明其具备较好的早期防冻能力和抗氯离子渗透性能。按照冯乃谦与N S Berke、M C Hicks的经验公式分别计算了扩散系数(Deff)并进行了比较,认为冯乃谦回归公式计算结果比较接近负温高性能混凝土的氯离子扩散系数。Adopting rapid chloride ion penetration test(RCPT)ASTMC120294,the permeability of subzero temperature high performance concrete(STHPC)is studied.In the present paper,basis on the effect on resistancechloride ion penetration of each component on STHPC in -5℃ environment such as airentraining,waterreducing,inorganic mineral,fly ash and silica fume etc,FD1 composite admixture is manufactured. STHPC put up with FD1 possesses excellent ability of antifreezing and resistancechloride ion penetration.According to the experience formula of Feng Naiqian and N.S.Berke?M.C.Hicks,diffusion coefficient is calculated respectively and compared.It is concluded that Feng's formula approaches the practical diffusion coefficient of STHPC.

关 键 词：试验 外加剂 负温 高性能混凝土 扩散系数 氯离子 渗透性 

分 类 号：TU528.31[建筑科学—建筑技术科学]