高性能混凝土的抗氯离子渗透性与耐久性评估  

Chloride ion penetration resistance of high performance concrete and its durability assessment

作　　者：王睿[1] 王信刚[2] 齐瑞文[1] 

机构地区：[1]南昌大学艺术与设计学院,江西南昌330031 [2]南昌大学建筑工程学院,江西南昌330031

出　　处：《混凝土》2010年第6期28-30,共3页Concrete

基　　金：国家"863"计划课题资助项目(2005AA332010);江西省教育厅青年科学基金项目(GJJ09428)

摘　　要：分析了钢筋混凝土中氯离子侵蚀引发钢筋锈蚀的机理,采用电量法和氯离子扩散系数法来评价高性能混凝土的渗透性,并进行氯离子侵蚀环境下的混凝土耐久性评估和寿命预测研究。结果表明:普通混凝土(简称OC)、高性能混凝土(简称HPC)和低渗透混凝土(简称LPC)的6h导电量和氯离子扩散系数的排列顺序均为:OC>HPC>LPC,其抗氯离子渗透性能排列顺序为:LPC>HPC>OC。HPC和LPC在氯离子侵蚀环境下的使用寿命能够满足设计基准期100年的设计要求,而OC不能达到设计基准期100年的设计要求。The mechanism of reinforcement corrosion caused by chloride penetration into concrete was analyzed.The permeability of high performance concrete was investigated by means of coulomb test method and chloride diffusion coefficient test method.Durability assessment and service life prediction of concrete exposed to chloride environment were study.The results show that the order of conductive charge for 6 hours and chloride diffusion coefficient of ordinary concrete（abbr.OC）,high performance concrete（abbr.HPC）and low permeability concrete（abbr.LPC） is OCHPCLPC,but the order of chloride ion penetration resistance is LPCHPCOC.Service life of HPC and LPC exposed to chloride environment could meet design requirement of 100 years,but OC couldn＇t meet design requirement of 100 years.

关 键 词：高性能混凝土 渗透性 耐久性 氯离子 寿命预测 

分 类 号：TU528.01[建筑科学—建筑技术科学]