一种超高耐久混凝土——梯度结构混凝土  

A Kind of Ultra High Durability Concrete——Gradient Structural Concrete

作　　者：王信刚[1] 王睿[2] 宋固全[1] 

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

出　　处：《南昌大学学报（理科版）》2009年第1期98-102,共5页Journal of Nanchang University(Natural Science)

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资助项目(GJJ09428)

摘　　要：分析超高耐久混凝土的研究现状,提出了一种高耐久、低成本的超高耐久混凝土——梯度结构混凝土(Gradient Structural Concrete,简称GSC),采用电量法和氯离子扩散系数法来评价梯度结构混凝土的抗氯离子渗透性能,最后进行梯度结构混凝土的寿命预测与成本分析。结果表明,高性能混凝土(High Performance Concrete,简称HPC)、无细观界面过渡区水泥基复合材料(Meso-interfacial transition zone-free cement-based materials,简称MIF)和梯度结构混凝土MIF-HPC的6 h导电量和氯离子扩散系数的排列顺序均为:HPC>MIF-HPC>MIF,其抗氯离子渗透性能排列顺序为:MIF>MIF-HPC>HPC。梯度结构混凝土的成本会有所增加,但由于其氯离子渗透性能大幅降低,其使用寿命得到大幅延长,使得其年损耗费用大幅下降。Study situation of Ultra High Durability Concrete（abbr.UHDC） was analyzed.A kind of UHDC named Gradient Structural Concrete（abbr.GSC） with high durability and low cost was put forward.Chloride ion penetration resistance of GSC was investigated by means of coulomb test method and chloride diffusion coefficient test method.Service life prediction and cost analysis of GSC were presented.The results show that the order of conductive charge for 6 hours and chloride diffusion coefficient of high performance concrete（abbr.HPC）,Meso-interfacial transition zone-free cement-based materials（abbr.MIF） and GSC named MIF-HPC is HPC〉MIF-HPC〉MIF,but the order of chloride ion penetration resistance is MIF〉MIF-HPC〉HPC.The cost of GSC is increased,chloride imperability is decreased and service life is increased,but consumption cost per year is decreased.

关 键 词：超高耐久混凝土 梯度 抗氯离子渗透 寿命预测 成本 

分 类 号：TU528[建筑科学—建筑技术科学]