基于MATLAB模拟的RPC抗氯离子渗透性分析  

Analysis of resistibility of reactive powder concrete to chloride ion penetration with MATLAB simulation

作　　者：金凌志[1,2] 何培[1,2] 岳丽莎[1,2] 

机构地区：[1]桂林理工大学广西岩土力学与工程重点实验室,广西桂林541004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《兰州理工大学学报》2014年第4期124-130,共7页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51368013);广西科技攻关项目资助(桂科攻0995004);广西重点实验项目(11-cx-04)

摘　　要：为研究不同活性掺合料活性粉末混凝土(RPC)在不同养护龄期下的抗氯离子渗透性能,利用MATLAB进行氯离子渗透模拟和线性拟合.对3组不同养护龄期、不同活性掺合料的RPC试件,在NEL试验条件下进行抗氯离子扩散系数试验,测定数据进行验证.结果表明:MATLAB软件可以较好地模拟RPC试件中氯离子二维扩散过程及其发展趋势,并对RPC试件氯离子扩散系数与养护龄期关系进行线性拟合;在相同养护龄期下,不同活性掺合料替代硅灰比例相同时,RPC试件抗氯离子渗透能力的大小依次为粉煤灰>硅粉>石英砂;同一种活性掺合料替代硅灰比例相同时,不同养护龄期RPC试件抗氯离子渗透能力的大小依次为28d>14d>7d.In order to study the chloride ion permeability of reactive powder concrete （RPC） with different active admixture and different curing period, MATLAB is adopted to conduct its simulations and linear fitting. Three groups of RPC specimens with different curing periods and different active admixtures are used to verify experimentally the tested data of the diffusion coefficient of chloride ion under NEL testing conditions. The result indicates that the MATLAB software can be used to simulate well the two-dimensional diffusion process of chloride ions and its development trend in R_PC specimen, and to conduct the curve fitting of the relation of the diffusion coefficient of chloride ion in RPC to the different curing periods of RPC; under the same curing period and mixing ratio of different active admixtures, substituted for silica dust, and the sequence of resistance of RPC specimen to chloride ion penetration is as follows： coal flue dust silica dust 〉 quartz sand; the sequence of resistibility of RPC with different curing periods, the same active admixture, and the same mixing proportion substituted for silica dust to chloride ion penetration is 28d〉 14d〉7d.

关 键 词：活性粉末混凝土 抗氯离子渗透性 活性掺合料 

分 类 号：TU503[建筑科学—建筑技术科学] TU528