Evolution of pH and chemical composition of pore solution in carbonated concrete
Evolution of pH and chemical composition of pore solution in carbonated concrete
复制标题
碳化混凝土孔隙溶液pH值和化学成分的演变
DOI：
10.1016/j.conbuildmat.2011.09.006
复制
发表时间：
2012-03
影响因子：
7.4
通讯作者：
Zhang, Yan
中科院分区：
文献类型：
--
作者：
Pu, Qi;Jiang, Linhua;Xu, Jinxia;Chu, Hongqiang;Xu, Yi;Zhang, Yan
研究了混凝土的碳化过程，即不同碳化程度混凝土孔隙溶液的pH值和化学组成的变化。混凝土试件采用普通波特兰水泥和粉煤灰，尺寸为直径100mm ×高度3mm，有6种不同的配合比。将混凝土样品暴露于环境（CO25%，RH40%）以加速碳化。测量从混凝土中提取的粉末状样品的悬浮液pH值以进行比较。结果表明，土壤孔隙溶液pH值主要在15 d内下降，在15 d内，土壤孔隙溶液pH值与碳酸化时间呈近似线性关系。孔隙溶液中Na+、K+含量在碳酸化过程中主要在前3d内下降，在随后的碳酸化过程中变化不大。碳化混凝土孔隙溶液的pH值可以通过悬浮液pH值来推断。
An investigation of carbonation in concrete, the pH and chemical composition change of the pore solution in concrete with different degrees of carbonation, was presented. The concrete samples were manufactured using ordinary portland cement and fly ash with dimension of 100mm diameter by 3mm in height, and six different mix proportions. The concrete samples were exposed to the environment (CO25%, RH 40%) to accelerate carbonation. The suspension pH of the powdered sample, extracted from concrete, was measured for comparison. It was found that the pH values of the pore solution were mainly decreased in 15days and the correlation between the pore solution pH and the carbonated period seemed to be almost linear in 15days. The contents of Na+and K+in pore solutions were decreased mainly in first 3days in the carbonation periods and had little change in the next carbonated periods. The pore solution pH of carbonated concrete could be inferred by suspension pH.
登录
查看更多内容
影响因子：
11.4
作者：
K. Byfors;C. Hansson;J. Tritthart
通讯作者：
K. Byfors;C. Hansson;J. Tritthart
DOI：
--
发表时间：
2000-03
期刊：
--
影响因子：
--
作者：
D. Anstice
通讯作者：
D. Anstice
影响因子：
1.6
作者：
W. Grimes;W. Hartt;D. H. Turner
通讯作者：
W. Grimes;W. Hartt;D. H. Turner
影响因子：
11.4
作者：
Anstice, DJ;Page, CL;Page, MM
通讯作者：
Page, MM
影响因子：
11.4
作者：
HAQUE, MN;KAYYALI, OA
通讯作者：
KAYYALI, OA