Early hydration process of Portland cement paste by electrical measurement

被引：114
|
作者：
Wei, XS
Li, ZJ
机构：
[1] Huazhong Univ Sci & Technol, Dept Civil Engn, Wuhan 430074, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Civil Engn, Kowloon, Hong Kong, Peoples R China
来源：
JOURNAL OF MATERIALS IN CIVIL ENGINEERING | 2006年 / 18卷 / 01期
关键词：
Portland cements; electrical resistivity; measurement; material properties;
D O I：
10.1061/(ASCE)0899-1561(2006)18:1(99)
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
An electrical measurement technique was used to measure the electrical resistivity of cement paste having varying water/ cement (w/c) ratios, and consequently the paste properties and characteristics were analyzed. The different hydration periods were identified from the electrical resistivity curve and the differential electrical resistivity Curve. The setting time for the samples is reached before the first peak of the differential electrical resistivity curve, and this can provide a new method to determine setting time by using electrical resistivity measurements. The relation between w/c ratio and bulk resistivity at a fixed curing time follows a power law, so electrical resistivity can be used for determination of the w/c ratio in fresh and hardened cement pastes after calibration.
引用
收藏
页码：99 / 105
页数：7
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