Characterization of Yield Stress Development of Cement Paste by Electrical Resistivity
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2017年第6期
论文作者：Mbujje Joel Webster 魏小胜 ZHOU Kongjin
文章页码：1361 - 1367
摘 要：Yield stress development of cement paste is potentially governed by percolation of 3-dimensional links formed by hydration products on the surface of the particles. It rises steadily at a gradual rate before a sudden increase in rate of growth. In this study, a method was proposed to predict the yield stress development based on the diameter of spread（D） of mini slump cone test and gradient from electrical resistivity measurement（Km）. To evaluate the significance of（D） and（Km） in terms of yield stress, they were quantitatively compared to the initial yield stress（τ0） and rate of yield stress growth（K） obtained from a rheometer. A mathematical relationship between the yield stress of cement paste, diameter of spread and electrical resistivity characteristic gradient was developed. The equation developed can be used as an alternative method to estimate yield stress of cement paste.
Mbujje Joel Webster1，魏小胜1，ZHOU Kongjin2
1. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology2. State Key Laboratory of Silicate, Wuhan University of Technology
摘 要：Yield stress development of cement paste is potentially governed by percolation of 3-dimensional links formed by hydration products on the surface of the particles. It rises steadily at a gradual rate before a sudden increase in rate of growth. In this study, a method was proposed to predict the yield stress development based on the diameter of spread（D） of mini slump cone test and gradient from electrical resistivity measurement（Km）. To evaluate the significance of（D） and（Km） in terms of yield stress, they were quantitatively compared to the initial yield stress（τ0） and rate of yield stress growth（K） obtained from a rheometer. A mathematical relationship between the yield stress of cement paste, diameter of spread and electrical resistivity characteristic gradient was developed. The equation developed can be used as an alternative method to estimate yield stress of cement paste.
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