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材料导报  2019, Vol. 33 Issue (8): 1335-1339    https://doi.org/10.11896/cldb.17110298
  无机非金属及其复合材料 |
粉煤灰对水泥基材料水化过程电阻率的影响研究
廖宜顺, 沈晴, 徐鹏飞, 廖国胜, 钟侚
武汉科技大学城市建设学院,武汉 430065
Effect of Fly Ash on the Electrical Resistivity of Cement-based Materials During the Hydration Process
LIAO Yishun, SHEN Qing, XU Pengfei, LIAO Guosheng, ZHONG Xun
School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065
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摘要 本工作研究了粉煤灰掺量分别为0%、20%、40%时水泥浆体在72 h龄期内的电阻率、孔溶液离子浓度和孔结构的变化规律。结果表明,不同粉煤灰掺量的水泥浆体电阻率变化曲线会发生交叉,在交点之前,水泥浆体的电阻率随着粉煤灰掺量的增大而增大,在交点之后,随着粉煤灰掺量增大,水泥浆体的电阻率减小;掺入粉煤灰使得孔溶液的pH值降低,液相离子浓度减小,浆体总孔隙率增大。随着粉煤灰掺量的增大,水泥浆体的液相离子浓度变小,而孔隙率变大,受这两个因素的双重影响,不同粉煤灰掺量的水泥浆体的电阻率变化曲线产生交叉。
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廖宜顺
沈晴
徐鹏飞
廖国胜
钟侚
关键词:  硅酸盐水泥  粉煤灰  电阻率  离子浓度  孔结构    
Abstract: The evolution of electrical resistivity, concentration of ions in the pore solution and the pore structure of Portland cement pastes with fly ash in mass fraction of 0%, 20% and 40%, respectively during 72 h were investigated. The results show that the curves of electrical resistivity of cement paste blended with different contents of fly ash will intersect with each other. Before the intersections of the curves of electrical resistivity, the electrical resistivity increases with the increase of fly ash content, while after the intersections, the electrical resistivity is lower when the fly ash content is higher. The incorporation of fly ash leads to the decrease of pH value of the pore solution, the decrease of the ion concentration in the liquid phase and the increase of the total porosity. The ion concentration of the pore solution in the paste with higher content of fly ash is lower than that in the paste with lower content of fly ash, while the porosity is higher, the coupling effect results in the intersection of the curves of electrical resistivity.
Key words:  Portland cement    fly ash    electrical resistivity    ion concentration    pore structure
               出版日期:  2019-04-25      发布日期:  2019-04-28
ZTFLH:  TQ172  
基金资助: 国家自然科学基金青年基金(51608402);湖北省自然科学基金(2015CFB353);长江科学院开放研究基金(CKWV2014211/KY)
作者简介:  廖宜顺,武汉科技大学副教授,硕士研究生导师。2013年6月毕业于华中科技大学结构工程专业,获博士学位。Email: liaoyishun@wust.edu.cn
引用本文:    
廖宜顺, 沈晴, 徐鹏飞, 廖国胜, 钟侚. 粉煤灰对水泥基材料水化过程电阻率的影响研究[J]. 材料导报, 2019, 33(8): 1335-1339.
LIAO Yishun, SHEN Qing, XU Pengfei, LIAO Guosheng, ZHONG Xun. Effect of Fly Ash on the Electrical Resistivity of Cement-based Materials During the Hydration Process. Materials Reports, 2019, 33(8): 1335-1339.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.17110298  或          http://www.mater-rep.com/CN/Y2019/V33/I8/1335
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