| 碳酸盐粉煤灰水泥复合胶凝材料浆体的电学特性 |
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| 引用本文： | 李化建,谢永江,谭盐宾,易忠来,万广培. 碳酸盐粉煤灰水泥复合胶凝材料浆体的电学特性[J]. 北方交通大学学报, 2012, 0(3): 102-105 |
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| 作者姓名： | 李化建 谢永江 谭盐宾 易忠来 万广培 |
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| 作者单位： | [1]中国铁道科学研究院铁道建筑研究所,北京100081 [2]高速铁路轨道技术国家重点实验室,北京100081 [3]重庆大学材料科学与工程学院,重庆400044 |
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| 基金项目： | 国家自然科学基金资助项目（50908229）; 铁道部科技开发计划项目资助（2010G029-B） |
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| 摘 要： | 采用循环伏安法和交流阻抗法研究了碳酸盐粉煤灰水泥复合胶凝材料浆体的电阻率和交流阻抗等电学特性.结果表明：碳酸盐掺合料能够提高复合胶凝材料浆体的电阻率,碳酸盐和硅微粉惰性掺合料对复合胶凝材料浆体电阻率的贡献率大于粉煤灰和偏高岭土活性掺合料;碳酸盐掺合料降低了表征浆体C-S-H胶凝中导电离子的电容（Cg）;提高了表征复合胶凝材料浆体孔隙率的高频电阻（Rs）,即降低了浆体孔隙率;提高了表征浆体水化程度的低频电阻（Rct）.
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| 关 键 词： | 碳酸盐 复合胶凝材料 电阻率 交流阻抗 |
Electrical property of complex binder paste with carbonate-fly ash-cement |
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| LI Huajian,XIE Yongjiang,TAN Yanbin,YI Zhonglai,Wan Guangpei. Electrical property of complex binder paste with carbonate-fly ash-cement[J]. Journal of Northern Jiaotong University, 2012, 0(3): 102-105 |
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| Authors: | LI Huajian XIE Yongjiang TAN Yanbin YI Zhonglai Wan Guangpei |
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| Affiliation: | 1. Railway Engineering Research Institute, China Academy of Railway Science, Beijing 100081, China; 2. State Key Laboratory for Track Technology of High-Speed Railway, Beijing 100081, China; 3. College of Material Science and Engineering, Chongqing University, Chongqing 400044, China) |
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| Abstract: | The electrical properties such as electrical resistivity and AC impedance of complex binder paste system containing carbonate, fly ash and cement were studied by the methods of Cyclic Voltammerry and AC Impedance Spectroscopy. The results show that carbonate admixture could increase the electrical resistivity of paste. The contribution rate for electrical resistivity of inert mineral admixtures （carbonate, silica powder） to the paste is higher than that of active mineral admixtures （fly-ash, metakaoline）. Carbonate admixture can reduce the electric capacity （Cg） of the paste, characterizing conductive ionic in C-S-H gel, and increase the high frequency resistivity （Rs） , characterizing porosity of complex binder paste, in other words, the porosity of paste is decreased. Carbonate admixture can also enhance low frequency resistivity （Rct） which characterizes the hydration deuree of paste. |
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| Keywords: | carbonate complex binder electrical resistance AC impedance |
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