Research of Electrical and Hydration Behavior of Phosphoaluminate Cementitious Material

摘要：

Electrodeless resistivity and impedance spectroscopy measurement are reliable equipments of test online for monitoring the hydration process of cement-based materials continuously and accurately. Phosphoaluminate cement (PAC) sets quickly and develops high early strength. In order to understand the mechanism, the hydration products and microstructure formation of PAC in early age need to be studied. In the study, early hydration process and impedance spectroscopy characteristics of PAC with different dosage of retarder were investigated. According to the test, resistivity of freshly mixed PAC paste decreases sharply and then rises slowly, some characteristic peaks appear at different hydration stages of PAC, which indicates the hydration process of PAC includes four stages which are dissolution, induction, acceleration and deceleration. Impedance spectroscopy can reflect the change of micro-structure and ion concentribution of PAC matrix by resistance and capacitance.

关键词： phosphoaluminate cement (PAC) electrodeless resistivity measurement hydration AC impedance spectroscopy (ACIS)

作者: ZHANG Ming DING Zhu LIU Peng WANG Mingke XING Feng

作者单位: School of Civil Engineering and Architecture,Central South University,Changsha 410075,China Shenzhen Shenzhen Durability Center for Civil Engineering,Shenzhen University,Shenzhen 518060,China School of Civil Engineering and Architecture,Central South University,Changsha 410075,China

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 926-930

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）