Paper Title:
Resistivity Study on Early Hydration Process of Phosphoaluminate Cementitious Material
  Abstract

An electrodeless resistivity measurement system developed recently can provide a reliable method 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 of PAC with different dosage of retarder was investigated by the electrodeless resistivity equipment. According to resistivity-time curve, resistivity of freshly mixed PAC paste decreases sharply and then rises slowly, some characteristic peaks appear at different hydration stages of PAC. Heat evolution of PAC was also measured. The hydration mechanism and structure formation were studied according to these results. Depending on the dosage of retarder, the hydration process of PAC includes four stages which are dissolution, induction, acceleration and deceleration.

  Info
Periodical
Advanced Materials Research (Volumes 79-82)
Edited by
Yansheng Yin and Xin Wang
Pages
95-98
DOI
10.4028/www.scientific.net/AMR.79-82.95
Citation
M. Zhang, Z. Ding, F. Xing, P. Liu, "Resistivity Study on Early Hydration Process of Phosphoaluminate Cementitious Material", Advanced Materials Research, Vols. 79-82, pp. 95-98, 2009
Online since
August 2009
Export
Price
$32.00
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