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Advances in Materials Science and Engineering
Volume 2017, Article ID 3927106, 9 pages
https://doi.org/10.1155/2017/3927106
Research Article

Portland Cement Hydration Behavior at Low Temperatures: Views from Calculation and Experimental Study

1Key Laboratory for Special Area Highway Engineering, Ministry of Education, Xi’an, China
2School of Highway, Chang’an University, Xi’an, China

Correspondence should be addressed to Zhuangzhuang Liu; moc.liamg@6891gnauhzgnauhzuil

Received 14 April 2017; Revised 6 July 2017; Accepted 1 August 2017; Published 12 September 2017

Academic Editor: Aboelkasim Diab

Copyright © 2017 Zhuangzhuang Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Environmental condition affects the property of construction materials. This study gives an initial understanding of Portland cement hydration under low temperatures from the views of laboratory experiments (including electrical resistivity, degree of hydration (DoH), and maturity) as well as thermodynamic calculation. The hydrates of Portland cement at the given period were detected with X-ray diffraction (XRD), and their microstructure was observed by scanning electron microscope (SEM). Experiment result (i.e., DoH and electrical resistivity) indicated that the hydration of Portland cement was delayed by low temperature without hydration stopping at −5°C. Based on a basic kinetics model, the thermodynamic calculation predicted that the final hydrate differs in dependence on environmental temperatures. The mechanical behavior trend of Portland cement paste affected by low temperatures potentially is linked to the appearing of aluminate compounds and reduction of portlandite.