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Advances in Materials Science and Engineering
Volume 2018 (2018), Article ID 3203952, 10 pages
https://doi.org/10.1155/2018/3203952
Research Article

Influence of Organic Esters on Portland Cement Hydration and Hardening

1School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, China
2Department of Civil Engineering, Tsinghua University, Beijing, China

Correspondence should be addressed to Dong-min Wang; moc.361@8002-nimgnodgnaw

Received 25 May 2017; Revised 24 September 2017; Accepted 8 November 2017; Published 14 January 2018

Academic Editor: Francisca Puertas

Copyright © 2018 Duan-le Li 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

This paper investigated the effect of organic compounds with ester groups on the hydration and hardening of cement. The effects of five kinds of organic compounds with ester groups (ethyl acetate, dimethyl oxalate, glyceryl triacetate, trimethyl phosphate, and triethanolamine borate) on hydration heat, hydration degree, setting time, mechanical properties, microstructure, and pore structure of hardened cement slurry were studied. The test results showed that esters can make the end time of cement hydration induction longer and delay the occurrence of the second exothermic peak. Also, the effect of five kinds of esters on the hydration and hardening of cement was basically followed by TG> TB> DMO> EAC> TMP. In terms of molecular structure, for organic compounds containing only ester groups, the higher the number of ester groups, the greater the effect on the hydration of cement. The introduction of other functional groups (such as phosphate or borate) will influence the effect of the esters.