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Effect of polymer latexes with varied glass transition temperature on cement hydration
Author(s) -
Lu Zichen,
Kong Xiangming,
Zhang Chaoyang,
Cai Yi,
Zhang Qing,
Zhang Yanrong
Publication year - 2017
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45264
Subject(s) - cement , polymer , materials science , glass transition , adsorption , chemical engineering , composite material , layer (electronics) , styrene , colloid , polymer chemistry , chemistry , copolymer , organic chemistry , engineering
Influence of styrene‐acrylate latexes with varied glass transition temperature ( T g ) on cement hydration was studied and the mechanism was analyzed. Results show that polymer latexes with varied T g retard cement hydration to different extents. Specifically, low T g polymer shows stronger retardation effect than the high T g polymer. Despite similar surface charges, colloidal particles with lower T g exhibit higher affinity to surface of cement grains than the high T g polymer, indicated by the higher adsorption amount and denser covering layer. The low T g polymer experiences particle packing, deforming, and film forming processes along with the consumption of water during cement hydration, which eventually produces a covering layer of polymer surrounding cement grains. However, for the high T g polymer, film forming process is absent. Consequently, the higher adsorption amount and the film‐formation process along with cement hydration are the two reasons for the stronger retardation effect of the low T g polymer. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45264.