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http://dx.doi.org/10.4334/JKCI.2006.18.4.569

Effect of PC(Polycarboxylate) Type Superplasticizer on the Hydration Reaction of Cement Paste  

Chae, Eun-Jin (Applied Chemistry & Engineering Division, Korea Research Institute of Chemical Technology)
Shin, Jin-Yong (Applied Chemistry & Engineering Division, Korea Research Institute of Chemical Technology)
Suh, Jeong-Kwon (Applied Chemistry & Engineering Division, Korea Research Institute of Chemical Technology)
Lee, Jung-Min (Applied Chemistry & Engineering Division, Korea Research Institute of Chemical Technology)
Park, Jin-Won (Dept. of Chemical Engineering, Yonsei University)
Publication Information
Journal of the Korea Concrete Institute / v.18, no.4, 2006 , pp. 569-576 More about this Journal
Abstract
PC-type copolymers were synthesized using MPEG(polyethylene glycol methyl ether methacrylate, Mn=2080) to different mole ratios of mono-carboxylic acid(AA : acylic acid). The mole ratios of AA were 2, 3, 4 and PC-type terpolymers were synthesized using mono-, dicarboxylic acid(ITA : itaconic acid MAL : maleic acid) with the same graft chain. To investigate effects of PC-type co-, ter-polymers on the hydration of cement experiments involving FT-IR, XRD, DSC, SEM have been analysed with cement paste specimens to 1, 3, 28 day. The hydration reaction rate of cement paste was slightly delayed at 1 day, due to increase in molar ratio of [AA]/[MPEG], it was recovered in the days after and the copolymer was more active than the terpolymer, because of low carboxylic acid content PC-type copolymers applied 2AA-type were fastest copolymer on hydration reaction of cement paste to 3 day and the more AA mole ratios increased, the more hydration was retarded.
Keywords
PC-type superplasticizer; DSC; FT-IR; XRD; SEM;
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