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Title |
Effect of PC(Polycarboxylate) Type Superplasticizer on the Hydration Reaction of Cement Paste
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Authors |
채은진 ; 신진용 ; 서정권 ; 이정민 ; 박진원 |
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Keywords |
PC계 고유동화제 ; 시차주사열계량법 ; 적외선 분광법 ; X-선 회절분석 ; 주사전자현미경 |
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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.
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