Polycarboxylate계 콘크리트 유동화제의 합성에 있어서 공중합 조건에 따른 계면물성 변화 및 이의 시멘트 몰탈의 물성에 미치는 영향

김영호; Young-Ho Kim

Applied Chemistry for Engineering, Vol.21, No.4, 463-468, August, 2010

The Effects of the Coplymerization Conditions in Synthesis of Polycarboxylic Type Superplasticizer on Interfacial Properties and on Cement Mortar Fluidity

김영호 ^†

한경대학교 화학공학부

Young-Ho Kim^†

Division of Chemical Engineering, Hankyong National University, Ansung 456-749, Korea

E-mail:

초록

콘크리트 유동화제로 사용되는 polycarboxylate 계 콘크리트 유동화제를 합성하였다. 합성에 있어서 친수기인 polyethylene oxide 부가몰 및 분자량에 따른 합성된 유동화제의 물성 및 이의 콘크리트 몰타르에 미치는 영향을 조사하였다. 합성원료로서 methoxy-polyethyleneglycol 및 methacrylic acid의 종류, methacrylic acid 부가량, 개시제 종류 및 양에 따른 graft 공중합 조건에 따라 얻어진 PC의 물성 및 이가 모르타르에 미치는 영향을 조사하였다. 물성으로는 PC 수용액의 계면물성, 시멘트 입자의 젖음성, 몰타르의 유동성 및 최종 콘크리트의 강도 등을 측정하였다. 합성된 PC는 수용액에 대한 표면장력 값이 작을수록 시멘트 입자에 대한 젖음성이 우수할수록 우수한 모르타르 유동성을 보였으며 콘크리트의 강도가 높았다. 본 연구 조건에서는 MPEG 대비 MA 함량이 1.3 정도일 경우 그리고 개시제가 KSP일 경우에 합성된 PC가 가장 적합하였다.

The polycarboxylic (PC) type concrete superplasticizer was synthesized. The effects of ethylene oxide group number and its molecular weight on the properties of the polycarboxylic type concrete superplasticizer and the concrete motar properties were studied. To investigated of the interfacial properties of the premixed-concrete with the superplasticizer, the type and the amount of polyethylene glycol, meta acrylate added, and type of the initialization agent were studied. Also the interfacial properties of the superplasticizer aqueous phase, the wettability on the cement particle, the fluidity of the cement mortar, and the strength properties of the concrete were measured. For a high fluidity of the cement mortar and a high strength of concrete, a low value of the surface tension and contact angle were required for PC. To have a good performance for PC, the reaction condition of 1.3 mol ratio of MA against to MPEG was suitable with KSP initiator.

Keywords:superplasticizer;polycarboxylic acid;cement;concrete

[References]

Choi JJ, J. Korea concrete institute, 13, 32 (2001)
Moon HY, Lee YS, Lee JS, Proceed. the Korea Concreate Inst. in 2003 fall, 265 (2003)
Kim HJ, J. the Korea Concrete Institute, 3, 31 (1991)
Park SB, Lee BS, J. the Korean Society of Agricultural Engineers, 26, 68 (1984)
Shin JY, Choi YJ, Hong JS, Proceed. of the Korea Concreate Inst. in 2006 spring, 77 (2006)
Ross S, Colloidal Systems and Interfaces, John & Wiley, NY, 229 (1988)
Pepin X, Blanchon S, Couarraze G, Powder Technol., 99(3), 264 (1998)
Merlin F, Guitouni H, Mouhoubi H, Mariot S, Vallee F, Van Damme H, J. Colloid Interface Sci., 281(1), 1 (2005)

[Related Articles]

[1] Choi JJ, J. Korea concrete institute, 13, 32 (2001)

[2] Moon HY, Lee YS, Lee JS, Proceed. the Korea Concreate Inst. in 2003 fall, 265 (2003)

[3] Kim HJ, J. the Korea Concrete Institute, 3, 31 (1991)

[4] Park SB, Lee BS, J. the Korean Society of Agricultural Engineers, 26, 68 (1984)

[5] Shin JY, Choi YJ, Hong JS, Proceed. of the Korea Concreate Inst. in 2006 spring, 77 (2006)

[6] Ross S, Colloidal Systems and Interfaces, John & Wiley, NY, 229 (1988)

[7] Pepin X, Blanchon S, Couarraze G, Powder Technol., 99(3), 264 (1998)

[8] Merlin F, Guitouni H, Mouhoubi H, Mariot S, Vallee F, Van Damme H, J. Colloid Interface Sci., 281(1), 1 (2005)