St/BA 폴리머 시멘트 모르타르의 물리적 특성 및 내구성

형원길; Won Gil Hyung

Polymer(Korea), Vol.33, No.4, 342-346, July, 2009

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St/BA 폴리머 시멘트 모르타르의 물리적 특성 및 내구성

Physical Properties and Durability of Polymer Modified Mortar Using Styrene and Butyl Acrylate Latexes

형원길^†

영남대학교 건축학부

Won Gil Hyung^†

School of Architecture, Yeungnam University, Gyeongsan 712-749, Korea

E-mail:

초록

본 연구에서는 스티렌(styrene; St)과 부틸아크릴레이트(butyl acrylate; BA)를 단량체 비에 따라 합성 제조하고, 합성제조된 시멘트 혼화용 폴리머를 혼입한 폴리머 시멘트 모르타르의 물리적 성질과 내구성에 대한 특성을 보통 시멘트 모르타르와 기존에 생산되어 현장에 적용되고 있는 St/BA계 폴리머 시멘트 모르타르를 비교 분석하고자 하였다. 실험결과, St/BA의 단량체 비가 50:50, 60:40일 경우에는 시멘트 혼화용으로 사용하기에 가장 적합하였으며, 강도특성에서도 우수한 결과를 나타냈다. 또한, 방수성능과 염화물 이온에 대한 침투 저항성, 그리고 중성화 저항성도 St/BA의 단량체 비가 증가할수록, 폴리머 시멘트 비가 증가할수록 증진효과가 우수한 결과를 나타냈다. 따라서, 본 연구를 통해 합성제조된 St/BA 라텍스를 시멘트 모르타르에 혼입할 경우 우수한 성능개선 효과를 얻을 수 있었다.

The effects of the monomer ratios on the typical properties of polymer modified mortars that contain styrene and butyl acrylate latexes was investigated. Basic data was also obtained that is necessary for the development of appropriate latexes for cement modifiers. Polymer modified mortars that contain styrene and butyl acrylate latexes polymerized with various monomer ratios were prepared for different polymer-cement ratios. They were then tested to obtain the particle size of the polymer latexes, air contents, water-cement ratios, flexural and compressive strengths, water absorption, and chloride-ion penetration. From the test results, the polymer modified mortars that have styrene and butyl acrylate latexes (with the mix proportions of synthesis having monomer ratios of between 40:60 to 60:40 for the appropriate mix proportions) could be recommended for practical applications. The basic properties of the polymer modified mortars were more affected by the polymer-cement ratio than by the monomer ratio, and were improved over unmodified mortar.

Keywords:polymer modified mortar;monomer ratio;polymerization.

[References]

Hyung W, Mun K, Kim W, J. Appl. Polym. Sci., 103(5), 3010 (2007)
Mun KJ, Hyung WG, Polym.(Korea), 32(6), 603 (2008)
Mun KJ, Song HR, Hyung WG, Polym.(Korea), 32(6), 555 (2008)
Pei M, Kim W, Hyung W, Ango AJ, Soh Y, Cement Concrete Res., 32, 837 (2002)
Ohama Y, Report of the Building Research Institute, 65, 100 (1973)
Ohama Y, Cement Concrete Comp., 20, 189 (1998)
Beeldens Anne, Influence of Polymer Modification on the Behaviour of Concrete under Severe Conditions, Katholieke Universiteit Leuven, Belgium, p 54 (2002)

[Referenced By]

[1] Hyung W, Mun K, Kim W, J. Appl. Polym. Sci., 103(5), 3010 (2007)

[2] Mun KJ, Hyung WG, Polym.(Korea), 32(6), 603 (2008)

[3] Mun KJ, Song HR, Hyung WG, Polym.(Korea), 32(6), 555 (2008)

[4] Pei M, Kim W, Hyung W, Ango AJ, Soh Y, Cement Concrete Res., 32, 837 (2002)

[5] Ohama Y, Report of the Building Research Institute, 65, 100 (1973)

[6] Ohama Y, Cement Concrete Comp., 20, 189 (1998)

[7] Beeldens Anne, Influence of Polymer Modification on the Behaviour of Concrete under Severe Conditions, Katholieke Universiteit Leuven, Belgium, p 54 (2002)