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세공구조에 따른 MMA/EA계 폴리머 시멘트 모르타르의 성질
형원길(Hyung Won-Gil),송훈(Song Hun),김완기(Kim Wan-Ki),소양섭(Soh Yang-Seob) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.9
The purpose of this study is to clarify the effect of the monomer ratio on properties of the polymer-modified mortars using methyl methacrylate-ethyl acry late(MMA/EA) latexes, and to obtain basic data necessary to develop appropnate latexes for cement modifiers Polymer-modified mortars using MMA/EA latexes are prepared with various monomer ratios, and tested for porosity, flexural and compressive strengths, water absorption and chloride-ion penetration<br/> From the test results, we knew that the pore volume of polymer-modified mortars using MMA/EA latexes at bound MMA contents of 60 and 70 percent IS 75~750nm and the fine pore volume is increased with an increase in the polymer-cement ratio The total pore volume of polymer-modified mortars using MMA/EA latexes IS linearly reduced With an increase in the bound MMA content and increased in the polymer-cement ratio in general, the superior compressive strength of polymer-modified mortars using MMA/EA latexes is obtained at a bound MMA content of 60 percent and a polymer-cement ratio of 10% And, the water absorption and chloride ion penetration depth are greatly affected by the polymer-cement ratio rather than the bound MMA content The Important factors affecting the properties of polymer-modified mortars using MMA/EA latexes polymerized with various monomer ratios are the variations of the pore size distribution with changing bound MMA content and the polymer-cement ratio.<br/>
유화제 및 모노머 비에 따른 MMA/BA MMA/EA계 폴리머 시멘트 모르터의 성질
형원길(Hyung Won-Gil),최낙운(Choi Nak-Woon),김완기(Kim Wan-Ki),소양섭(Soh Yang-Seob) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.12
The purpose of this study is to clarify the effect of the emulsifier ratio on strength properties of the polymer-modified mortars using methylmethacrylate-butyl acrylate(MMA/BA), methylmethacrylate-ethyl acrylate(MMA/EA) latexes, and to obtain basic data necessary to develop appropriate latexes for cement modifiers.<br/> Polymer-modified mortars using MMA/BA, MMA/EA latexes are prepared with various monomer ratios, and tested for air content, flexural and compressive strengths, water absorption and chloride ion penetration. From the test results, the water-cement ratio and the air content of polymer-modified mortars using MMA/BA, MMA/EA latexes is decreased remarkably with an increase in the polymer-cement ratio irrespective of emulsifier and monomer ratio. And, the superior flexural and compressive strengths of polymer-modified mortars using MMA/BA latexes is obtained at a bound MMA content of 80 percent and a emulsifier ratio 6 percent, MMA/EA latexes is obtained at a bound MMA content of 60 percent and a emulsifier ratio of 6 percent. Also, the water absorption and chloride ion penetration depth are greatly affected by the polymer-cement ratio rather than the bound MMA and emulsifier content. Accordingly, it is judged that the polymer-modified mortars using MMA/BA, MMA/EA latexes can be used in the same manner as conventional polymer-modified mortars using the polymer dispersions.