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http://dx.doi.org/10.4334/JKCI.2003.15.2.273

Properties of Polymer-Modified Mortars Using Methylmethacrylate-Butyl Acrylate Latexes with Various Monomer Ratios  

Hyung, Won-Gil (Dept. of Architectural Engineering, Chonbuk National University)
Kim, Wan-Ki (Dept. of Architectural Engineering, Hyupsung University)
Choi, Nak-Woon (Reseach Center of Industrial Technology, Chonbuk National University)
Soh, Yang-Seob (Faculty of Architecture & Urban Engineering, Chonbuk National University)
Publication Information
Journal of the Korea Concrete Institute / v.15, no.2, 2003 , pp. 273-279 More about this Journal
Abstract
The purpose of this study is to clarify the effect of the monomer ratio on properties of the polymer-modified mortars using methylmethacrylate-butyl acrylate(MMA/BA) latexes, and to obtain basic data necessary to develop appropriate latexes for cement modifiers. From the test results, we knew that the pore volume of polymer-modified mortars using MMA/BA latexes at bound MMA contents of 60 and 70 percent is 7.5∼75nm 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/BA 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/BA latexes is obtained at a bound MMA content of 70 percent and a polymer-cement ratio of 15%. 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/BA latexes polymerized with various monomer ratios are the variations of the pore size distribution with changing bound MMA content and the polymer-cement ratio.
Keywords
polymer; monomer ratio; synthesis; polymer-modified mortar; pore size distribution;
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