KCI Concrete Journal

Korea Concrete Institute (한국콘크리트학회)
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Development of Polymer-Modified Cementitious Self-Leveling Materials for Thin Coat

  • Kim, Wan-Ki (Department of Architectural Engineering, Chonbuk National University) ;
  • Do, Jeong-Yun (Department of Architectural Engineering, Chonbuk National University) ;
  • Soh, Yang-Seob (Department of Architectural Engineering, Chonbuk National University)
  • Published : 2001.07.01
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Abstract

Recently, polymer-modified mortar has been studied for proposed use on industrial floors as top coat with thin thickness, typically 5~15mm. The purpose of this study is to evaluate basic properties of self-leveling materials using polymer dispersions as kinds of SBR, PAE, St/BA with thin coat (under 3mm). Superplasticizer and thickener have been included in the mixes to reduce bleeding and drying shrinkage as well as to facilitate the workability required. The self-leveling materials using four types of polymer dispersion are prepared with polymer-cement ratio which respectively range from 50% and 75%, and tested for basic characteristics such as unit weight, air content, flow, consistency change and adhesion in tension. From the test results, the self-leveling materials using PAE emulsion at curing age of 28days are almost equal to those of conventional floor using urethane and epoxy resin. The adhesion in tension of self-leveling mortars using SBR latex and PAE emulsion at curing age of 3days is over 17 kgf/cm$^2$(1.67MPa). Consistency change is strongly dependent on the type of polymer dispersion. It is concluded that the self-leveling materials using polymer dispersions can be used in the same manner as conventional floor using thermosetting resin in practical applications, in the selection of polymer dispersions.

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References

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