Performance of polymer-modified self-levelling mortars with high polymer-cement ratio for floor ...

Summary

Recently, polymer-modified mortar has been studied for proposed use on industrial floors as a top coat with a typical thickness of 5-15 mm. The basic properties of self-levelling materials were evaluated using polymer dispersions as kinds of SBR latex, PAE and St/BA emulsions for thin coatings (under 3 mm in thickness). Superplasticiser and thickener were included in the mixes to  reduce bleeding and drying shrinkage as well as to facilitate workability. Self-levelling materials with four types of polymer dispersion were prepared with polymer-cement ratios of 50% and 75%, and their density, flow, consistency change and adhesion in tension were determined. Test results showed that the self-levelling mortars using PAE emulsion at a curing age of 28 days were almost equal to those of a conventional floor using urethane  and epoxy resins. The adhesion in tension of self-levelling mortars using SBR latex and PAE emulsion at a curing age of 3 days exceeded 1.67 MPa. It was noted that the consistency change is strongly dependent on the type of polymer dispersion. It is concluded that self-levelling mortars with  polymer dispersions can be used in the same manner as conventional floor-finishing materials using thermosetting resin in practical applications.   17 refs.

Primary author(s): Do J; Soh Y

                            Chonbuk,National University

Source: Cem.Concr.Res.

            33,No.10,2003,p.1497-1505


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