This paper deals with the adhesion or bond strength of polymer-modified mortars to ordinary cement mortar, which is tested by different methods, and the effects of polymer types and polymer-cement ratio on the adhesion. Polymer-modified mortars using a commercial styrene-butadiene rubber (SBR) latex, ethylene-vinyl acetate (EVA) emulsion and polyacrylic ester (PAE) emulsion are prepared with various polymer-cement ratios, and tested for adhesions in tension, flexure and compressive shear. Substrate used is a mortar with a ratio of cement to standard sand 1:2. The test results obtained are summarized as follows: (1)The adhesions in tension, flexure and direct compressive shear of the polymer-modified mortars increase with a raise in the polymer-cement ratio regardless of the types of polymers and specimens.(2)The adhesion in slant (indirect) compressive shear of the polymer-modified mortars reaches the maximum at a polymer-cement ratio of about 5%.(3)The failure mode distribution of the polymer-modified mortars remarkably depends on the test methods and polymer-cement ratio.(4)The adhesion test methods which can successfully reproduce service conditions in the practical applications of the polymer-modified mortars are recommended.
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- Adhesion of Polymer-Modified Mortars to Ordinary Cement Mortar by Different Test Methods
- Springer US
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