Abstract
This paper deals with the reaction to the fire tests of polymer-modified mortars, which are performed according to ISO 5660 and ISO 1182. Polymer-modified mortars using a styrene-butadiene rubber (SBR) latex, poly(ethylene-vinyl acetate)(EVA) and polyacrylic ester (PAE) emulsions are prepared with polymer-cement ratios of 0, 5, 10, 15 and 20%, and tested for fire-protecting performance in accordance with ISO 5660 and ISO 1182. As a result, all the polymer-modified mortars with polymer-cement ratios of 5 and 10% are acceptable as noncombustible materials. Gradings for fire-preventive materials by both ISO 5660 and ISO 1182 tests of the polymer-modified mortars are almost the same. Drying in a drying oven for the polymer-modified mortars before the fire tests brings about the appropriate evaluation of their fire-protecting performance, and the noncombustibility depends largely in the polymer type and the polymer-cement ratio. From the test results, the authors propose the fire-protecting performance test methods for polymer-modified mortars for buildings.
