Study on Durability of Styrene-acrylic Emulsion Modified Mortar

Abstract

By using the orthogonal experiment design method, the optimum mix ratio of polymer modified mortar was selected, the influence regularity of polymer dosage on the durability of modified mortar was studied, and the modification mechanism of polymer was analyzed. The experimental results show that the larger the polymer content, the smaller the water absorption rate of modified mortar, the stronger the frost resistance, the lower the quality and strength loss of the modified mortar after 100 times freeze-thaw cycle. The permeability pressure of the modified mortar increases gradually with the increase of polymer content, and the depth of carbonation becomes shallow. The durability of polymer-modified mortar is best when the ratio of ash to sand is 0.375, the ratio of poly to ash is 13%, and water cement ratio is 0.38.