Effect of Redispersible Latex Powder and Fly Ash on Properties of Mortar

Abstract

In this paper, fly ash is mixed into self-flowing cement mortar by the method of equal mass substitution of cement, and the redispersible latex powder is mixed into cement mortar according to the percentage of cementitious material mass, so as to study the influence on the properties and mechanical properties of cement mortar. The test results show that the incorporation of fly ash prolongs the setting time of cement mortar and reduces the flexural strength, compressive strength, and drying shrinkage. With the increase in the content of redispersible latex powder, the setting time of cement mortar increases gradually, the compressive strength and compressive fracture resistance then decrease gradually, and the flexibility and crack resistance of the cement mortar specimen are improved. The flexural strength of the cement mortar specimen first increased and then decreased, and the drying shrinkage first decreased and then increased, indicating that the mixing amount of redispersible latex powder is not the more the better, but that there is a reasonable range to achieve the best comprehensive performance of cement mortar.