Mortar modified with sulfonated polystyrene produced from waste plastic cups
AbstractIn this work was studied the addition of sulfonated polystyrene produced from waste plastic cups as admixture for mortars. Mortars were analyzed with polystyrene content of 0.0; 0.2; 0.6; 1.0 and 1.4% in relation to the cement mass. The influence of polystyrene in the mortars properties was evaluated by consistency index, water retention, water absorption, porosity, elasticity modulus, compressive strength, flexural strength, bond tensile strength and microscopy. In relation to mortar without admixture, modified mortar showed increase in water retention and consistency index, besides great increase in flexural strength and bond tensile strength. However, the increase in the sulfonated polystyrene content decreased elasticity modulus of the mortar and despite higher porosity, there was reduction of water absorption by capillarity.