Preparation and properties of an environment friendly polymer-modified waterproof mortar

摘要

A new type of environment friendly polymer-modified waterproof mortar (PMWM) was developed through adding ethylene vinyl acetate (EVA)/vinyl acetate-vinyl ester of versatic acid (Va-VeoVa) mixture (re-dispersible emulsion powder), mine tailings, quartz sand and additives to the eco-cement, which was prepared by grinding the mixture of steel slag, blast-furnace slag, fly ash and activator. The optimal material proportioning of PMWM was obtained based on the Orthogonal experiment: re-dispersible emulsion powder, 11 wt.%; cement-sand ratio, 1:3.5 (tailings/quartz sand - 1:3); EVA/Va-VeoVa ratio, 1:1; water reducing agent (based on the cement weight), 1.5 wt.%. The product conforms to JC/T 984-2005 (China professional standard: Polymer-cement waterproof mortar). Some factors influencing the characteristics of the mortar were discussed.