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Effects of Redispersible EVA and E/VL/VC Powders on Properties of Decorative Mortar

Redispersible polymer powders of Vinyl acetate / ethylene copolymer (EVA) and Ethylene/vinyl laurate/vinyl chloride copolymer (E/VL/VC) were applied to modify decorative mortar. Results showed that EVA and E/VL/VC both smoothed the surface of mortar, decreased the leachability of Ca2+, K+, Na+ ions and increased the leachability of SO42- in the surface leaching solution. However, with redispersible EVA and E/VL/VC being the same content, E/VL/VC-modified mortar hydrated for 1d showed lower bulk density, better surface hydrophobicity, higher alkalis leachability and more severe efflorescence. Moreover, EVA and E/VL/VC both had little influence on the components of efflorescence substances on the surface of mortar.