Polymer Latex Modified Mortar


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Title: Polymer Latex Modified Mortar

Author(s): Stamatia A. Frondistou-Yannas and Surendra P. Shah

Publication: Journal Proceedings

Volume: 69

Issue: 1

Appears on pages(s): 61-65

Keywords: admixtures; alkalinity; bonding: coatings;curing: durability: extensibility;latex (plastic); mortars (material);polymer-portland cement-concrete;repairs; strength: tensile strength; volume change.

Date: 1/1/1972

Polymer latex modified mortars are portland cement mortars to which polymer latex emulsions have been added during mixing. Mechanical and durability properties of modified mortars, the effects of curing history on modified mortars and latex films, and bond strength of modified mortar to plain mortar were studied. Siqnificant improvements were observed in extensibility, bonding properties, and durability of mortar. Hence, mortar modified by latex emulsion may be useful for surface coatings, pavement toppings, and patching of damaged concrete. Higher volume changes during wetting and drying, lower modulus of elasticity, and lower compressive strength were observed for modified mortars. Although continuous wet curing reduces the strength of modified mortars, subsequent drying increases their strengths. For polyvinyl acetate emulsions, this was partly explained by the performance of latex films in saturated lime solutions.