Part of #Effect of polymer latex on concrete/repair bond strength in harsh environment# :
Publishing year : 2009
Conference : Sixth International Congress of Chemical Engineering
Number of pages : 5
Abstract: The purpose of this study was to study the effect of polymer latex on concrete / repair bond strength under cyclic freeze-thaw and temperature changes. Styrene Butadiene Rubber (SBR) and acrylic polymer latexes were used as partial replacements for mixing water in a repair mortar. Concrete slabs of 600 X 300 X 100 mm were cast and after curing for 28 days, they were cut in such a way that each slab produced two sawn slabs with 600 X 300X 50mm dimensions. After repairing the sawed surfaces of these slabs by polymer modified repair mortars, they were exposed to cyclic freezing and thawing, and to very high and low temperatures. Subsequently, the specimens were tested for concrete / repair bond strength at the end of each cycle. Since the concrete / repair interface faces shear stresses during the cyclic freeze-thaw and temperature changes, the friction transfer method was used for bond strength evaluation. The corresponding results were compared with those of the ordinary sand / cement mortar, which had no polymer.