EFFECT OF EPOXY ADDITION ON THERMAL CONDUCTIVITY EXPANSION AND PERMEABILITY OF CEMENT MORTAR

Abstract

Ordinary construction materials have many advantage characteristic but also have some limitation such as porosity, moderate thermal insulation. It difficult to modified properties with keep low density. The aim of this work to enhance some insulation properties by the addition of polymer to mortar. Two sets of mixtures were prepared, that consist of mortar and polymer to fabricate the polymer-mortar composites. The first set was cured at room temperature and the other was post-cured at 50 ͦC for two hours. Both sets include mortar (cement-sand) without water. The selected polymer was epoxy which is added to the mortar using different percentages (15, 20, and 30%) by weight. The insulation effect of polymer addition on mortar was studied. The result showed that by adding polymer the density kept low and the lowest density obtained for post-cure at 30% the polymer which was (2022.2) kg/m3. The expansion of polymer–mortar composites was kept in limitation slandered and the lowest expansion was (0.032%) for 15% polymer. All percentages of the polymer prevent water penetration under high pressure to the concrete cube. The lowest thermal conductivity of polymer-mortar composites for post-cured at 30% which was (0.6146)W/m.k. The lowest velocity obtained was at room temperature for 15% of epoxy. It was concluded that the addition of polymer enhance the insulation properties especially waterproofing..