Avaliação do comportamento de argamassas de revestimento com incorporação de pó de borracha de pneu

Abstract

The study analyzed the incorporation of different percentages of rubber tire poder into cement matrices, bringing the residue as a new component of coating mortars. For the production of mortars was used.a mix proportion of 1: 4 (binder:fine aggregate) in volume with w / c = 1,73. The percentages of substitution in volume of the fine aggregate per rubber powder were set at 5%, 15% and 30%. In order to evaluate the performance of the mortars, analyzes of some properties in the fresh state (water retention, consistency index, mass density and incorporated air content) and in the hardened state (tensile strength in flexion, resistance to axial compression and absorption of water by capillarity). On the other hand, the increase of tire rubber powder was efficient in reducing the water absorption of mortars. At the control age of 28 days, the tests showed decreasing values of absorption with the increase of the percentage of rubber in the mixtures. By means of the results obtained, it is concluded that the introduction of tire rubber powder into mortars is feasible for coating purposes in civil construction.