Utilização do resíduo da indústria de calçados (EVA - Etileno Acetato de Vinila) como agregado leve na produção de blocos vazados de concreto para alvenaria sem função estrutural.

Abstract

The development in the industry, normally, has an effect in the environment due to the production of waste. Latterly, the amount of waste produced by the footwear industry has increase enormously and it has a close relationship with the economical growth. The destination given to the waste from the footwear industry is the so called clandestine sanitary fills. On the other hand, in the civil construction works has a great potential to make use of the waste from industries, which will give a contribution the better environment condition. This investigation aims to present the technical conditions for the use of footwear waste (EVA - ethylene vinyl acetate) as light aggregate in the production of concrete blocks for the use for non-structural means and based in the cementiceous properties. The objective is to offer a right ecological alternative for the final destination of that waste mentioned above. To reach this purpose, a preliminary study was done by the introduction of waste as light aggregate in mixtures ranging from 40% to 100% in relation to the total volume of aggregate aiming to find an ideal amount of waste to be used. The waste was grounded in a knife mill in order to produce several grain sizes, thermical treatment and wetting in water of the particles. Finally, a unconfined compressive tests were done as well as the absorption of water by the blocks was measured. It was observed that, in a general way, with a mixture of 1:3 (Portland cement: aggregates, in volume) is possible to obtain good condition for making the blocks without leaving them very weak to be work with. The ideal amount of incorporated waste from the footwear industry is 60% when they're no thermical treatment and 70% when there is a treatment reaching unconfined compressive strength of 2,53 MPa.