Estudo da viabilidade técnica de paver com resíduo de pneu em substituição parcial dos agregados

Abstract

Due to the world’s population and economical growth along the past few decades, there have been great concerns over the final destination of the residues generated by humanity. Old tires are among these residues, and are being produced in scales each time larger, which, along with its long degradation time, results on its accumulation in the environment .In order to revert the present scenario of overloaded landfills, many research have been made, whose primary goal is to find an adequate destination to these tires once they are no longer in use. This paper aims to evaluate the proprieties of concrete with embedded rubber residues on the production of concrete blocks for interlocked pavement. To develop this research, it was first calculated the reference trace, and chosen the percentage of substitution of aggregate for residue, being the utilized trace 1:1,72:2,15, factor a/c = 0,49, and the replacement percentages 3,88, 4,48% and 5,82% of the aggregate volume. The replacement was made mainly on the sand than on gravel 0, and the rubber fibers came to represent 2, 45%, 3, 07% and 3, 69% of the total concrete volume. In this research was made a characterization of the material, a study of the proprieties on fresh state (specific mass and concrete consistency) and evaluation of the proprieties on the hardened state (resistance to compression and water absorption), concluding that, the replacement of aggregate for rubber residues reduces the resistance to compression of concrete blocks ,so that these can only be used in places with light loading, which is not referenced on the standard referent to interlocked pavement.