Utilização de resíduos de quartzito para aplicação em pavimentos intertravados.

Abstract

Studies show that residues from the extraction and processing of quartzites can be substitutes for the conventional raw materials used in civil construction because they have similar properties to them after they have undergone process of processing that leave them in the granulometry of the natural aggregates. The increasing exploration of the quartzite rocks in the municipality of Várzea / PB leads to the search for solutions that promote the correct destination of the residues generated in this process. Due to the properties of this material, we can see a good advantage of the residues in the use of interlocking pavements, which are produced with precast concrete pieces in its coating, where the quartzite residues act as a substitute for the conventional aggregates in the pieces. In this perspective, the present work aims to produce precast concrete pieces with a resistance to simple compression similar to the pieces produced with conventional materials and subject them to the study of durability. The quartzite residues were collected randomly around the deposits in the municipality of Várzea / PB, then benefited, through the crushing, grinding and sieving processes. Subsequently, the chemical, physical and mineralogical characterization of the aggregate from the residues was carried out. Soon after, the pieces with these residues were made and submitted to the study of the resistance to simple compression. The results showed similarity between the two types of pieces, the blocks made with the residues presented a lighter coloration than those with the conventional materials and the blocks manufactured with fine grains in a certain quantity obtained better mechanical behavior, suitable for use in pedestrian traffic sidewalks.