DANTAS JÚNIOR, C. M.; http://lattes.cnpq.br/7486500899404590; DANTAS JÚNIOR, Clóvis de Medeiros.
Résumé:
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.
