Estudo comparativo das características físicas e mecânicas de agregados graúdos convencional e não convencionais visando suas aplicações em concreto betuminoso usinado a quente.

Abstract

This research, which is part of a more comprehensive study on non conventional materials, aims to utilize coarse aggregates for bituminous mixtures and concrete of Portland cement. Previous studies carried out by several investigators, have shown thorough comparative studies the feasibility of calcareous, laterite and granite coarse aggregates for hot-mix bituminous concrete. The aggregates utilized in this research are avaluated in the laboratory by its physical and mechanical characteristics.As well as in samples of bituminous concrete with binder contents, as determined by Brasileiro (1983). Also, it has been verified variations on the absorption and specific gravity of coarse aggregates, before and after the compaction of samples for Marshall test. The laboratory test results concluds that, there are good perspectives to utilize lateritic and calcareous aggregates for hot-mix bituminous concrete. Further research is needed to find the best testing methodology in order to evaluate these materials, and to construct trial pavements to verify its field behaviour.