Granulometria de solos lateríticos: metodologia, efeitos das energias térmica e mecânica e relação com a composição química e mineralógica.

Abstract

This work presents, for sixteen lateritic soils in the North and Northeast of Brazil, the results of the study of the granulometry of these soils, evaluating the methodology used and the effects of inducing thermal and mechanical energy levels, and the relationship between particle size distribution with chemical and mineralogical composition. The results obtained showed that the methodology of The evaluated test, with the modifications introduced in the original method recommended by British Standard BS 1377: 1975, was acceptable, as it presented a narrow range of variation. Regarding the induction of thermal and mechanical energy levels, the results showed that: i) The particle size distribution is little affected by the induction of thermal energy, with tendency for aggregation of soil particles. i) The particle size distribution is affected by the induction of mechanical energy, with breakdown / degradation of soil particles. i i i) The combined effect of thermal and mechanical energies predominance of mechanical energy in the granulometric distribution. iv) No clear relationship was found between the effects thermal and mechanical energies and chemical and mining composition logic in the granulometric distribution.