Abstract

Previous studies of the influence of texture, grain size distribution and mineralogy on the stability of materials used in pavement bases have shown that the mechanical behavior of lateritic soils is strongly influenced by their physical and mineralogical properties, as demonstrated by literature review researches and by the analysis of observations and knowledge gathered in Africa, as well as regional experience from Brazil, India and Australia. Development of new procedures for the classification of these soils as new building materials, that consider designs appropriate for humid tropical environments, the nature and state parameters associated with mechanical behaviour, can broaden the use of a higher percentage of local soils in pavement layers for low cost roads compared to traditional techniques.