SOIL STABILIZATION USING ARTIFICIAL CALCINED CLAY AGGREGATE

摘要

The lack of natural aggregates in some portions of the Brazilian territory, particularly in Amazon region, considerably increases the road construction costs at these areas. In that way, a major interest research subject is the artificial calcined clay aggregate developed by the Military Institute of Engineering - IME. Many federal roads at these regions are not yet paved due to a prohibitive natural aggregate transportation cost. The main benefit of road constructions at such isolated areas is the improvement of accessibility which contributes significantly to economic growth and regional development. This article studied the behavior of a tropical soil stabilized with artificial calcined clay aggregate as a soil-aggregate mixture for road construction. The adoption of this kind of solution improves the CBR - California Bearing Ratio - and the RM - Resiliant Modulus of the natural soil and will be used as the pavement base of an experimental track for future studies. With the construction of an experimental track, structural performance evaluation, regarding the stabilized soil in road paving, can be done and will be possible to understand the pavement behavior in a real situation based on modern pavement mechanics theories, taking into account the elastic responses when the layered structure is subjected to dynamic loads and compared to the lab results of this paper. The tropical soil analised was stabilized with artificial calcined clay aggregate as a soilaggregate mixture in proportions of 30 %, 50 % and 70 % in mass, compacted in modified energy. These results have also been compared with another soil-aggregate mixture, using the same proportions and compaction energy, but employing other aggregate.