This paper addresses the influence of size distribution of the industrial waste named grits on the optimum compaction parameters, mechanical strength and swelling of two typical soils from the North Forest Zone of Minas Gerais State, Brazil, for forest road applications. Specimens compacted at the intermediate and modified Proctor compaction effort and waste contents of 4, 8, 12, 16, 20, 24 and 28 % regarding soil dry unit weights were used throughout the study. Waste sizes analyzed in the laboratory testing program were those equivalent to clay (d < 0.074 mm), silt (0.074 < d < 2 mm), sand (d > 2 mm) and gravel (2 mm < d < 76 mm) sizes in accordance to the DNIT technical standard (DNIT, 1996). Soils and mixtures bearing capacity and swelling were evaluated by the CBR test. Data from the laboratory testing program support that the waste's clay and gravel size portions were responsible, respectively, for higher and lower increases in soils bearing capacity.
Soil stabilization; industrial grits waste; grain size distributions
