This paper is directed to forest road engineering applications, and address the potentialities of using an industrial solid waste from the cellulose industry, named grits, in the stabilization process of two soils from Zona da Mata Norte of Minas Gerais States, Brazil. Soil types tested comprised a mature residual silty-sandy-clay and a young residual clayey-silty-sand. Soil-grits mixtures were prepared at 4, 8, 12, 16, 20, 24 and 28 % stabilizer contents referred to soil dry masses. Mechanical strength and swelling parameters were determined by CBR (California Bearing Ratio) tests. The laboratory testing program data supported that addition of grits to soils led to: (i) significant mechanical strength gains that could be better associated with the clayey-silty-sandy soil; (ii) increases and decreases in swelling with increases in grits contents referred to the silty-sandy-clayey and the clayey-silty-sandy soils respectively, and (iii) increase in compaction effort did not lead to better mechanical responses of the mixtures regarding CBR and swellingCBR.
Soils; stabilization; industrial waste grits; forest roads
