Improving geotechnical properties of a sand-clay soil by cement stabilization for base course in forest roads

Emmert Fabiano, Sergio Pereira Reginaldo, Pereira Miguel Eder, Conceicao Menez Mota Fabricia, Angelo Humberto, Teixeira do Vale Ailton, Paula Oliveira Machado Mayara, Eloi Nappo Mauro, Soares Martins Ildeu
2017 African Journal of Agricultural Research  
The study evaluated the chemical stabilization of soils with cement toward application in improving forest roads, as constructive alternative of low cost. The study was carried out with fine soils from the region of Niquelândia-GO, where the sand-clay-silt particle proportion was predominant, and Portland cement CP-II-Z-32 used as a stabilizing agent at 2% under dry soil weight. Geotechnical tests were conducted in different compaction energies (normal, intermediate and modified) and curing
more » ... ods (1, 7 and 28 days), and the data were analyzed statistically by Analysis of Variance (ANOVA) and Tukey test. The soil-cement mixture presented higher unconfined compressive strength (UCS) than the compacted local soil, reaching a highest value of 650.52 kPa on modified compaction energy. Also, California bearing ratio (CBR) with values of 44.1% in the intermediate compaction energy and 41.7% in the modified compaction energy reached higher values compared to lateritic soil sampled. Soil-cement mixture was prescribed as improved layer for forest road surface, as well as reached indication for subgrade reinforcement material and sub-base in conventional paved roads.
doi:10.5897/ajar2016.12482 fatcat:54o2ltnfkfegzfud5bm75tjc3y