Improvement of access roads to agricultural areas using sediments from the clarification of irrigation water and industrial waste

Abstract

This research evaluates the effect of the addition of sediments from irrigation water clarification, rice husk ash (CCA), and calcareous scallop residue (RCCA) in the stabilization of sandy soils to improve access roads to agricultural areas. For this, the physical properties, microstructures, and phase analysis were determined by hydrometry, scanning electron microscopy, a nd Xray diffraction respectively. Five soil-sediment mixtures were evaluated at different percentages by means of the California Bearing Ratio (CBR) test. Then, to determine the best dosage of stabilizers on the best mixture obtained previously, 4 samples were tested at different proportions of CCA and RCCA by means of the CBR and triaxial compressive strength tests. The results showed that the mixture of 60% soil -40% sediment presents an increase in the CBR index of 42 compared to the natural soil (CBR of 6) and this mixture reaches a CBR index of 94 when 6% CCA and 1.5% RCCA are added. In addition, according to the Triaxial test, an undrained cohesion of 796.33 kPa was obtained. Finally, it is concluded that the soil-sediment combination showed an increa se of 57% in its support capacity when mixed with minimum percentages of CCA and RCCA, an increase in stiffness and undrained cohesion was also observed. The physical-chemical stabilization presented was applied in the design of the thickness of the rolling layer of the access roads to agricultural areas incorporated by the ChavimochicProject.