Estudio del efecto de la ceniza de cáscara de arroz en las propiedades físico-mecánicas en suelos finos de subrasante

Abstract

This project focused on knowing the effect that rice husk ash can produce on the physical-mechanical properties of subgrade soil. In this study, soils were taken from three different places from Puyo, in order to carry out a comparative analysis of the CBR values between the natural soil and the soil stabilized with rice husk ash. In situ essays were carried out such as: Open Excavation and Field Density (Ottawa´s Cone and Sand Method) and laboratory tests such as: Moisture Content, Granulometry, Specific Gravity, Atterberg Limits, Modified Proctor and CBR. When the modified Proctor and CBR tests were carried out, soil samples were mixed with rice husk ash were used in percentages of 0, 1, 3, 5 and 8. When obtaining the CBR values were obtained, a comparison was made between two flexible pavement designs, the first design was with the CBR value of natural soil and the second design was with the CBR value of stabilized soil. When we obtained the thicknesses of the layers of the flexible pavement, the design with stabilized soil, a decrease in the thickness was obtained. At the end of the designs, an economic analysis was also made, to find out how rice husk ash influences the cost of a road.