Uso de materiales pétreos modificados para mejorar la estructura de vías urbanas en lastre del cantón de Cuenca

Abstract

This work contemplates the experimental study of the use of the oil used by the city's automotive fleet, as a stabilizer of the ballast extracted from the Chocarsi municipal mine, used by the municipal GAD in the maintenance of unpaved urban roads in the Cuenca canton. The soil tests carried out were: Atterberg limits, granulometry, modified proctor, and CBR with and without the addition of used oil, the oil used replaces a percentage of the optimum volume of water determined in the modified proctor test. With the tests it was possible to determine that the stabilization of ballast with residual oil gave positive results with 3% and 4% in volume of replacement of oil by water, there was an improvement of the CBR value up to 14.69%. A pilot test was carried out on Beethoven Street located to the south of the city, in a section of 104 x 6.5 meters, which consisted of placing a layer of 0.1 meters of modified ballast in the first 40 meters of the section and comparing its behavior with the last 44 meters where unmodified ballast was placed. Their behavior was monitored for a period of three months, using field densities, CBRs by correlation using the dynamic cone of penetration, leveling of longitudinal alignments, and sampling of the percentage of potholes. It was observed that the values of the CBRs, and humidity, in the modified ballast were more favorable than in the section with conventional ballast; in the leveling of the longitudinal alignments, it was found that in the section where modified ballast was placed, there was a smaller decrease in the levels of the rolling surface, which indicates a smaller detachment of material.