Estudio del efecto de la adición de emulsión asfáltica en las propiedades físico – mecánicas de suelos granulares, para el diseño de pavimentos flexibles

Abstract

In the present experimental investigation, an evaluation on the changes of the physicalmechanical properties of granular subgrade soils by adding asphalt emulsion in different percentages in order to stabilize the soils from Ambato was perfomed. To analyze these changes on soils´properties, samples have been taken from the parishes of Izamba, Montalvo and Juan Benigno Vela to carry out essays both in the field and on the laboratory to establish a comparative analysis of the achieved CBR values between the natural soil and the soil modified with asphalt emulsion; Furthermore, it was obtained Moisture Content, Field Density, Atterberg Limits, Specific Gravity, Granulometry and modified Proctor were obtained through laboratory essays. In addition to studying the changes in these properties, the results achieved for optimal humidity, maximum dry density and CBR of the modified samples were analyzed by adding asphalt emulsion at 0, 1, 3, 5 and 8 percent in order to establish the optimal percentage where the highest values of these properties are reached in the soils. With the data obtained, the design of flexible pavements for the soil in its natural state and the design for the stabilized soil were also been made with the propose to analyze and compare prices which are influenced by the thicknesses of each layer that are part of the pavement.