Evaluación superficial y de la estructura del pavimento de la vía Quero – Mocha abscisa 4+300 - 8+600, ubicada entre los cantones Quero y Mocha de la provincia de Tungurahua

Abstract

The significance of the Quero-Mocha road lies in its crucial role connecting two cantons with prominent agricultural production in the Tungurahua province. Activities such as traffic counting and a thorough analysis of the subgrade and granular material, accompanied by a detailed evaluation of the pavement layer, were carried out in this context. A quantitative, qualitative, and descriptive methodology guided by ASTM, AASHTO, MTOP standards was employed. Data on both surface and structural deficiencies were collected through laboratory and field studies, including activities such as TPDA, surface deflection revealing acceptable behavior. Using the PCI method, the need for periodic maintenance, rehabilitation, and reconstruction on the road was determined. The DCP test with a field CBR of 21.055 percent was conducted. Soil samples were extracted through pits every kilometer along the road. Results unveiled that the subgrade consists of non-plastic fine sand A-3, and the granular material features a composition of rock fragments, gravel, and sand A-1-b, both classified as excellent too good. A CBR of 24.15 percent was obtained for the subgrade, crucial data for generating the maintenance plan. As a result, a maintenance plan was devised to ensure the optimal condition of the road, with a reference budget of $462,218.55. Laboratory analyses identified the road materials, considered to optimize construction costs.