Estabilización de suelo mediante adición de ceniza de cáscara de huevo en las propiedades físicas y mecánicas de la vía

Abstract

This study analyzed soil stabilization through the incorporation of eggshell ash (ESA), a sustainable alternative aimed at improving the physical and mechanical properties of soils used as road subgrades. Two soil samples from different regions of Ecuador were evaluated: M1, collected from the parish of Montalvo (Tungurahua Province) and classified as silty sand, and M2, from the canton of Puyo (Pastaza Province), classified as clayey sand. Both samples underwent an experimental program that included natural condition testing as well as stabilization with 5%, 10%, and 15% ESA. Laboratory procedures consisted of moisture content determination, Atterberg limits, grain size distribution, Modified Proctor compaction, and CBR testing. The results demonstrated the positive effects of ESA as a stabilizing agent. For sample M1, the addition of 10% ESA increased the CBR from 26.2% to 37.6%, indicating a significant improvement in bearing capacity. For sample M2, naturally characterized by low dry density and high optimum moisture, the inclusion of ESA enhanced the compaction behavior and produced a notable increase in CBR compared with the untreated soil (from 11.60% to 24.50%). These findings confirm that eggshell ash is an efficient and environmentally friendly stabilizer capable of improving the performance of soils with different gradations and physical characteristics.