Stabilization of clay soils in the optimization of urban subgrade using common glass, Tarma-Peru

Abstract

The present study aimed to analyze the stabilization of clay soils for the optimization of urban subgrades through the use of common glass in the province of Tarma, Peru. An experimental design methodology was employed, with 5 test pits excavated for soil extraction. Recycled glass was used, ground, and added in varying percentages of 0%, 10%, 20%, 30%, and 60%. An observation sheet was used to record all relevant data. The results indicated that the SiO2 content in the glass was 71.166% and the CaO content was 25.683%, with Si (53.355%) and Ca (41.355%) being the predominant elements. Regarding Maximum Dry Density (MDD), the highest value was recorded with the addition of 20% ground glass (1.987 g/cm3). Additionally, the Optimum Moisture Content (OMC) decreased as the percentage of added glass increased. Concerning the California Bearing Ratio (CBR) at 100% of the MDD, the maximum value was observed with 20% glass addition (17.8%), indicating that the subgrade is of good quality. Finally, the ANOVA analysis showed an F-statistic value of 267.1722 and a p-value of 0.00, suggesting statistically significant differences between the groups with different percentages of glass addition. It was concluded that the addition of ground glass improves the density and moisture providing an effective solution for the stabilization of clay soils in terms of sustainability and performance.