Análisis comparativo del material proveniente de las canteras “Mollepamba”, “Rubí 2” y cantera Rumipamba de la provincia de Cotopaxi utilizado para la elaboración de base y subbase en la construcción de carreteras

Abstract

The comparative analysis of the material coming from the quarries “Mollepamba”, “Rubí 2” and “Rumipamba” in the province of Cotopaxi, Ecuador, was carried out due to several problems in the roads surrounding the sector that presented structural deficiencies in the granular base and subbase materials, producing subsidence, fissures, cracks among other problems that affect the trafficability and safety of the roads. The research analyzed the index and mechanical properties of the quarry materials through various laboratory tests to determine if they comply with the Ecuadorian road standard NEVI -12. The moisture content, Atterberg limits, granulometry, maximum density and bearing capacity (CBR) were evaluated. In addition, abrasion resistance, percentage of fractured faces and sulfate wear were tested to determine durability and wear resistance. The test results were compared between the three quarries to identify the suitability of the materials for base and subbase applications. The results show that the materials from the Mollepamba quarry met all the requirements of the Ecuadorian road standard NEVI-12, proving that they are suitable for use in road construction. The materials from the Rumipamba and Rubí 2 quarries comply with most of the parameters evaluated, indicating their good quality. These results emphasize the importance of carrying out thorough evaluations of the materials before using them in road projects.