Influencia del sulfato de calcio en la estabilización de dos tipos específicos de suelo: arenoso y limoso

This research analyzed the influence of calcium sulfate (agricultural gypsum) on the stabilization of two specific types of soil found in the Ambato canton: a silty soil extracted from the Constantino Fernández parish (M1) and a sandy soil extracted from the Pishilata parish (M2). This study arose from the need to improve the bearing capacity of soils with low mechanical performance, which constitute a problem in road and civil infrastructure projects. The purpose of the research was to determine whether the incorporation of calcium sulfate improves the physical and mechanical properties of these soils through laboratory tests. The study was structured in three phases. During the first phase, both soils were characterized under natural conditions through moisture, granulometry, Atterberg limits, Modified Proctor, and CBR tests. In the second phase, samples were prepared with three doses of calcium sulfate (3%, 6%, and 9%) to establish the optimal percentage of the additive. The third stage consisted of a comparative analysis between natural and stabilized conditions. The results revealed clearly differentiated behaviors. Soil M1, classified as ML (SUCS) and A-4 (AASHTO), experienced progressive improvements as the additive were increased. With a dosage of 9%, it reached a CBR of 31%, a value considerably higher than the 17.30% recorded in its natural state. On the other hand, soil M2, classified as SW and A-3, showed a non-linear response: its maximum performance was obtained with 5% calcium sulfate, reaching 21% CBR compared to the initial 10.80%. Higher doses generated counterproductive effects. In general terms, the research showed that calcium sulfate improves the physical and mechanical properties of the two soils analyzed, being more efficient in fine soils due to its greater interaction with the additive. The differences observed confirm that each type of soil responds in a particular way, so the selection of the dose must be specific to each case.

• 1. Verfasser: Saqui Palate Miguel Alejandro (author)
• Format: bachelorThesis
• Veröffentlicht: 2026
• Schlagworte: SULFATO DE CALCIO; ESTABILIZACIÓN; PROPIEDADES FÍSICAS Y MECÁNICAS
• Online Zugang: https://repositorio.uta.edu.ec/handle/123456789/46462