Mejoramiento de suelos mediante sustitución química: Estudio de caso de la autopista Azogues - El Descanso (Ecuador)

Ana Paulina Ortiz Viñán; Juan Carlos  Guanín Vásquez

doi:10.31637/epsir-2025-1233

Authors

Ana Paulina Ortiz Viñán Universidad Técnica Particular de Loja https://orcid.org/0000-0002-6767-403X
Juan Guanín-Vásquez Universidad Técnica Particular de Loja https://orcid.org/0000-0002-8451-5209

DOI:

https://doi.org/10.31637/epsir-2025-1233

Keywords:

volumetric changes, calcium hydroxide, C. McDowell abacus, compression, direct cut, stabilization, soil resistance, expansive soils

Abstract

Introduction: Expansive clays undergo volume changes due to variations in their moisture acquired by capillarity and/or infiltration. Some buildings founded on expansive clay strata experience constant volumetric changes. Methodology: A method of chemical stabilization is applied to altered and unaltered soil samples obtained in the sector of the Autopista Azogues-El Descanso, by replacing the soil with various percentages of lime hydroxide obtained from the abacus proposed by Charles McDowell, based on the plasticity index and the percentage of soil passing through sieve No. 40 by wet method. Results: The results of tests applied to the natural soil classify it as inorganic clays of high plasticity, expansive type CH, to which 3% of lime hydroxide obtained from Charles McDowell’s abacus was added; this modified soil underwent defined physical and chemical transformations of the characterization, being reclassified as organic loamy soil type ML. Discussion: The percentage of lime hydroxide added to the soil causes a reduction in plasticity and improves its behavior, due to the new silicates and calcium aluminates generated by the substitution. Conclusions: The soil stabilized with 3% lime hydroxide is characterized by an increase in shear strength and compressive resistance.

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Author Biographies

Ana Paulina Ortiz Viñán, Universidad Técnica Particular de Loja

Civil Engineer, 1999, Master in Road Engineering, 2017. Has held positions in public institutions: Technician at the Municipality of Zamora Canton, 2000-2001; Technician at QUIPAEN Construction, 2002; Civil Works Inspector at the Provincial Council of Loja, 2003-2005; Technician at the Municipal Transit Unit of Loja, 2005-2010; Head of the Municipal Transit Unit, 2010-2014; Technician at Municipal Public Works, 2015. Research Professor at the Department of Civil Engineering of the Technical University of Loja since October 2015 to the present, has taught several subjects such as: Strength of Materials, Structures, Concrete, Construction Technology, Topography, Statics

Juan Guanín-Vásquez, Universidad Técnica Particular de Loja

Master of Science from the University of Granada, Spain. Mining Engineer graduated from the National University of Loja. Full-time professor at UTPL. Has taught courses in Mining Fundamentals, Rock Blasting: Mining Exploitation. Member of the research group: Mining Metallurgical Research and Processes of the Department of Geosciences. Training at the Catholic Education Congress “Teaching is an Act of Hope.” IV Research and Innovation Meeting 2021 – PUCE. Recognition for the poster was one of the most voted. Type of recognition: research. Type of award: Local.

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