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International Journal of Engineering & Technology Sciences
IJETS 2025, 9 pages - Article ID: IJETS-2502192112937
Nanosilica: The Secret Ingredient for Enhanced Concrete Durability
Authors
Natali Elizabeth Lascano Robalino a,
Edwin Iván Soledispa Pereira b,
Jorge Oswaldo Crespo Bravo c,
Jorge Alexander Bucheli García c,d,
Marcelo Fabian Oleas Escalante e,
Jimenez Merchan Carmita Guadalupe e,
Angel Mauricio Espinoza Cotera e,
Byron Giovanoli Heredia Ayala c
Faculty of Engineering and Applied Sciences, Information Systems Department, Central University of Ecuador, Av. Universitaria, Quito 170521, Ecuador
TERMINAL PORTUARIO DE MANTA, 130802, Manta, Ecuador
Faculty of Engineering and Applied Sciences, Civil Engineering Department, Central University of Ecuador, Av. Universitaria, Quito 170521, Ecuador
Pontifical Catholic University of Ecuador, Department of Civil Engineering, Quito - Ecuador
Faculty of Engineering, Industrial and Architecture, School of Civil Engineering, Laica Eloy Alfaro de Manabi University, Manta, Ecuador
ABSTRACT
This work compiles a series of investigations on the use of nanosilica (NS) as an additive in concrete, evaluating its impact on mechanical properties, durability, workability and sustainability. The studies consider the incorporation of NS in various proportions (0.4%-3%) and its combination with other additives such as microsilica and superplasticizers, using methodologies based on international standards (ACI, ASTM). The results show that NS significantly increases compressive strength (up to 56.92%) and flexural strength, improves impermeability and durability against aggressive environments, such as coastal and sulfated areas, by reducing the porosity of concrete. It is also observed that it optimizes workability in fresh mixtures, being ideal for self-compacting concretes. However, proportions above 1.5% can have adverse effects on cohesion and mechanical behavior. In terms of sustainability, the use of NS makes it possible to reduce the amount of cement needed, decreasing the carbon footprint of the material, and is considered economically viable in projects that prioritize durability and high resistance.
Nano silica (NS); high-strength concrete; mechanical properties; concrete durability; permeability; workability; self-compacting concrete; nanomodified materials; innovation in construction.