NFLUENCE OF NANOSILICA ADDITION ON CONCRETE PERMEABILITY

• Autores: Paula Nicole Dongo Gómez, Orlando Javier Saavedra Pérez
• Formato: artículo
• Fecha de Publicación: 2021
• Institución: Universidad Católica de Santa María
• Repositorio: Revistas - Universidad Católica de Santa María
• Lenguaje: español
• OAI Identifier: oai:ojs.revistas.ucsm.edu.pe:article/292
• Enlace del recurso: https://revistas.ucsm.edu.pe/ojs/index.php/veritas/article/view/292
• Nivel de acceso: acceso abierto
• Materia: Nanosilice; nanopartículas; coeficiente de permeabilidad del hormigón; proporción de agua a cemento; fuerza compresiva axial

In the present investigation, the influence of nanosilica addition on concrete permeability was analyzed in order to demonstrate that its use is convenient considering the present conditions in the city of Arequipa. Cylindrical concrete specimens of 15x30 cm were prepared, considering water/cement ratios of 0.60, 0.55 y 0.50, and nanosilica doses of 0.5% and 0.7%, in which the permeability coefficient (at 28 days of preparation) and the axial compressive strength (at 3, 7 and 28 days of preparation) were analyzed. The results evidence that, for a dosage of 0.5% additive, a reduction in the permeability of the concrete will be generated as the water/cement ratio decreases, while for a dosage of 0.7%, the permeability will be reduced up to a certain point and then increase. For both cases it is concluded that the more cement in the mix, the lesser the effect of the additive. The concrete mixes presented permeability coefficients in the order of 10^(-12) m/s and compressive strengths in the range of 300 to 485 kgf/cm2.