Nonferrous waste foundry sand and milling fly ash as alternative low mechanical strength materials for construction industry: effect on mortars at early ages

Vázquez Rodríguez, Francisco Javier y Valadez Ramos, Jaime Elihezer y Puente Ornelas, R. y Contreras, J. E. y Arato, A. y RodrÍguez Castellano, Edén Amaral (2018) Nonferrous waste foundry sand and milling fly ash as alternative low mechanical strength materials for construction industry: effect on mortars at early ages. Revista Română de Materiale / Romanian Journal of Materials, 3 (48). pp. 338-345. ISSN 2457-502X

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Resumen

An alternative solution to reduce environmental pollution using aluminum waste foundry sand (AWFS) and fly ash (FA) to produce sustainable construction materials was studied. New mortars were prepared by partially replacing ordinary Portland cement with fly ash at 5, 10 and 15 % mass. and a total replace of Ottawa sand (OS) with AWFS. The specimens were cured at 25°C with a 100% relative humidity. The mechanical behavior was evaluated by compression test at the ages of 7, 14 and 28 days. The microstructural characteristics were analyzed by scanning electron microscopy (SEM). The results indicate that the addition of milling fly ash in AWFS mortars increases the mechanical resistance, mostly at 5% mass reaching the maximum value of 10 MPa at 28 days of age. Microstructurally, it was found a porous cement matrix with some cracking caused by the reaction of portland cement with the metallic aluminum remaining in the waste sand, which is correlated to the low mechanical resistance obtained. The final mechanical characteristic makes this new product a serious candidate to be used as a sustainable building material working at low load.

Tipo de elemento: Article
Materias: T Tecnología > TA Ingeniería General y Civil
Divisiones: Ingeniería Mecánica y Eléctrica
Usuario depositante: Editor Repositorio
Creadores:
CreadorEmailORCID
Vázquez Rodríguez, Francisco JavierNO ESPECIFICADONO ESPECIFICADO
Valadez Ramos, Jaime ElihezerNO ESPECIFICADONO ESPECIFICADO
Puente Ornelas, R.NO ESPECIFICADONO ESPECIFICADO
Contreras, J. E.NO ESPECIFICADONO ESPECIFICADO
Arato, A.NO ESPECIFICADONO ESPECIFICADO
RodrÍguez Castellano, Edén AmaralNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 27 Oct 2021 20:33
Última modificación: 27 Oct 2021 20:33
URI: http://eprints.uanl.mx/id/eprint/22395

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