Effect of nano-Si2O and nano-Al2O3 on cement mortars for use in agriculture and livestock production

León Brito, Nestor; Massana Guitart, Jordi; Alonso Peralta, Francisco; Moragues Terrades, Amparo y Sanchez Espinosa, Elvira (2014). Effect of nano-Si2O and nano-Al2O3 on cement mortars for use in agriculture and livestock production. "Biosystems Engineering", v. 123 ; pp. 1-11. ISSN 1537-5110. https://doi.org/10.1016/j.biosystemseng.2014.04.009.

Descripción

Título: Effect of nano-Si2O and nano-Al2O3 on cement mortars for use in agriculture and livestock production
Autor/es:
  • León Brito, Nestor
  • Massana Guitart, Jordi
  • Alonso Peralta, Francisco
  • Moragues Terrades, Amparo
  • Sanchez Espinosa, Elvira
Tipo de Documento: Artículo
Título de Revista/Publicación: Biosystems Engineering
Fecha: Julio 2014
Volumen: 123
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Ingeniería Agroforestal
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The effect of nano-silica, nano-alumina and binary combinations on surface hardness, resistance to abrasion and freeze-thaw cycle resistance in cement mortars was investigated. The Vickers hardness, the Los Angeles coefficient (LA) and the loss of mass in each of the freeze–thaw cycles to which the samples were subjected were measured. Four cement mortars CEM I 52.5R were prepared, one as control, and the other three with the additions: 5% nano-Si, 5% nano-Al and mix 2.5% n-Si and 2.5% n-Al. Mortars were tested at 7, 28 and 90 d of curing to determine compression strength, total porosity and pore distribution by mercury intrusion porosimetry (MIP) and the relationship between the CSH gel and Portlandite total by thermal gravimetric analysis (TGA). The capillary suction coefficient and an analysis by a scanning electron microscope (SEM) was made. There was a large increase in Vickers surface hardness for 5% n-Si mortar and a slight increase in resistance to abrasion. No significant difference was found between the mortars with nano-particles, whose LA was about 10.8, classifying them as materials with good resistance to abrasion. The microstructure shows that the addition of n-Si in mortars refines their porous matrix, increases the amount of hydrated gels and generates significant changes in both Portlandite and Ettringite. This produced a significant improvement in freeze–thaw cycle resistance. The effect of n-Al on mortar was null or negative with respect to freeze–thaw cycle resistance.

Más información

ID de Registro: 41410
Identificador DC: http://oa.upm.es/41410/
Identificador OAI: oai:oa.upm.es:41410
Identificador DOI: 10.1016/j.biosystemseng.2014.04.009
URL Oficial: http://www.sciencedirect.com/science/article/pii/S1537511014000646
Depositado por: Memoria Investigacion
Depositado el: 23 Jun 2016 17:14
Ultima Modificación: 31 Jul 2016 22:30
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