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

León Brito, Nestor and Massana Guitart, Jordi and Alonso Peralta, Francisco and Moragues Terrades, Amparo and 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.

Description

Title: Effect of nano-Si2O and nano-Al2O3 on cement mortars for use in agriculture and livestock production
Author/s:
  • León Brito, Nestor
  • Massana Guitart, Jordi
  • Alonso Peralta, Francisco
  • Moragues Terrades, Amparo
  • Sanchez Espinosa, Elvira
Item Type: Article
Título de Revista/Publicación: Biosystems Engineering
Date: July 2014
ISSN: 1537-5110
Volume: 123
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Ingeniería Agroforestal
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainBIA2009-14395-C04-04UnspecifiedUnspecifiedUnspecified
Government of SpainC14/2006UnspecifiedUnspecifiedUnspecified
Government of SpainC01/2007UnspecifiedUnspecifiedUnspecified

More information

Item ID: 41410
DC Identifier: http://oa.upm.es/41410/
OAI Identifier: oai:oa.upm.es:41410
DOI: 10.1016/j.biosystemseng.2014.04.009
Official URL: http://www.sciencedirect.com/science/article/pii/S1537511014000646
Deposited by: Memoria Investigacion
Deposited on: 23 Jun 2016 17:14
Last Modified: 13 Jun 2019 07:11
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