Reduction of the calcium leaching rate of cement paste by addition of silica nanoparticles

Gaitero Redondo, Juan José; Campillo, Igor y Guerrero Bustos, Ana (2008). Reduction of the calcium leaching rate of cement paste by addition of silica nanoparticles. "Cement and Concrete Research", v. 38 (n. 8-9); pp. 1112-1118. ISSN 0008-8846. https://doi.org/10.1016/j.cemconres.2008.03.021.

Descripción

Título: Reduction of the calcium leaching rate of cement paste by addition of silica nanoparticles
Autor/es:
  • Gaitero Redondo, Juan José
  • Campillo, Igor
  • Guerrero Bustos, Ana
Tipo de Documento: Artículo
Título de Revista/Publicación: Cement and Concrete Research
Fecha: Enero 2008
Volumen: 38
Materias:
Palabras Clave Informales: B: Calcium silicate hydrate (C–S–H), Portlandite, Characterization, C: Calcium leaching, D: Nanosilica
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ingeniería Civil: Construcción
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Calcium leaching is a degradation process that consists in the progressive dissolution of the cement paste as a consequence of the migration of the calcium ions to the aggressive solution. Although it is a well known phenomenon, a way of reducing it has not been found yet. The aim of this work is to prove how the addition of small amounts of silica nanoparticles to the cement paste can induce such reduction. The experimental results obtained have shown that nanosilica increases the strength of the cement paste about a 30% in cured samples and more than a 100% in the asymptotically leached ones. At the level of the structure of the C–S–H gel, silica nanoparticles increase the average length of the silicate chains and reduce their polymerization as calcium dissolves. An important decrease of the degradation in terms of porosity and amount of calcium lost has also been observed.

Más información

ID de Registro: 2893
Identificador DC: http://oa.upm.es/2893/
Identificador OAI: oai:oa.upm.es:2893
Identificador DOI: 10.1016/j.cemconres.2008.03.021
URL Oficial: http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235562%232008%23999619991%23692523%23FLA%23&_cdi=5562&_pubType=J&_auth=y&_acct=C000047350&_version=1&_urlVersion=0&_userid=885385&md5=72b2b26d391b2a0d865b4baead6a817a
Depositado por: Memoria Investigacion
Depositado el: 26 Abr 2010 11:18
Ultima Modificación: 20 Abr 2016 12:31
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