Effect of colloidal silica on the mechanical properties of fiber-cement reinforced with cellulosic fibers

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dc.contributor.authorSantos, Sergio Francisco [UNESP]
dc.contributor.authorRodrigues, Jose de Anchieta
dc.contributor.authorDenzin Tonoli, Gustavo Henrique
dc.contributor.authorFeuzicana de Souza Almeida, Alessandra Etuko
dc.contributor.authorSavastano, Holmer
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Federal de Lavras (UFLA)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2015-03-18T15:53:03Z
dc.date.available2015-03-18T15:53:03Z
dc.date.issued2014-11-01
dc.description.abstractThe effect of colloidal silica on the hydration reaction of the Portland cement system and its effect on the resulting mechanical properties are not completely understood. Silica nanoparticles can affect the behavior and performance of fiber-cement, such as the calcium-silicate-hydrate gel of the matrix and the fiber-matrix interface bonding. The main objective of this study is to evaluate the effects of various contents of colloidal silica (0, 1.5, 3, 5, and 10 % w/w) on the microstructure and mechanical performance of cement composites reinforced with cellulosic pulp. Fiber-cement composites with unbleached eucalyptus Kraft pulp as the micro-fiber reinforcement were produced by the slurry dewatering technique followed by pressing. The average values of the modulus of rupture of the fiber-cement decreased with increasing colloidal silica content. However, the pullout of the fibers increased significantly in the fiber-cement composites with additions between 3 and 10 % w/w of colloidal silica suspension, as indicated in the scanning electron microscopy images and by the improvement in the energy of fracture values.en
dc.description.affiliationState Univ Sao Paulo, Dept Mat & Technol, BR-12516410 Guaratingueta, SP, Brazil
dc.description.affiliationUniv Fed Sao Carlos, Dept Mat Engn, BR-13565905 Sao Carlos, SP, Brazil
dc.description.affiliationUniv Fed Lavras, Dept Forest Sci, BR-37200000 Lavras, MG, Brazil
dc.description.affiliationUniv Sao Paulo, Dept Biosyst Engn, BR-13635900 Pirassununga, SP, Brazil
dc.description.affiliationUnespState Univ Sao Paulo, Dept Mat & Technol, BR-12516410 Guaratingueta, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.description.sponsorshipIdFAPESP: 08/04769-9
dc.description.sponsorshipIdFAPESP: 09/10614-0
dc.description.sponsorshipIdFAPESP: 09/17293-5
dc.description.sponsorshipIdFAPESP: 10/16524-0
dc.description.sponsorshipIdCNPq: 472133/2009-8
dc.description.sponsorshipIdCNPq: 305792/2009-1
dc.description.sponsorshipIdCNPq: 303061/2009-0
dc.format.extent7497-7506
dc.identifierhttp://dx.doi.org/10.1007/s10853-014-8455-1
dc.identifier.citationJournal Of Materials Science. New York: Springer, v. 49, n. 21, p. 7497-7506, 2014.
dc.identifier.doi10.1007/s10853-014-8455-1
dc.identifier.issn0022-2461
dc.identifier.orcid0000-0003-3384-0754
dc.identifier.urihttp://hdl.handle.net/11449/116313
dc.identifier.wosWOS:000340679000017
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal Of Materials Science
dc.relation.ispartofjcr2.993
dc.relation.ispartofsjr0,807
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleEffect of colloidal silica on the mechanical properties of fiber-cement reinforced with cellulosic fibersen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.orcid0000-0003-3384-0754[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt

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