Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements

dc.contributor.authorNakanishi, Erika Y.
dc.contributor.authorFrias, Moises
dc.contributor.authorSantos, Sergio F. [UNESP]
dc.contributor.authorRodrigues, Michelle S.
dc.contributor.authorla Villa, Raquel Vigil de
dc.contributor.authorRodriguez, Olga
dc.contributor.authorSavastano Junior, Holmer
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionEduardo Torroja Inst IETcc CSIC
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionAutonomous Univ Madrid
dc.description.abstractIn recent years, agro-industrial residues are focusing attention worldwide as a new source of pozzolans; in Brazil one of the wastes generated from agro-industrial activities comes from elephant grass that is cultivated as biomass for energy cogeneration. The goal of this paper is to analyze the influence of elephant grass, once activated at 700 degrees C for 1 h in electric furnace, on the evolution of the hydration reaction as well as physical and mechanical properties in blended cement elaborated with 20% of elephant grass ash. For the present study, different instrumental techniques of characterization and methodologies (XRF, XRD, TG/DTG, mercury porosimetry, isothermal calorimetry and mechanical strength) were used. The results obtained in the present work show, that due to its high pozzolanic activity, the elephant grass ash activated at 700 degrees C can be used as an alternative pozzolan in the blended cement manufacture. Additions of 20% of ash confirm the formation of CSH gels and hexagonal C(4)AH(13) as main products from hydration as well as pozzolanic reaction. The 20% ash blended cement showed lower heat evolution than OPC and similar to the 20% silica fume blended cement, a 12% of reduction of compressive strength and an important reduction of pore sizes below 50 nm. (C) 2016 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniv Sao Paulo, FZEA, Dept Biosyst Engn, Ave Duque Caxias Norte 225, BR-13635900 Pirassununga, SP, Brazil
dc.description.affiliationEduardo Torroja Inst IETcc CSIC, C Serrano Galvache 4, Madrid 28033, Spain
dc.description.affiliationSao Paulo State Univ, Fac Engn, Dept Mat & Technol, Guaratingueta, SP, Brazil
dc.description.affiliationAutonomous Univ Madrid, Associate Unit CSIC UAM, Geol & Geochem Dept, E-28049 Madrid, Spain
dc.description.affiliationUnespSao Paulo State Univ, Fac Engn, Dept Mat & Technol, 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.sponsorshipIdFAPESP: 2011/16842-5
dc.description.sponsorshipIdFAPESP: 2010/16524-0
dc.description.sponsorshipIdFAPESP: 2009/17293-5
dc.description.sponsorshipIdFAPESP: 2013/50790-8
dc.description.sponsorshipIdFAPESP: i-Link0675-2013
dc.description.sponsorshipIdCNPq: 306386/2013-5
dc.identifier.citationJournal Of Cleaner Production. Oxford: Elsevier Sci Ltd, v. 116, p. 236-243, 2016.
dc.publisherElsevier B.V.
dc.relation.ispartofJournal Of Cleaner Production
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectElephant grass ash
dc.subjectPozzolanic activity
dc.subjectBlended cement
dc.subjectHydrated phases
dc.titleInvestigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cementsen
dcterms.rightsHolderElsevier B.V.[2][6][7]


Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
1.57 MB
Adobe Portable Document Format