Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jclepro.2015.12.113 http://hdl.handle.net/11449/161245 |
Resumo: | In 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. |
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Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cementsElephant grass ashPozzolanic activityBlended cementHydrated phasesPropertiesIn 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.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)CSICConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Sao Paulo, FZEA, Dept Biosyst Engn, Ave Duque Caxias Norte 225, BR-13635900 Pirassununga, SP, BrazilEduardo Torroja Inst IETcc CSIC, C Serrano Galvache 4, Madrid 28033, SpainSao Paulo State Univ, Fac Engn, Dept Mat & Technol, Guaratingueta, SP, BrazilAutonomous Univ Madrid, Associate Unit CSIC UAM, Geol & Geochem Dept, E-28049 Madrid, SpainSao Paulo State Univ, Fac Engn, Dept Mat & Technol, Guaratingueta, SP, BrazilFAPESP: 2011/16842-5FAPESP: 2010/16524-0FAPESP: 2009/17293-5FAPESP: 2013/50790-8FAPESP: i-Link0675-2013CNPq: 306386/2013-5Elsevier B.V.Universidade de São Paulo (USP)Eduardo Torroja Inst IETcc CSICUniversidade Estadual Paulista (Unesp)Autonomous Univ MadridNakanishi, Erika Y.Frias, MoisesSantos, Sergio F. [UNESP]Rodrigues, Michelle S.la Villa, Raquel Vigil deRodriguez, OlgaSavastano Junior, Holmer2018-11-26T16:27:44Z2018-11-26T16:27:44Z2016-03-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article236-243application/pdfhttp://dx.doi.org/10.1016/j.jclepro.2015.12.113Journal Of Cleaner Production. Oxford: Elsevier Sci Ltd, v. 116, p. 236-243, 2016.0959-6526http://hdl.handle.net/11449/16124510.1016/j.jclepro.2015.12.113WOS:000370885800025WOS000370885800025.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Cleaner Production1,467info:eu-repo/semantics/openAccess2024-07-02T15:03:28Zoai:repositorio.unesp.br:11449/161245Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:01:18.611481Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements |
title |
Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements |
spellingShingle |
Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements Nakanishi, Erika Y. Elephant grass ash Pozzolanic activity Blended cement Hydrated phases Properties |
title_short |
Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements |
title_full |
Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements |
title_fullStr |
Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements |
title_full_unstemmed |
Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements |
title_sort |
Investigating the possible usage of elephant grass ash to manufacture the eco-friendly binary cements |
author |
Nakanishi, Erika Y. |
author_facet |
Nakanishi, Erika Y. Frias, Moises Santos, Sergio F. [UNESP] Rodrigues, Michelle S. la Villa, Raquel Vigil de Rodriguez, Olga Savastano Junior, Holmer |
author_role |
author |
author2 |
Frias, Moises Santos, Sergio F. [UNESP] Rodrigues, Michelle S. la Villa, Raquel Vigil de Rodriguez, Olga Savastano Junior, Holmer |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Eduardo Torroja Inst IETcc CSIC Universidade Estadual Paulista (Unesp) Autonomous Univ Madrid |
dc.contributor.author.fl_str_mv |
Nakanishi, Erika Y. Frias, Moises Santos, Sergio F. [UNESP] Rodrigues, Michelle S. la Villa, Raquel Vigil de Rodriguez, Olga Savastano Junior, Holmer |
dc.subject.por.fl_str_mv |
Elephant grass ash Pozzolanic activity Blended cement Hydrated phases Properties |
topic |
Elephant grass ash Pozzolanic activity Blended cement Hydrated phases Properties |
description |
In 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. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-03-10 2018-11-26T16:27:44Z 2018-11-26T16:27:44Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.jclepro.2015.12.113 Journal Of Cleaner Production. Oxford: Elsevier Sci Ltd, v. 116, p. 236-243, 2016. 0959-6526 http://hdl.handle.net/11449/161245 10.1016/j.jclepro.2015.12.113 WOS:000370885800025 WOS000370885800025.pdf |
url |
http://dx.doi.org/10.1016/j.jclepro.2015.12.113 http://hdl.handle.net/11449/161245 |
identifier_str_mv |
Journal Of Cleaner Production. Oxford: Elsevier Sci Ltd, v. 116, p. 236-243, 2016. 0959-6526 10.1016/j.jclepro.2015.12.113 WOS:000370885800025 WOS000370885800025.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Cleaner Production 1,467 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
236-243 application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128304122691584 |