Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)

Moraes, J. C.B. [UNESP]; Tashima, M. M. [UNESP]; Akasaki, J. L. [UNESP]; Melges, J. L.P. [UNESP]; Monzó, J.; Borrachero, M. V.; Soriano, L.; Payá, J.

Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)

Alkali-activated materials (AAM) comprise one of the solutions to diminish the use of Portland cement in building construction and, consequently, a reduction in the environmental problems related to CO2 emissions and energy consumption may be achieved. These kinds of binders are obtained when a mine...

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Autores:	Moraes, J. C.B. [UNESP], Tashima, M. M. [UNESP], Akasaki, J. L. [UNESP], Melges, J. L.P. [UNESP], Monzó, J., Borrachero, M. V., Soriano, L., Payá, J.
Formato:	artículo
Estado:	Versión publicada
Fecha de publicación:	2017
País:	Brasil
Recursos:	Universidade Estadual Paulista (UNESP)
Repositorio:	Repositório Institucional da UNESP
Idioma:	inglés
OAI Identifier:	oai:repositorio.unesp.br:11449/169588
Acesso em linha:	http://dx.doi.org/10.1016/j.conbuildmat.2017.03.166 http://hdl.handle.net/11449/169588
Access Level:	acceso abierto
Palavra-chave:	Biomass waste Compressive strength Environmentally friendly material Microstructural studies Sustainability

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spelling	Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)Biomass wasteCompressive strengthEnvironmentally friendly materialMicrostructural studiesSustainabilityAlkali-activated materials (AAM) comprise one of the solutions to diminish the use of Portland cement in building construction and, consequently, a reduction in the environmental problems related to CO2 emissions and energy consumption may be achieved. These kinds of binders are obtained when a mineral precursor (calcium silicate or aluminosilicate material) is mixed with an alkaline solution. In this study, the blast furnace slag (BFS) combined with a new waste from the sugar cane industry, sugar cane straw ash (SCSA), is utilised. This new residue was studied replacing partially the blast furnace slag in BFS/SCSA proportions of 100/0, 85/15, 75/25, 67/33 and 50/50. The alkaline solution concentration plays an important role in obtaining AAM with good mechanical properties. Therefore, this paper intends to assess the influence of the activating solution (composed of sodium hydroxide and sodium silicate) through different H2O/Na2O (called η) and SiO2/Na2O (called ε) molar ratios. For BFS/SCSA proportions of 100/0 and 75/25, the η values assessed were 22, 28 and 37, whereas the ε values selected were 0 and 0.75. In order to study the effects of SCSA in the mixture, other BFS/SCSA proportions (0–50% replacement) were assessed by only η and ε ratios of 28 and 0–0.75, respectively. To reach these objectives, mortars and pastes were manufactured in order to study their behaviour in the following testscompressive strength (3, 7, 28 and 90 days of curing at 25 °C), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), mercury intrusion porosimetry (MIP) and field emission scanning electron microscopy (FESEM). The results showed that the alkaline solution influenced the compressive strength development, and specimens reached more than 60 MPa after 90 days of curing. In addition, the mortars with SCSA and without sodium silicate presented similar values of compressive strength to those samples with only BFS and sodium silicate, showing that the ash can replace the sodium silicate, which is the pollutant and an expensive chemical reagent, yielding a sustainable binder. Therefore, SCSA presented good results and is a promising material in alkali-activated binders.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Ministerio de Educación, Cultura y DeporteUNESP – Grupo de Pesquisa MAC – Materiais Alternativos de Construção Univ Estadual Paulista, Campus de Ilha SolteiraICITECH – GIQUIMA Group – Grupo de Investigación en Química de los Materiales de Construcción Instituto de Ciencia y Tecnología del Hormigón Universitat Politècnica de ValenciaUNESP – Grupo de Pesquisa MAC – Materiais Alternativos de Construção Univ Estadual Paulista, Campus de Ilha SolteiraCNPq: 401724/2013-1Universidade Estadual Paulista (Unesp)Universitat Politècnica de Valencia2018-12-11T16:46:43Z2018-12-11T16:46:43Z2017-07-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article214-224application/pdfhttp://dx.doi.org/10.1016/j.conbuildmat.2017.03.166Construction and Building Materials, v. 144, p. 214-224.0950-0618http://hdl.handle.net/11449/16958810.1016/j.conbuildmat.2017.03.1662-s2.0-850164079222-s2.0-85016407922.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengConstruction and Building Materials1,607info:eu-repo/semantics/openAccessMoraes, J. C.B. [UNESP]Tashima, M. M. [UNESP]Akasaki, J. L. [UNESP]Melges, J. L.P. [UNESP]Monzó, J.Borrachero, M. V.Soriano, L.Payá, J.2025-04-03T15:34:27Zoai:repositorio.unesp.br:11449/169588Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462025-04-03T15:34:27Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv	Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)
title	Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)
spellingShingle	Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS) Moraes, J. C.B. [UNESP] Biomass waste Compressive strength Environmentally friendly material Microstructural studies Sustainability
title_short	Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)
title_full	Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)
title_fullStr	Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)
title_full_unstemmed	Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)
title_sort	Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)
dc.creator.none.fl_str_mv	Moraes, J. C.B. [UNESP] Tashima, M. M. [UNESP] Akasaki, J. L. [UNESP] Melges, J. L.P. [UNESP] Monzó, J. Borrachero, M. V. Soriano, L. Payá, J.
author	Moraes, J. C.B. [UNESP]
author_facet	Moraes, J. C.B. [UNESP] Tashima, M. M. [UNESP] Akasaki, J. L. [UNESP] Melges, J. L.P. [UNESP] Monzó, J. Borrachero, M. V. Soriano, L. Payá, J.
author_role	author
author2	Tashima, M. M. [UNESP] Akasaki, J. L. [UNESP] Melges, J. L.P. [UNESP] Monzó, J. Borrachero, M. V. Soriano, L. Payá, J.
author2_role	author author author author author author author
dc.contributor.none.fl_str_mv	Universidade Estadual Paulista (Unesp) Universitat Politècnica de Valencia
dc.subject.por.fl_str_mv	Biomass waste Compressive strength Environmentally friendly material Microstructural studies Sustainability
topic	Biomass waste Compressive strength Environmentally friendly material Microstructural studies Sustainability
description	Alkali-activated materials (AAM) comprise one of the solutions to diminish the use of Portland cement in building construction and, consequently, a reduction in the environmental problems related to CO2 emissions and energy consumption may be achieved. These kinds of binders are obtained when a mineral precursor (calcium silicate or aluminosilicate material) is mixed with an alkaline solution. In this study, the blast furnace slag (BFS) combined with a new waste from the sugar cane industry, sugar cane straw ash (SCSA), is utilised. This new residue was studied replacing partially the blast furnace slag in BFS/SCSA proportions of 100/0, 85/15, 75/25, 67/33 and 50/50. The alkaline solution concentration plays an important role in obtaining AAM with good mechanical properties. Therefore, this paper intends to assess the influence of the activating solution (composed of sodium hydroxide and sodium silicate) through different H2O/Na2O (called η) and SiO2/Na2O (called ε) molar ratios. For BFS/SCSA proportions of 100/0 and 75/25, the η values assessed were 22, 28 and 37, whereas the ε values selected were 0 and 0.75. In order to study the effects of SCSA in the mixture, other BFS/SCSA proportions (0–50% replacement) were assessed by only η and ε ratios of 28 and 0–0.75, respectively. To reach these objectives, mortars and pastes were manufactured in order to study their behaviour in the following testscompressive strength (3, 7, 28 and 90 days of curing at 25 °C), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), mercury intrusion porosimetry (MIP) and field emission scanning electron microscopy (FESEM). The results showed that the alkaline solution influenced the compressive strength development, and specimens reached more than 60 MPa after 90 days of curing. In addition, the mortars with SCSA and without sodium silicate presented similar values of compressive strength to those samples with only BFS and sodium silicate, showing that the ash can replace the sodium silicate, which is the pollutant and an expensive chemical reagent, yielding a sustainable binder. Therefore, SCSA presented good results and is a promising material in alkali-activated binders.
publishDate	2017
dc.date.none.fl_str_mv	2017-07-30 2018-12-11T16:46:43Z 2018-12-11T16:46:43Z
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.conbuildmat.2017.03.166 Construction and Building Materials, v. 144, p. 214-224. 0950-0618 http://hdl.handle.net/11449/169588 10.1016/j.conbuildmat.2017.03.166 2-s2.0-85016407922 2-s2.0-85016407922.pdf
url	http://dx.doi.org/10.1016/j.conbuildmat.2017.03.166 http://hdl.handle.net/11449/169588
identifier_str_mv	Construction and Building Materials, v. 144, p. 214-224. 0950-0618 10.1016/j.conbuildmat.2017.03.166 2-s2.0-85016407922 2-s2.0-85016407922.pdf
dc.language.iso.fl_str_mv	eng
language	eng
dc.relation.none.fl_str_mv	Construction and Building Materials 1,607
dc.rights.driver.fl_str_mv	info:eu-repo/semantics/openAccess
eu_rights_str_mv	openAccess
dc.format.none.fl_str_mv	214-224 application/pdf
dc.source.none.fl_str_mv	Scopus 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	repositoriounesp@unesp.br
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score	15.301629

Effect of sugar cane straw ash (SCSA) as solid precursor and the alkaline activator composition on alkali-activated binders based on blast furnace slag (BFS)

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