Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.ceramint.2015.07.001 http://hdl.handle.net/11449/167909 |
Resumo: | Sugarcane bagasse is an agricultural waste which can be transformed, for cementing purposes, into an interesting material by combustion. Specifically, the ash (SBA) obtained by auto-combustion was used for preparing alkali-activated cements by blending blast furnace slag (BFS). SBA had a large amount of quartz; however, it reacted in high alkaline medium. Mixtures of BFS/SBA have been used for preparing alkali-activated mortars, by using NaOH (8M solution), sodium silicate (8M solution in Na+ and SiO2/Na2O molar ratio of 0.5) and KOH (8M solution) as activating solutions. Replacements of 25%, 33% and 50% of BFS by SBA were carried out and compressive strengths in the range 16-51MPa were obtained after 90 curing days. Microstructural studies demonstrated that the hydration products formed in the activation of BFS are not significantly affected by the presence of SBA in the mixture. The durability of alkali-activated mortars was compared to ordinary Portland cement (OPC) mortar in the following media: hydrochloric acid, acetic acid, ammonium chloride, sodium sulphate and magnesium sulphate. The behaviour of alkali-activated mortars with BFS and BFS/SBA was better than that found for plain OPC mortars, especially in ammonium chloride, acetic acid and sodium sulphate media. After 200 days of testing in ammonium chloride solution, the compressive strength loss for Portland cement mortar was about 83.3%. For the same test conditions, alkali-activated mortars presented a maximum reduction of 48.4%. The presence of SBA in alkali-activated BFS mortars did not produce any serious problems in durability. As a general conclusion, sugarcane bagasse ash (SBA) obtained by auto-combustion showed good cementing properties as a mineral precursor blended with blast furnace slag (BFS) in alkali-activated systems. |
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Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slagAlkali activationBlast furnace slagC. StrengthDurabilitySugarcane bagasse ashSugarcane bagasse is an agricultural waste which can be transformed, for cementing purposes, into an interesting material by combustion. Specifically, the ash (SBA) obtained by auto-combustion was used for preparing alkali-activated cements by blending blast furnace slag (BFS). SBA had a large amount of quartz; however, it reacted in high alkaline medium. Mixtures of BFS/SBA have been used for preparing alkali-activated mortars, by using NaOH (8M solution), sodium silicate (8M solution in Na+ and SiO2/Na2O molar ratio of 0.5) and KOH (8M solution) as activating solutions. Replacements of 25%, 33% and 50% of BFS by SBA were carried out and compressive strengths in the range 16-51MPa were obtained after 90 curing days. Microstructural studies demonstrated that the hydration products formed in the activation of BFS are not significantly affected by the presence of SBA in the mixture. The durability of alkali-activated mortars was compared to ordinary Portland cement (OPC) mortar in the following media: hydrochloric acid, acetic acid, ammonium chloride, sodium sulphate and magnesium sulphate. The behaviour of alkali-activated mortars with BFS and BFS/SBA was better than that found for plain OPC mortars, especially in ammonium chloride, acetic acid and sodium sulphate media. After 200 days of testing in ammonium chloride solution, the compressive strength loss for Portland cement mortar was about 83.3%. For the same test conditions, alkali-activated mortars presented a maximum reduction of 48.4%. The presence of SBA in alkali-activated BFS mortars did not produce any serious problems in durability. As a general conclusion, sugarcane bagasse ash (SBA) obtained by auto-combustion showed good cementing properties as a mineral precursor blended with blast furnace slag (BFS) in alkali-activated systems.UNESP-Univ Estadual Paulista, Campus de Ilha Solteira, Alameda Bahia 550, Ilha Solteira, SP CEP 15385-000, BrazilInstituto de Ciencia y Tecnología del Hormigón, Universitat Politècnica de València, Camino de Vera s/n, Edificio 4G, Valencia 46022, SpainUniversidade Estadual Paulista (Unesp)Pereira, AdrianaAkasaki, Jorge L.Melges, José L.P.Tashima, Mauro M.Soriano, LourdesBorrachero, María V.Monzó, JoséPayá, Jordi2018-12-11T16:38:50Z2018-12-11T16:38:50Z2015-02-24info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1016/j.ceramint.2015.07.001Ceramics International, v. 41.0272-8842http://hdl.handle.net/11449/16790910.1016/j.ceramint.2015.07.0012-s2.0-849371305052-s2.0-84937130505.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengCeramics International0,784info:eu-repo/semantics/openAccess2023-09-30T06:04:45Zoai:repositorio.unesp.br:11449/167909Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-09-30T06:04:45Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag |
title |
Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag |
spellingShingle |
Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag Pereira, Adriana Alkali activation Blast furnace slag C. Strength Durability Sugarcane bagasse ash |
title_short |
Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag |
title_full |
Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag |
title_fullStr |
Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag |
title_full_unstemmed |
Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag |
title_sort |
Mechanical and durability properties of alkali-activated mortar based on sugarcane bagasse ash and blast furnace slag |
author |
Pereira, Adriana |
author_facet |
Pereira, Adriana Akasaki, Jorge L. Melges, José L.P. Tashima, Mauro M. Soriano, Lourdes Borrachero, María V. Monzó, José Payá, Jordi |
author_role |
author |
author2 |
Akasaki, Jorge L. Melges, José L.P. Tashima, Mauro M. Soriano, Lourdes Borrachero, María V. Monzó, José Payá, Jordi |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Pereira, Adriana Akasaki, Jorge L. Melges, José L.P. Tashima, Mauro M. Soriano, Lourdes Borrachero, María V. Monzó, José Payá, Jordi |
dc.subject.por.fl_str_mv |
Alkali activation Blast furnace slag C. Strength Durability Sugarcane bagasse ash |
topic |
Alkali activation Blast furnace slag C. Strength Durability Sugarcane bagasse ash |
description |
Sugarcane bagasse is an agricultural waste which can be transformed, for cementing purposes, into an interesting material by combustion. Specifically, the ash (SBA) obtained by auto-combustion was used for preparing alkali-activated cements by blending blast furnace slag (BFS). SBA had a large amount of quartz; however, it reacted in high alkaline medium. Mixtures of BFS/SBA have been used for preparing alkali-activated mortars, by using NaOH (8M solution), sodium silicate (8M solution in Na+ and SiO2/Na2O molar ratio of 0.5) and KOH (8M solution) as activating solutions. Replacements of 25%, 33% and 50% of BFS by SBA were carried out and compressive strengths in the range 16-51MPa were obtained after 90 curing days. Microstructural studies demonstrated that the hydration products formed in the activation of BFS are not significantly affected by the presence of SBA in the mixture. The durability of alkali-activated mortars was compared to ordinary Portland cement (OPC) mortar in the following media: hydrochloric acid, acetic acid, ammonium chloride, sodium sulphate and magnesium sulphate. The behaviour of alkali-activated mortars with BFS and BFS/SBA was better than that found for plain OPC mortars, especially in ammonium chloride, acetic acid and sodium sulphate media. After 200 days of testing in ammonium chloride solution, the compressive strength loss for Portland cement mortar was about 83.3%. For the same test conditions, alkali-activated mortars presented a maximum reduction of 48.4%. The presence of SBA in alkali-activated BFS mortars did not produce any serious problems in durability. As a general conclusion, sugarcane bagasse ash (SBA) obtained by auto-combustion showed good cementing properties as a mineral precursor blended with blast furnace slag (BFS) in alkali-activated systems. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-02-24 2018-12-11T16:38:50Z 2018-12-11T16:38:50Z |
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.ceramint.2015.07.001 Ceramics International, v. 41. 0272-8842 http://hdl.handle.net/11449/167909 10.1016/j.ceramint.2015.07.001 2-s2.0-84937130505 2-s2.0-84937130505.pdf |
url |
http://dx.doi.org/10.1016/j.ceramint.2015.07.001 http://hdl.handle.net/11449/167909 |
identifier_str_mv |
Ceramics International, v. 41. 0272-8842 10.1016/j.ceramint.2015.07.001 2-s2.0-84937130505 2-s2.0-84937130505.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ceramics International 0,784 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
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 |
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1799964377125748736 |