Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions
Autor(a) principal: | |
---|---|
Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/88575 |
Resumo: | This research study was aimed at assessing the potential use of glass powder (GW), from the production of optical lenses, as a substitute of commercial sodium silicate (SS), to produce fly ash-based alkaline cements. The dissolution of the GW and the subsequent activation were achieved either with a cleaning solution (CS) from the aluminium casting industry, and a commercial sodium hydroxide solution (SH) so as to. Firstly, GW dissolution with CS and SH was evaluated at different time and temperatures, i.e.,16 h, 3, 7 and 28 days at 20 °C and 16 h at 20, 40, 60 and 80 °C, to find the best dissolution rate, which an optimum point was observed when CS was the dissolving agent. Then, several pastes were synthesized and cured for 7 days at 50 °C to assess their mechanical behaviour and alkaline-activated gel formation by compressive strength test. Furthermore, reaction products were characterized by X-ray diffraction (XRD) and electron microscopy (SEM/EDX). The observations reveal that although SH solution acted well to dissolve GW, so that the compressive strength was close to that of SS, CS also showed reasonable potential to be used as a dissolving agent for GW, rendering a cheap and environmentally friendly alternative activator. Microstructural analysis also illustrated the rise in the crystallinity of the reaction products obtained from industrial by-products, i.e., GW and CS. |
id |
RCAP_ecc61f14ecdf9f854349c54e24117255 |
---|---|
oai_identifier_str |
oai:repositorium.sdum.uminho.pt:1822/88575 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactionsAlkaline activationFly ashGlass wasteSoluble silicaEngenharia e Tecnologia::Engenharia CivilIndústria, inovação e infraestruturasThis research study was aimed at assessing the potential use of glass powder (GW), from the production of optical lenses, as a substitute of commercial sodium silicate (SS), to produce fly ash-based alkaline cements. The dissolution of the GW and the subsequent activation were achieved either with a cleaning solution (CS) from the aluminium casting industry, and a commercial sodium hydroxide solution (SH) so as to. Firstly, GW dissolution with CS and SH was evaluated at different time and temperatures, i.e.,16 h, 3, 7 and 28 days at 20 °C and 16 h at 20, 40, 60 and 80 °C, to find the best dissolution rate, which an optimum point was observed when CS was the dissolving agent. Then, several pastes were synthesized and cured for 7 days at 50 °C to assess their mechanical behaviour and alkaline-activated gel formation by compressive strength test. Furthermore, reaction products were characterized by X-ray diffraction (XRD) and electron microscopy (SEM/EDX). The observations reveal that although SH solution acted well to dissolve GW, so that the compressive strength was close to that of SS, CS also showed reasonable potential to be used as a dissolving agent for GW, rendering a cheap and environmentally friendly alternative activator. Microstructural analysis also illustrated the rise in the crystallinity of the reaction products obtained from industrial by-products, i.e., GW and CS.This work was funded by the R&D Project “New Eco-innovative Materials for Mining Infra”, with reference ERA-MIN/0001/2018, financed by the Foundation for Science and Technology (FCT).ElsevierUniversidade do MinhoKhaksar Najafi, ElmiraTavares, PedroMiranda, Tiago F. S.Reza Manaviparast, HamidCristelo, Nuno20232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/88575engKhaksar Najafi, E., Tavares, P., Miranda, T., Reza Manaviparast, H., & Cristelo, N. (2023). Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions. Construction and Building Materials. Elsevier BV. http://doi.org/10.1016/j.conbuildmat.2023.1318540950-06181879-052610.1016/j.conbuildmat.2023.131854https://www.sciencedirect.com/science/article/pii/S0950061823015672info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-10T01:20:51Zoai:repositorium.sdum.uminho.pt:1822/88575Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:37:16.506579Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions |
title |
Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions |
spellingShingle |
Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions Khaksar Najafi, Elmira Alkaline activation Fly ash Glass waste Soluble silica Engenharia e Tecnologia::Engenharia Civil Indústria, inovação e infraestruturas |
title_short |
Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions |
title_full |
Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions |
title_fullStr |
Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions |
title_full_unstemmed |
Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions |
title_sort |
Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions |
author |
Khaksar Najafi, Elmira |
author_facet |
Khaksar Najafi, Elmira Tavares, Pedro Miranda, Tiago F. S. Reza Manaviparast, Hamid Cristelo, Nuno |
author_role |
author |
author2 |
Tavares, Pedro Miranda, Tiago F. S. Reza Manaviparast, Hamid Cristelo, Nuno |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Khaksar Najafi, Elmira Tavares, Pedro Miranda, Tiago F. S. Reza Manaviparast, Hamid Cristelo, Nuno |
dc.subject.por.fl_str_mv |
Alkaline activation Fly ash Glass waste Soluble silica Engenharia e Tecnologia::Engenharia Civil Indústria, inovação e infraestruturas |
topic |
Alkaline activation Fly ash Glass waste Soluble silica Engenharia e Tecnologia::Engenharia Civil Indústria, inovação e infraestruturas |
description |
This research study was aimed at assessing the potential use of glass powder (GW), from the production of optical lenses, as a substitute of commercial sodium silicate (SS), to produce fly ash-based alkaline cements. The dissolution of the GW and the subsequent activation were achieved either with a cleaning solution (CS) from the aluminium casting industry, and a commercial sodium hydroxide solution (SH) so as to. Firstly, GW dissolution with CS and SH was evaluated at different time and temperatures, i.e.,16 h, 3, 7 and 28 days at 20 °C and 16 h at 20, 40, 60 and 80 °C, to find the best dissolution rate, which an optimum point was observed when CS was the dissolving agent. Then, several pastes were synthesized and cured for 7 days at 50 °C to assess their mechanical behaviour and alkaline-activated gel formation by compressive strength test. Furthermore, reaction products were characterized by X-ray diffraction (XRD) and electron microscopy (SEM/EDX). The observations reveal that although SH solution acted well to dissolve GW, so that the compressive strength was close to that of SS, CS also showed reasonable potential to be used as a dissolving agent for GW, rendering a cheap and environmentally friendly alternative activator. Microstructural analysis also illustrated the rise in the crystallinity of the reaction products obtained from industrial by-products, i.e., GW and CS. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023 2023-01-01T00:00:00Z |
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 |
https://hdl.handle.net/1822/88575 |
url |
https://hdl.handle.net/1822/88575 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Khaksar Najafi, E., Tavares, P., Miranda, T., Reza Manaviparast, H., & Cristelo, N. (2023). Ophthalmic glass lens waste as an alternative soluble silica source for alkali-activation reactions. Construction and Building Materials. Elsevier BV. http://doi.org/10.1016/j.conbuildmat.2023.131854 0950-0618 1879-0526 10.1016/j.conbuildmat.2023.131854 https://www.sciencedirect.com/science/article/pii/S0950061823015672 |
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.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799137423891890176 |