Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moisture
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://repositorio.lnec.pt:8080/jspui/handle/123456789/1006736 |
Resumo: | One of the possible strategies to protect concrete from aggressive agents consists of applying impregnation products on its smface. This type of strategy is relatively often used in both new and existing structures. However, there are still several aspects conceming impregnation products whose understanding is still rather limited, inc1uding the influence of the concrete substrate on their performance. This paper presents an experimental study on the influence of the roughness and the moisture content of concrete substrates in the pelfOlmance of impregnation product~ used for superficial protection. For that purpose, two impregnations products based on epoxy resins were applied on concrete specimens with two different water/cement ratios (0.40 and 0.70). The concrete specimens were prepared according to different procedures, which created (i) three different smface roughnesses (no preparation, use of a 160 bar water jet and use of needle scalers) and (ii) three different moisture contents (3, 4.5 and 6 %). The perfOlmance of the protection systems was evaluated by means of the following tests suggested in EN 1504-2 standard: (i) product penetration depth; (ii) water absorption by immersion; (iii) abrasion resistance; (iv) impact resistance; and (v) bond strength. With the exception of the resistance to impact, the use of epoxy resins considerably improved the performance of the two types of concrete. Both surface roughness and moisture content proved to have a significant effect on the performance of the epoxy impregnations. However, such influence was different depending on the property at stake and the type of impregnation product. |
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Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moistureConcreteSurface protectionImpregnationEpoxy resinSmface preparationRoughnessMoistureOne of the possible strategies to protect concrete from aggressive agents consists of applying impregnation products on its smface. This type of strategy is relatively often used in both new and existing structures. However, there are still several aspects conceming impregnation products whose understanding is still rather limited, inc1uding the influence of the concrete substrate on their performance. This paper presents an experimental study on the influence of the roughness and the moisture content of concrete substrates in the pelfOlmance of impregnation product~ used for superficial protection. For that purpose, two impregnations products based on epoxy resins were applied on concrete specimens with two different water/cement ratios (0.40 and 0.70). The concrete specimens were prepared according to different procedures, which created (i) three different smface roughnesses (no preparation, use of a 160 bar water jet and use of needle scalers) and (ii) three different moisture contents (3, 4.5 and 6 %). The perfOlmance of the protection systems was evaluated by means of the following tests suggested in EN 1504-2 standard: (i) product penetration depth; (ii) water absorption by immersion; (iii) abrasion resistance; (iv) impact resistance; and (v) bond strength. With the exception of the resistance to impact, the use of epoxy resins considerably improved the performance of the two types of concrete. Both surface roughness and moisture content proved to have a significant effect on the performance of the epoxy impregnations. However, such influence was different depending on the property at stake and the type of impregnation product.Materials and Structures - RILEM 20142014-12-15T17:11:19Z2017-04-12T16:11:44Z2014-03-01T00:00:00Z2014-03info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://repositorio.lnec.pt:8080/jspui/handle/123456789/1006736engDOI 10.1617/s11527-014-0284-9Rodrigues, M. P.info: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:RCAAP2024-01-13T03:02:58Zoai:localhost:123456789/1006736Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:38:46.920826Repositório 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 |
Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moisture |
title |
Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moisture |
spellingShingle |
Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moisture Rodrigues, M. P. Concrete Surface protection Impregnation Epoxy resin Smface preparation Roughness Moisture |
title_short |
Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moisture |
title_full |
Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moisture |
title_fullStr |
Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moisture |
title_full_unstemmed |
Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moisture |
title_sort |
Superficial protection of concrete with epoxy resin impregnations: influence of the substrate roughness and moisture |
author |
Rodrigues, M. P. |
author_facet |
Rodrigues, M. P. |
author_role |
author |
dc.contributor.author.fl_str_mv |
Rodrigues, M. P. |
dc.subject.por.fl_str_mv |
Concrete Surface protection Impregnation Epoxy resin Smface preparation Roughness Moisture |
topic |
Concrete Surface protection Impregnation Epoxy resin Smface preparation Roughness Moisture |
description |
One of the possible strategies to protect concrete from aggressive agents consists of applying impregnation products on its smface. This type of strategy is relatively often used in both new and existing structures. However, there are still several aspects conceming impregnation products whose understanding is still rather limited, inc1uding the influence of the concrete substrate on their performance. This paper presents an experimental study on the influence of the roughness and the moisture content of concrete substrates in the pelfOlmance of impregnation product~ used for superficial protection. For that purpose, two impregnations products based on epoxy resins were applied on concrete specimens with two different water/cement ratios (0.40 and 0.70). The concrete specimens were prepared according to different procedures, which created (i) three different smface roughnesses (no preparation, use of a 160 bar water jet and use of needle scalers) and (ii) three different moisture contents (3, 4.5 and 6 %). The perfOlmance of the protection systems was evaluated by means of the following tests suggested in EN 1504-2 standard: (i) product penetration depth; (ii) water absorption by immersion; (iii) abrasion resistance; (iv) impact resistance; and (v) bond strength. With the exception of the resistance to impact, the use of epoxy resins considerably improved the performance of the two types of concrete. Both surface roughness and moisture content proved to have a significant effect on the performance of the epoxy impregnations. However, such influence was different depending on the property at stake and the type of impregnation product. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-12-15T17:11:19Z 2014-03-01T00:00:00Z 2014-03 2017-04-12T16:11:44Z |
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://repositorio.lnec.pt:8080/jspui/handle/123456789/1006736 |
url |
http://repositorio.lnec.pt:8080/jspui/handle/123456789/1006736 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
DOI 10.1617/s11527-014-0284-9 |
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 |
Materials and Structures - RILEM 2014 |
publisher.none.fl_str_mv |
Materials and Structures - RILEM 2014 |
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 |
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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 |
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1799136872612495360 |