Publication
Protection of concretes against chemically aggressive environments
| Summary: | It is now accepted that the durability of reinforced concrete depends mainly on the composition and properties of the concrete surface layer. This layer, sometimes with a thickness close to the cover of the reinforcement, is most of the times the only responsible for the corrosion protection of the reinforcement. Surface treatments act as a barrier between the environment and the concrete. They prevent or retard the entry of harmful substances such as water, chlorides, etc.. A lot of research is made on water repellent treatment of building materials, as well as on the effect of these agents on barrier properties. Four international conferences were dedicated to the subject, of which the first took place in Delft in 1995, followed by Zürich (1998), Hannover (2001) and Stockholm (2005). Barrier properties are discussed and surface coatings with appropriate “barrier” characteristics can cut off the transportation path into concrete. The European standard EN 1504-2, establishes as a minimum requirement for the coated concrete ingress that the capillary absorption and the water permeability coefficient should not exceed 0.1 kgm-2h-0.5 and the CO2 permeability should at least correspond to a sD (thickness of air layer with equivalent diffusion) value of 50 m. With a wide range of hydrophobic agents and coatings available in the market, it becomes extremely difficult to choose the right type of these products, since similar generic types are known to possess considerably different diffusion characteristics. The performance of the available generic types under different service conditions needs to be studied. There is also a need to develop performance criteria for evaluation of concrete coatings and guidelines for the selection of appropriate products for various exposure conditions. |
|---|---|
| Main Authors: | Aguiar, J. L. Barroso de |
| Other Authors: | Camões, Aires; Moreira, Pedro M. |
| Subject: | Silicone hydrophobic agent Acrylic coating Epoxy coating Protected concrete Chemical attack |
| Year: | 2008 |
| Country: | Portugal |
| Document type: | book part |
| Access type: | open access |
| Associated institution: | Universidade do Minho |
| Language: | English |
| Origin: | RepositóriUM - Universidade do Minho |
| _version_ | 1867439685485199360 |
|---|---|
| author | Aguiar, J. L. Barroso de |
| author2 | Camões, Aires Moreira, Pedro M. |
| author2_role | author author |
| author_facet | Aguiar, J. L. Barroso de Camões, Aires Moreira, Pedro M. |
| author_role | author |
| contributor_name_str_mv | RepositóriUM - Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Aguiar, J. L. Barroso de\"},{\"Person.name\":\"Camões, Aires\"},{\"Person.name\":\"Moreira, Pedro M.\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | RepositóriUM - Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Aguiar, J. L. Barroso de Camões, Aires Moreira, Pedro M. |
| datacite.date.Accepted.fl_str_mv | 2008-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2011-07-18T16:02:39Z |
| datacite.date.embargoed.fl_str_mv | 2011-07-18T16:02:39Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Silicone hydrophobic agent Acrylic coating Epoxy coating Protected concrete Chemical attack |
| datacite.titles.title.fl_str_mv | Protection of concretes against chemically aggressive environments |
| dc.contributor.none.fl_str_mv | RepositóriUM - Universidade do Minho |
| dc.creator.none.fl_str_mv | Aguiar, J. L. Barroso de Camões, Aires Moreira, Pedro M. |
| dc.date.Accepted.fl_str_mv | 2008-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2011-07-18T16:02:39Z |
| dc.date.embargoed.fl_str_mv | 2011-07-18T16:02:39Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/12864 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | The Silesian University of Technology |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Silicone hydrophobic agent Acrylic coating Epoxy coating Protected concrete Chemical attack |
| dc.title.fl_str_mv | Protection of concretes against chemically aggressive environments |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_3248 |
| description | It is now accepted that the durability of reinforced concrete depends mainly on the composition and properties of the concrete surface layer. This layer, sometimes with a thickness close to the cover of the reinforcement, is most of the times the only responsible for the corrosion protection of the reinforcement. Surface treatments act as a barrier between the environment and the concrete. They prevent or retard the entry of harmful substances such as water, chlorides, etc.. A lot of research is made on water repellent treatment of building materials, as well as on the effect of these agents on barrier properties. Four international conferences were dedicated to the subject, of which the first took place in Delft in 1995, followed by Zürich (1998), Hannover (2001) and Stockholm (2005). Barrier properties are discussed and surface coatings with appropriate “barrier” characteristics can cut off the transportation path into concrete. The European standard EN 1504-2, establishes as a minimum requirement for the coated concrete ingress that the capillary absorption and the water permeability coefficient should not exceed 0.1 kgm-2h-0.5 and the CO2 permeability should at least correspond to a sD (thickness of air layer with equivalent diffusion) value of 50 m. With a wide range of hydrophobic agents and coatings available in the market, it becomes extremely difficult to choose the right type of these products, since similar generic types are known to possess considerably different diffusion characteristics. The performance of the available generic types under different service conditions needs to be studied. There is also a need to develop performance criteria for evaluation of concrete coatings and guidelines for the selection of appropriate products for various exposure conditions. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | bookPart |
| fulltext.url.fl_str_mv | https://repositorium.uminho.pt/bitstreams/41d1514d-334f-449d-8861-939838371a35/download |
| id | rum_afdcd003c44fb5e969419d91a2dad00a |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/12864 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/12864 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Aguiar, J. L. Barroso de Camões, Aires Moreira, Pedro M. |
| publishDate | 2008 |
| publisher.none.fl_str_mv | The Silesian University of Technology |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engThe Silesian University of TechnologyporIt is now accepted that the durability of reinforced concrete depends mainly on the composition and properties of the concrete surface layer. This layer, sometimes with a thickness close to the cover of the reinforcement, is most of the times the only responsible for the corrosion protection of the reinforcement. Surface treatments act as a barrier between the environment and the concrete. They prevent or retard the entry of harmful substances such as water, chlorides, etc.. A lot of research is made on water repellent treatment of building materials, as well as on the effect of these agents on barrier properties. Four international conferences were dedicated to the subject, of which the first took place in Delft in 1995, followed by Zürich (1998), Hannover (2001) and Stockholm (2005). Barrier properties are discussed and surface coatings with appropriate “barrier” characteristics can cut off the transportation path into concrete. The European standard EN 1504-2, establishes as a minimum requirement for the coated concrete ingress that the capillary absorption and the water permeability coefficient should not exceed 0.1 kgm-2h-0.5 and the CO2 permeability should at least correspond to a sD (thickness of air layer with equivalent diffusion) value of 50 m. With a wide range of hydrophobic agents and coatings available in the market, it becomes extremely difficult to choose the right type of these products, since similar generic types are known to possess considerably different diffusion characteristics. The performance of the available generic types under different service conditions needs to be studied. There is also a need to develop performance criteria for evaluation of concrete coatings and guidelines for the selection of appropriate products for various exposure conditions.application/pdfporProtection of concretes against chemically aggressive environmentsAguiar, J. L. Barroso deCamões, AiresMoreira, Pedro M.HostingInstitutionOrganizationalRepositóriUM - Universidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptISBNIsPartOf978-83-919909-2-62011-07-18T16:02:39Z20082008-01-01T00:00:00ZHandlehttps://hdl.handle.net/1822/12864http://purl.org/coar/access_right/c_abf2open accessSilicone hydrophobic agentAcrylic coatingEpoxy coatingProtected concreteChemical attack2828139 bytesliteraturehttp://purl.org/coar/resource_type/c_3248book parthttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://repositorium.uminho.pt/bitstreams/41d1514d-334f-449d-8861-939838371a35/download |
| spellingShingle | Protection of concretes against chemically aggressive environments Aguiar, J. L. Barroso de Silicone hydrophobic agent Acrylic coating Epoxy coating Protected concrete Chemical attack |
| status | SINGLETON |
| subject.fl_str_mv | Silicone hydrophobic agent Acrylic coating Epoxy coating Protected concrete Chemical attack |
| title | Protection of concretes against chemically aggressive environments |
| title_full | Protection of concretes against chemically aggressive environments |
| title_fullStr | Protection of concretes against chemically aggressive environments |
| title_full_unstemmed | Protection of concretes against chemically aggressive environments |
| title_short | Protection of concretes against chemically aggressive environments |
| title_sort | Protection of concretes against chemically aggressive environments |
| topic | Silicone hydrophobic agent Acrylic coating Epoxy coating Protected concrete Chemical attack |
| topic_facet | Silicone hydrophobic agent Acrylic coating Epoxy coating Protected concrete Chemical attack |
| url | https://hdl.handle.net/1822/12864 |
| visible | 1 |