Study of the performance of four repairing material systems for hydraulic structures of concrete dams
Four types of repairing materials are studied as function of either a conventional concrete or a reference-concrete (RefC), these are: polymer-modified cement mortar (PMor), steel fiber concrete (SFco), epoxy mortar (EMor) and silica fume mortar (SFmo), to be applied in hydraulic structures surfaces...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Cerâmica
2003-01-01
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| Series: | Cerâmica |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132003000100011 |
| _version_ | 1818557623548510208 |
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| author | Kormann A. C. M. Portella K. F. Pereira P. N. Santos R. P. |
| author_facet | Kormann A. C. M. Portella K. F. Pereira P. N. Santos R. P. |
| author_sort | Kormann A. C. M. |
| collection | DOAJ |
| description | Four types of repairing materials are studied as function of either a conventional concrete or a reference-concrete (RefC), these are: polymer-modified cement mortar (PMor), steel fiber concrete (SFco), epoxy mortar (EMor) and silica fume mortar (SFmo), to be applied in hydraulic structures surfaces subjected to a high velocity water flow. Besides the mechanical requests and wearing resistance of hydraulic concrete dam structures, especially the spillway surfaces, the high solar radiation, the environmental temperature and wet and dry cycles, contribute significantly to the reduction of their lifespan. RefC and the SFco were developed based on a usual concrete mixture used in slabs of spillways. The average RefC mixture used was 1: 1.61: 2.99: 0.376, with Pozzolan-modified Portland cement consumption of 425 kg/m³. EMor and PMor mixtures followed the information given by the manufacturers and lab experience. Tests on concrete samples were carried out in laboratory simulating normally found environmental situations in order to control the mechanical resistance and the aging imposed conditions, such as solar radiation and humidity. Also, physicochemical characterizing tests were made for all used materials. From the analyzed results, two of them presented a higher performance: the EMor and SFmo. SFco presented good adherence to the RefC and good mechanical performance. However, it also presented apparent metal corrosion in humidity tests, being indicated for use, with caution, as an intermediate layer in underwater repairs. In a general classification, considering all tests, including their field applications, the better performance material systems were EMor- SFmo> SFco> PMor. |
| first_indexed | 2024-12-14T00:01:57Z |
| format | Article |
| id | doaj.art-0d2e86ae54de4731855aa590e0438e7d |
| institution | Directory Open Access Journal |
| issn | 0366-6913 1678-4553 |
| language | English |
| last_indexed | 2024-12-14T00:01:57Z |
| publishDate | 2003-01-01 |
| publisher | Associação Brasileira de Cerâmica |
| record_format | Article |
| series | Cerâmica |
| spelling | doaj.art-0d2e86ae54de4731855aa590e0438e7d2022-12-21T23:26:16ZengAssociação Brasileira de CerâmicaCerâmica0366-69131678-45532003-01-01493094854Study of the performance of four repairing material systems for hydraulic structures of concrete damsKormann A. C. M.Portella K. F.Pereira P. N.Santos R. P.Four types of repairing materials are studied as function of either a conventional concrete or a reference-concrete (RefC), these are: polymer-modified cement mortar (PMor), steel fiber concrete (SFco), epoxy mortar (EMor) and silica fume mortar (SFmo), to be applied in hydraulic structures surfaces subjected to a high velocity water flow. Besides the mechanical requests and wearing resistance of hydraulic concrete dam structures, especially the spillway surfaces, the high solar radiation, the environmental temperature and wet and dry cycles, contribute significantly to the reduction of their lifespan. RefC and the SFco were developed based on a usual concrete mixture used in slabs of spillways. The average RefC mixture used was 1: 1.61: 2.99: 0.376, with Pozzolan-modified Portland cement consumption of 425 kg/m³. EMor and PMor mixtures followed the information given by the manufacturers and lab experience. Tests on concrete samples were carried out in laboratory simulating normally found environmental situations in order to control the mechanical resistance and the aging imposed conditions, such as solar radiation and humidity. Also, physicochemical characterizing tests were made for all used materials. From the analyzed results, two of them presented a higher performance: the EMor and SFmo. SFco presented good adherence to the RefC and good mechanical performance. However, it also presented apparent metal corrosion in humidity tests, being indicated for use, with caution, as an intermediate layer in underwater repairs. In a general classification, considering all tests, including their field applications, the better performance material systems were EMor- SFmo> SFco> PMor.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132003000100011concrete repairmortarabrasiondamspillwayepoxy mortarsilica fumesteel fiberconcrete modified polymer |
| spellingShingle | Kormann A. C. M. Portella K. F. Pereira P. N. Santos R. P. Study of the performance of four repairing material systems for hydraulic structures of concrete dams Cerâmica concrete repair mortar abrasion dam spillway epoxy mortar silica fume steel fiber concrete modified polymer |
| title | Study of the performance of four repairing material systems for hydraulic structures of concrete dams |
| title_full | Study of the performance of four repairing material systems for hydraulic structures of concrete dams |
| title_fullStr | Study of the performance of four repairing material systems for hydraulic structures of concrete dams |
| title_full_unstemmed | Study of the performance of four repairing material systems for hydraulic structures of concrete dams |
| title_short | Study of the performance of four repairing material systems for hydraulic structures of concrete dams |
| title_sort | study of the performance of four repairing material systems for hydraulic structures of concrete dams |
| topic | concrete repair mortar abrasion dam spillway epoxy mortar silica fume steel fiber concrete modified polymer |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132003000100011 |
| work_keys_str_mv | AT kormannacm studyoftheperformanceoffourrepairingmaterialsystemsforhydraulicstructuresofconcretedams AT portellakf studyoftheperformanceoffourrepairingmaterialsystemsforhydraulicstructuresofconcretedams AT pereirapn studyoftheperformanceoffourrepairingmaterialsystemsforhydraulicstructuresofconcretedams AT santosrp studyoftheperformanceoffourrepairingmaterialsystemsforhydraulicstructuresofconcretedams |