CARBONATION AND CORROSION POTENTIAL OF STEEL REINFORCEMENT IN POROUS CONCRETE
As porous concrete has acoustic and drainage characteristics, it is used in many concrete structures, such as pavements, reinforced panels, and so on. In this research, the mechani...
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| Format: | Article |
| Language: | fas |
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Sharif University of Technology
2017-02-01
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| Series: | مهندسی عمران شریف |
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| Online Access: | https://sjce.journals.sharif.edu/article_1071_428d7cdff08bc2fc622c8e1f10b10619.pdf |
| _version_ | 1797733836508889088 |
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| author | A. M.Abbasi |
| author_facet | A. M.Abbasi |
| author_sort | A. M.Abbasi |
| collection | DOAJ |
| description | As porous concrete has acoustic and drainage characteristics, it is used in many concrete structures, such as pavements, reinforced panels, and so on. In this research, the mechanical characteristics, carbonation and corrosion potential of embedded steel reinforcement, such as compressive strength, percent of carbonation, capillary absorption coefficient and corrosion potential, are investigated. The hydrophobic agent is poured into some mixtures to evaluate the effect of this admixture on the hardened specification of concrete.It is known from results that all porous mixtures are very sensitive to the carbonation process because of their porous structure and the entry of carbon dioxide at the full depth of these concretes. Although the hydrophobic agent
has no effect on the structure of concrete, for decreasing the saturation percent of capillary pores, these agents can decrease the rate of concrete carbonation. For porous structures of this kind of concrete, and the small thickness of paste layer around the steel reinforcement in comparison with conventional concrete, the rate of the carbonation process in porous concrete is faster than in conventional concrete. The results show that application of a hydrophobic agent causes a decrease in capillary absorption coefficient, so, the probability of the presence of water for initiation and expansion of the corrosion process is decreased. It is found that the capillary absorption coefficient has a linear relation with corrosion potential, wherein increasing the capillary absorption coefficient cause an increase in corrosion potential in the reinforcement of porous concrete, espectively.Therefore, usage of a hydrophobic agent in porous concrete mixtures not only causes a decrease in the rate of carbonation, but may also propagate the time of initial corrosion. |
| first_indexed | 2024-03-12T12:35:20Z |
| format | Article |
| id | doaj.art-7feebe57a47b418eb22971a1aecc363b |
| institution | Directory Open Access Journal |
| issn | 2676-4768 2676-4776 |
| language | fas |
| last_indexed | 2024-03-12T12:35:20Z |
| publishDate | 2017-02-01 |
| publisher | Sharif University of Technology |
| record_format | Article |
| series | مهندسی عمران شریف |
| spelling | doaj.art-7feebe57a47b418eb22971a1aecc363b2023-08-29T04:27:44ZfasSharif University of Technologyمهندسی عمران شریف2676-47682676-47762017-02-0132.24.11091141071CARBONATION AND CORROSION POTENTIAL OF STEEL REINFORCEMENT IN POROUS CONCRETEA. M.Abbasi0Dept. of Civil Engineering Payame Noor UniversityAs porous concrete has acoustic and drainage characteristics, it is used in many concrete structures, such as pavements, reinforced panels, and so on. In this research, the mechanical characteristics, carbonation and corrosion potential of embedded steel reinforcement, such as compressive strength, percent of carbonation, capillary absorption coefficient and corrosion potential, are investigated. The hydrophobic agent is poured into some mixtures to evaluate the effect of this admixture on the hardened specification of concrete.It is known from results that all porous mixtures are very sensitive to the carbonation process because of their porous structure and the entry of carbon dioxide at the full depth of these concretes. Although the hydrophobic agent has no effect on the structure of concrete, for decreasing the saturation percent of capillary pores, these agents can decrease the rate of concrete carbonation. For porous structures of this kind of concrete, and the small thickness of paste layer around the steel reinforcement in comparison with conventional concrete, the rate of the carbonation process in porous concrete is faster than in conventional concrete. The results show that application of a hydrophobic agent causes a decrease in capillary absorption coefficient, so, the probability of the presence of water for initiation and expansion of the corrosion process is decreased. It is found that the capillary absorption coefficient has a linear relation with corrosion potential, wherein increasing the capillary absorption coefficient cause an increase in corrosion potential in the reinforcement of porous concrete, espectively.Therefore, usage of a hydrophobic agent in porous concrete mixtures not only causes a decrease in the rate of carbonation, but may also propagate the time of initial corrosion.https://sjce.journals.sharif.edu/article_1071_428d7cdff08bc2fc622c8e1f10b10619.pdfporous concretecorrosioncarbonationhydrophobic agent |
| spellingShingle | A. M.Abbasi CARBONATION AND CORROSION POTENTIAL OF STEEL REINFORCEMENT IN POROUS CONCRETE مهندسی عمران شریف porous concrete corrosion carbonation hydrophobic agent |
| title | CARBONATION AND CORROSION POTENTIAL OF STEEL REINFORCEMENT IN POROUS CONCRETE |
| title_full | CARBONATION AND CORROSION POTENTIAL OF STEEL REINFORCEMENT IN POROUS CONCRETE |
| title_fullStr | CARBONATION AND CORROSION POTENTIAL OF STEEL REINFORCEMENT IN POROUS CONCRETE |
| title_full_unstemmed | CARBONATION AND CORROSION POTENTIAL OF STEEL REINFORCEMENT IN POROUS CONCRETE |
| title_short | CARBONATION AND CORROSION POTENTIAL OF STEEL REINFORCEMENT IN POROUS CONCRETE |
| title_sort | carbonation and corrosion potential of steel reinforcement in porous concrete |
| topic | porous concrete corrosion carbonation hydrophobic agent |
| url | https://sjce.journals.sharif.edu/article_1071_428d7cdff08bc2fc622c8e1f10b10619.pdf |
| work_keys_str_mv | AT amabbasi carbonationandcorrosionpotentialofsteelreinforcementinporousconcrete |