Influence of Wind Pressure on the Carbonation of Concrete
Carbonation is one of the major deteriorations that accelerate steel corrosion in reinforced concrete structures. Many mathematical/numerical models of the carbonation process, primarily diffusion-reaction models, have been established to predict the carbonation depth. However, the mass transfer of...
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doaj-bce5ff8aa3404675b092f71fce7ff4c32020-11-24T23:01:56ZengMDPI AGMaterials1996-19442015-07-01884652466710.3390/ma8084652ma8084652Influence of Wind Pressure on the Carbonation of ConcreteDujian Zou0Tiejun Liu1Chengcheng Du2Jun Teng3Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, ChinaShenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, ChinaShenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, ChinaShenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, ChinaCarbonation is one of the major deteriorations that accelerate steel corrosion in reinforced concrete structures. Many mathematical/numerical models of the carbonation process, primarily diffusion-reaction models, have been established to predict the carbonation depth. However, the mass transfer of carbon dioxide in porous concrete includes molecular diffusion and convection mass transfer. In particular, the convection mass transfer induced by pressure difference is called penetration mass transfer. This paper presents the influence of penetration mass transfer on the carbonation. A penetration-reaction carbonation model was constructed and validated by accelerated test results under high pressure. Then the characteristics of wind pressure on the carbonation were investigated through finite element analysis considering steady and fluctuating wind flows. The results indicate that the wind pressure on the surface of concrete buildings results in deeper carbonation depth than that just considering the diffusion of carbon dioxide. In addition, the influence of wind pressure on carbonation tends to increase significantly with carbonation depth.http://www.mdpi.com/1996-1944/8/8/4652concretecarbonationpenetration mass transferwind pressureKlinkenberg effect |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Dujian Zou Tiejun Liu Chengcheng Du Jun Teng |
spellingShingle |
Dujian Zou Tiejun Liu Chengcheng Du Jun Teng Influence of Wind Pressure on the Carbonation of Concrete Materials concrete carbonation penetration mass transfer wind pressure Klinkenberg effect |
author_facet |
Dujian Zou Tiejun Liu Chengcheng Du Jun Teng |
author_sort |
Dujian Zou |
title |
Influence of Wind Pressure on the Carbonation of Concrete |
title_short |
Influence of Wind Pressure on the Carbonation of Concrete |
title_full |
Influence of Wind Pressure on the Carbonation of Concrete |
title_fullStr |
Influence of Wind Pressure on the Carbonation of Concrete |
title_full_unstemmed |
Influence of Wind Pressure on the Carbonation of Concrete |
title_sort |
influence of wind pressure on the carbonation of concrete |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2015-07-01 |
description |
Carbonation is one of the major deteriorations that accelerate steel corrosion in reinforced concrete structures. Many mathematical/numerical models of the carbonation process, primarily diffusion-reaction models, have been established to predict the carbonation depth. However, the mass transfer of carbon dioxide in porous concrete includes molecular diffusion and convection mass transfer. In particular, the convection mass transfer induced by pressure difference is called penetration mass transfer. This paper presents the influence of penetration mass transfer on the carbonation. A penetration-reaction carbonation model was constructed and validated by accelerated test results under high pressure. Then the characteristics of wind pressure on the carbonation were investigated through finite element analysis considering steady and fluctuating wind flows. The results indicate that the wind pressure on the surface of concrete buildings results in deeper carbonation depth than that just considering the diffusion of carbon dioxide. In addition, the influence of wind pressure on carbonation tends to increase significantly with carbonation depth. |
topic |
concrete carbonation penetration mass transfer wind pressure Klinkenberg effect |
url |
http://www.mdpi.com/1996-1944/8/8/4652 |
work_keys_str_mv |
AT dujianzou influenceofwindpressureonthecarbonationofconcrete AT tiejunliu influenceofwindpressureonthecarbonationofconcrete AT chengchengdu influenceofwindpressureonthecarbonationofconcrete AT junteng influenceofwindpressureonthecarbonationofconcrete |
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1725638292599209984 |