UM
External sulfate attack to reinforced concrete under drying-wetting cycles and loading condition: Numerical simulation and experimental validation by ultrasonic array method
Zhang, Jinrui; Sun, Ming; Hou, Dongshuai; Li, Zongjin
2017-05-15
Source PublicationCONSTRUCTION AND BUILDING MATERIALS
ISSN0950-0618
Volume139Pages:365-373
AbstractIn this paper, an innovative mathematic model dealing with the hysteresis effect of evaporation of pore solution and the nonlinear relationship between diffusivity of moisture and saturation degree of pores solution is established to describe the sulfate attack to reinforced concrete with drying-wetting cycles. The coupling effects of sulfate attack and external loading condition are investigated using a four point -bending experiment on a reinforced concrete beam and compared with the model predictions. In the experiments, ultrasonic array method is employed to detect the change of the field of modulus of elasticity due to the damage in concrete under sulfate attack coupled with loading condition. The external loading, resulting in tensile strain inside concrete matrix, accelerates the degradation process of concrete subjected to sulfate attack. The modulus variation of concrete under sulfate attack with loading exhibits two apparent stages: (1) the enhancing stage of ettringite crystallization and (2) weakening stage due to overexpansion. The experimental results verified the rationality and validity of the diffusion model proposed in this study, considering the coupling effects of external sulfate attack and loading condition. (C) 2017 Elsevier Ltd. All rights reserved.
KeywordSulfate attack Drying-wetting cycles Diffusion Concrete Ultrasonic array method
DOI10.1016/j.conbuildmat.2017.02.064
URLView the original
Indexed BySCI
Language英语
WOS Research AreaConstruction & Building Technology ; Engineering ; Materials Science
WOS SubjectConstruction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS IDWOS:000398871300034
PublisherELSEVIER SCI LTD
The Source to ArticleWOS
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Cited Times [WOS]:15   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Recommended Citation
GB/T 7714
Zhang, Jinrui,Sun, Ming,Hou, Dongshuai,et al. External sulfate attack to reinforced concrete under drying-wetting cycles and loading condition: Numerical simulation and experimental validation by ultrasonic array method[J]. CONSTRUCTION AND BUILDING MATERIALS,2017,139:365-373.
APA Zhang, Jinrui,Sun, Ming,Hou, Dongshuai,&Li, Zongjin.(2017).External sulfate attack to reinforced concrete under drying-wetting cycles and loading condition: Numerical simulation and experimental validation by ultrasonic array method.CONSTRUCTION AND BUILDING MATERIALS,139,365-373.
MLA Zhang, Jinrui,et al."External sulfate attack to reinforced concrete under drying-wetting cycles and loading condition: Numerical simulation and experimental validation by ultrasonic array method".CONSTRUCTION AND BUILDING MATERIALS 139(2017):365-373.
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