Degradation Resistance and Reliability Analysis of Recycled Aggregate Concrete in a Sulfate Environment
Cao, Hui1; Zhao, Lifeng2; Lu, Chenggong1; Guan, Lijuan1; Qiao, Hongxia1; Li, Qiong1
2020-03-16
Source PublicationADVANCES IN MATERIALS SCIENCE AND ENGINEERING
ISSN1687-8434
Volume2020
AbstractResistance to sulfate degradation is an important index used to measure concrete's durability. In this study, recycled aggregate concrete (RAC) with a 0%, 30%, and 50% recycled coarse aggregate substitution rate and a 0% and 15% recycled fine aggregate replacement rate was used as the research object, and its degradation resistance was evaluated by the mass loss rate and the relative dynamic modulus of elasticity. The degradation products were studied and analyzed with SEM scanning electron microscopy and XRD phase analysis. The relative dynamic modulus of elasticity was selected as the degradation index, the RAC concrete's degradation resistance was modeled by Wiener, and the reliability curve was obtained. The results showed that expansion products, such as gypsum and Ettringite, were produced in RAC concrete in a dry-wet sulfate cycling environment, and such defects as pores and voids were filled in the initial stage. The stress the expansion products exerted in the later stage caused the concrete to crack and peel, which demonstrated that the fluctuation law of mass and the dynamic elastic modulus increased first and then decreased. The recycled coarse aggregate substitution ratio's effect on RAC concrete is higher than that of recycled fine aggregate. The reliability curve established by the Wiener model can reflect the reliability of RAC concrete under different cycles well and can obtain RAC concrete's sulfate degradation resistance life with different aggregate substitution rates.
DOI10.1155/2020/5217215
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51868044][51468039] ; Gansu Natural Science Fund Project[2017GS10844]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000522979800004
PublisherHINDAWI LTD
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64303
Collection土木工程学院
Corresponding AuthorCao, Hui; Zhao, Lifeng
Affiliation1.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou, Gansu, Peoples R China
2.Lanzhou Univ Technol, Sch Design Art, Lanzhou, Gansu, Peoples R China
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
GB/T 7714
Cao, Hui,Zhao, Lifeng,Lu, Chenggong,et al. Degradation Resistance and Reliability Analysis of Recycled Aggregate Concrete in a Sulfate Environment[J]. ADVANCES IN MATERIALS SCIENCE AND ENGINEERING,2020,2020.
APA Cao, Hui,Zhao, Lifeng,Lu, Chenggong,Guan, Lijuan,Qiao, Hongxia,&Li, Qiong.(2020).Degradation Resistance and Reliability Analysis of Recycled Aggregate Concrete in a Sulfate Environment.ADVANCES IN MATERIALS SCIENCE AND ENGINEERING,2020.
MLA Cao, Hui,et al."Degradation Resistance and Reliability Analysis of Recycled Aggregate Concrete in a Sulfate Environment".ADVANCES IN MATERIALS SCIENCE AND ENGINEERING 2020(2020).
Files in This Item:
There are no files associated with this item.
Related Services
Usage statistics
Google Scholar
Similar articles in Google Scholar
[Cao, Hui]'s Articles
[Zhao, Lifeng]'s Articles
[Lu, Chenggong]'s Articles
Baidu academic
Similar articles in Baidu academic
[Cao, Hui]'s Articles
[Zhao, Lifeng]'s Articles
[Lu, Chenggong]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Cao, Hui]'s Articles
[Zhao, Lifeng]'s Articles
[Lu, Chenggong]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.