Degradation Resistance and Reliability Analysis of Recycled Aggregate Concrete in a Sulfate Environment

doi:10.1155/2020/5217215

IR > 土木工程学院

	Degradation Resistance and Reliability Analysis of Recycled Aggregate Concrete in a Sulfate Environment
	Cao, Hui1 ; Zhao, Lifeng 2; Lu, Chenggong 1; Guan, Lijuan 1; Qiao, Hongxia1 ; Li, Qiong1
	2020-03-16
发表期刊	ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
ISSN	1687-8434
卷号	2020
摘要	Resistance 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.
DOI	10.1155/2020/5217215
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51868044][51468039] ; Gansu Natural Science Fund Project[2017GS10844]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000522979800004
出版者	HINDAWI LTD
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/64303
专题	土木工程学院
通讯作者	Cao, Hui; Zhao, Lifeng
作者单位	1.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Design Art, Lanzhou, Gansu, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 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).