Birnbaum-Saunders Durability Life Prediction Model of Site-Exposed Concrete in the Saline Soil Area

doi:10.1155/2021/7644375

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	Birnbaum-Saunders Durability Life Prediction Model of Site-Exposed Concrete in the Saline Soil Area
	Lu, Chenggong 2; Wei, Zhiqiang 1; Qiao, Hongxia 2,3; Hakuzweyezu, Theogene 2; Li, Kan 2
刊名	ADVANCES IN CIVIL ENGINEERING
	2021-10-25
卷号	2021
ISSN号	1687-8086
DOI	10.1155/2021/7644375
英文摘要	Aiming at the prominent problem of short durability life of concrete in saline soil area and the shortcomings of indoor accelerated test, an outdoor field exposure test was designed. The concrete specimens were semiburied in the Tianshui area with salinized soil characteristics, and nondestructive testing was conducted every 180d (days). The durability evaluation parameters and mechanical performance indexes were selected for macroscopic analysis, and the corrosion mechanism was analyzed by using the SEM image and the XRD phase. The Birnbaum-Saunders model based on physical failure and probability statistics was used for life prediction. The results show that there are rod-shaped and chip-shaped crystals growing from the surface of the gel and the internal holes in the exposed end and the embedded end of the concrete. However, the damage and deterioration of the buried end are more serious than those of the exposed end. The corrosion products mainly included ettringite, gypsum, calcium carbonate, sodium sulfate hydrate, carbosilite, and Friedel's salt. The reliability life curve based on the Birnbaum-Saunders model can describe the whole process of exposed concrete from damage accumulation to failure. In addition, the dynamic modulus degradation index is more sensitive to concrete durability damage, and the life obtained by the Birnbaum-Saunders model is shorter than the quality degradation index. The life obtained by this degradation index is taken as the life of the concrete exposed in the saline soil site, and the concrete life of C30, C40, and C50 is about 3340d, 3930d, and 4360d, respectively.
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000753747400004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155000]
专题	理学院土木工程学院
作者单位	1.Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R China; 3.Lanzhou Univ Technol, Minist Educ, Western Ctr Disaster Mitigat Civil Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Lu, Chenggong,Wei, Zhiqiang,Qiao, Hongxia,et al. Birnbaum-Saunders Durability Life Prediction Model of Site-Exposed Concrete in the Saline Soil Area[J]. ADVANCES IN CIVIL ENGINEERING,2021,2021.
APA	Lu, Chenggong,Wei, Zhiqiang,Qiao, Hongxia,Hakuzweyezu, Theogene,&Li, Kan.(2021).Birnbaum-Saunders Durability Life Prediction Model of Site-Exposed Concrete in the Saline Soil Area.ADVANCES IN CIVIL ENGINEERING,2021.
MLA	Lu, Chenggong,et al."Birnbaum-Saunders Durability Life Prediction Model of Site-Exposed Concrete in the Saline Soil Area".ADVANCES IN CIVIL ENGINEERING 2021(2021).