Accelerated damage and deterioration mechanism of concrete in saline soil area and reliability analysis based on Wiener process

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	Accelerated damage and deterioration mechanism of concrete in saline soil area and reliability analysis based on Wiener process
	Lu, Chenggong 3; Qiao, Hongxia 1,3; Wei, Zhiqiang 2; Li, Kan 3; Fu, Yong 3
刊名	Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology
	2021-03-01
卷号	50 期号:2 页码:265-272
关键词	Compressive strength Concretes Cracks Crystals Deterioration Durability Dynamics Elastic moduli Erosion Expansion Freezing Petroleum reservoir evaluation Quality control Random processes Soils Stochastic systems Thawing Underground corrosion Degree of reliability Deterioration mechanism Dynamic elastic moduli Evaluation parameters Macroscopic evaluation indexes Microscopic evaluation Multiple damage factors Reliability degradation
ISSN号	10001964
英文摘要	In order to reveal the durability deterioration mechanism and service life of concrete in the western saline soil area better, an accelerated indoor test including damage factors such as corrosion salt erosion, freeze-thaw damage, dry-wet cycle and ultraviolet radiation was designed. Macroscopic evaluation indexes such as dynamic elastic modulus evaluation parameters, quality evaluation parameters and compressive strength as well as microscopic evaluation indexes such as SEM and XRD were used to reveal jointly the deterioration mechanism of concrete durability. A nonmonotone Wiener stochastic process was proposed for modeling. The results show that: Under the coupling action of multiple damage factors, cracks and honeycomb-like pores appear on the surface of concrete internal gel, and spicules, and there are needle-like, rod-like, and chip-like crystals growing from the internal defects. Corrosion products include crystals such as ettringite, gypsum, and non-gelling brucite which consume the internal gel and produce expansion stress. The physical crystallization produced by the dry-wet cycles and the expansion-contraction stress produced by the freeze-thaw cycles intensify the formation and development of cracks. The reliability life curve can well describe the erosion degradation process of concrete under the action of multiple damage factors of saline soil. Among the degradation indexes, the reliability life obtained by quality is the longest, the dynamic elastic modulus is the second, and the reliability degradation life of the strength degradation index is the shortest. The average time of three degradation indexes at 0.35 degree of reliability is taken as the reliability life of concrete under multi damage factors, the indoor accelerated life of C45, C40 and C35 concrete is 182.3, 138.3 and 104.6 days respectively. © 2021, Editorial Board of Journal of CUMT. All right reserved.
语种	中文
出版者	China University of Mining and Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150756]
专题	土木工程学院理学院
作者单位	1.Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Science, Lanzhou University of Technology, Lanzhou; 730050, China 3.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Lu, Chenggong,Qiao, Hongxia,Wei, Zhiqiang,et al. Accelerated damage and deterioration mechanism of concrete in saline soil area and reliability analysis based on Wiener process[J]. Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology,2021,50(2):265-272.
APA	Lu, Chenggong,Qiao, Hongxia,Wei, Zhiqiang,Li, Kan,&Fu, Yong.(2021).Accelerated damage and deterioration mechanism of concrete in saline soil area and reliability analysis based on Wiener process.Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology,50(2),265-272.
MLA	Lu, Chenggong,et al."Accelerated damage and deterioration mechanism of concrete in saline soil area and reliability analysis based on Wiener process".Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology 50.2(2021):265-272.