Chloride diffusion behavior and microstructure of basalt-polypropylene hybrid fiber reinforced concrete in salt spray environment

doi:10.1016/j.conbuildmat.2022.126716

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Chloride diffusion behavior and microstructure of basalt-polypropylene hybrid fiber reinforced concrete in salt spray environment
	Su, Li 2; Niu, Ditao 1; Huang, Daguan 3; Luo, Yang 1; Qiao, Hongxia 2; Zhang, Yunsheng 2
刊名	Construction and Building Materials
	2022-03-21
卷号	324
关键词	Chlorine compounds Corrosion resistance Diffusion Erosion Fibers Polypropylenes Pore structure Reinforced concrete Scanning electron microscopy Basalt fiber Basalt-polypropylene hybrid fiber reinforced concrete Chloride concentrations Chloride diffusion Chloride diffusion coefficient Chloride diffusion coefficient prediction model Hybrid fiber-reinforced concrete Prediction modelling Salt spray Salt-spray environment
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2022.126716
英文摘要	The chloride diffusion performances of basalt-polypropylene hybrid fiber reinforced concrete (BPHFRC) in salt spray environment were investigated. The effects of concrete strength, fiber addition form and content on the pore solution pH and chloride concentration were evaluated. The results showed that the stable depth of pore solution pH of BPHFRC increased with the increase of exposure time. The greater the strength of concrete, the slower the decrease rate of pore solution pH with exposure time. The effects of addition form and content of basalt fiber (BF) and polypropylene fiber (PF) on chloride concentration were different. When the fiber content was 0.1%, the addition of BF, PF or hybrid BF-PF could improve the chloride corrosion resistance of concrete. However, addition of 0.2% hybrid BF-PF increased the chloride concentration in the concrete. The apparent chloride diffusion coefficient of BPHFRC decreased with an increase of salt spray erosion time, and exhibited a power function with erosion time. The calculation model of BPHFRC apparent chloride diffusion coefficient was established, and its effectiveness was verified. In addition, the pore structure, phase composition and micromorphology of BPHFRC before and after erosion were performed using RapidAir-457 porosity analyzer, X-ray diffraction and field emission scanning electron microscope, and the influence rules of BF and PF on chloride diffusion properties of concrete was discussed. © 2022 Elsevier Ltd
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000754226100003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157947]
专题	土木工程学院
作者单位	1.College of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an; 710055, China; 2.College of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an; 710048, China
推荐引用方式 GB/T 7714	Su, Li,Niu, Ditao,Huang, Daguan,et al. Chloride diffusion behavior and microstructure of basalt-polypropylene hybrid fiber reinforced concrete in salt spray environment[J]. Construction and Building Materials,2022,324.
APA	Su, Li,Niu, Ditao,Huang, Daguan,Luo, Yang,Qiao, Hongxia,&Zhang, Yunsheng.(2022).Chloride diffusion behavior and microstructure of basalt-polypropylene hybrid fiber reinforced concrete in salt spray environment.Construction and Building Materials,324.
MLA	Su, Li,et al."Chloride diffusion behavior and microstructure of basalt-polypropylene hybrid fiber reinforced concrete in salt spray environment".Construction and Building Materials 324(2022).