Durability of coral aggregate concrete under coupling action of sulfate, chloride and drying-wetting cycles

doi:10.1016/j.cscm.2022.e01003

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	Durability of coral aggregate concrete under coupling action of sulfate, chloride and drying-wetting cycles
	Huang, Daguan 2; Niu, Ditao 3; Su, Li 1; Pan, Du 3,4; Liu, Yunhe 2
刊名	Case Studies in Construction Materials
	2022-06-01
卷号	16
关键词	Basalt Compressive strength Concrete aggregates Corrosion resistance Deterioration Drying Elastic moduli Sulfur compounds Wetting Aggregate concrete Basalt fiber Concrete specimens Coral aggregate concrete Coupling actions Drying-wetting Drying-wetting cycle Exposure-time Sulfate attack Sulfate-chloride
ISSN号	2214-5095
DOI	10.1016/j.cscm.2022.e01003
英文摘要	This paper investigates the deterioration progress of coral aggregate concrete (CAC) under the coupling action of sulfate, chloride and drying–wetting cycles. Three strength grades (C25, C30, C40) of CAC specimens were designed for experimental analysis. In addition, ordinary aggregate concrete (OAC) specimens were prepared as the reference group. The relative dynamic elastic modulus and the relative compressive strength of CAC increases first and then decreases with increasing exposure time, while the mass loss rate shows the opposite trend. The CAC with high strength grade has strong corrosion resistance, and the corrosion resistance of CAC is obviously lower compared to OAC at same strength grade. The addition of basalt fiber into CAC can delay the cracking and maintain the integrity. With increasing exposure time, the damage depth increases exponentially. The chloride concentration can be divided into two phases: first increase and then decrease. Basalt fiber can significantly reduce the chloride diffusion coefficient of CAC. The erosion products are ettringite and gypsum for OAC and CAC; in addition, Friedel's salt is also found in CAC. © 2022 The Authors
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:000788073600005
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157903]
专题	兰州理工大学
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China; 2.School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an, China; 3.College of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an, China; 4.Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clearwater Bay, Hong Kong, China
推荐引用方式 GB/T 7714	Huang, Daguan,Niu, Ditao,Su, Li,et al. Durability of coral aggregate concrete under coupling action of sulfate, chloride and drying-wetting cycles[J]. Case Studies in Construction Materials,2022,16.
APA	Huang, Daguan,Niu, Ditao,Su, Li,Pan, Du,&Liu, Yunhe.(2022).Durability of coral aggregate concrete under coupling action of sulfate, chloride and drying-wetting cycles.Case Studies in Construction Materials,16.
MLA	Huang, Daguan,et al."Durability of coral aggregate concrete under coupling action of sulfate, chloride and drying-wetting cycles".Case Studies in Construction Materials 16(2022).