Freezing-Thawing Damage Mechanism and Evolution Model of Concrete Mixed with CWCPM

doi:10.12141/j.issn.1000-565X.190272

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Freezing-Thawing Damage Mechanism and Evolution Model of Concrete Mixed with CWCPM
	Xue, Cuizhen 1,2; Shen, Aiqin 2; Qiao, Hongxia 1
刊名	Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science)
	2020-03-01
卷号	48 期号:3 页码:136-144
关键词	Cements Compressive strength Deterioration Durability Freezing Molecular structure Piles Pore structure Thawing Water conservation Concrete specimens Construction wastes Deterioration mechanism Evolution modeling Freezing thawing cycles Laboratory experiments Microscopic structures Performance deterioration
ISSN号	1000565X
DOI	10.12141/j.issn.1000-565X.190272
英文摘要	The pile-up of significant amount of construction waste and the deterioration of the durability of cement concrete under freezing-thawing cycling are two major challenges in civil engineering.In order to improve the reuse rate of the construction waste and to have better understanding of the deterioration mechanism of concrete mixed with construction waste (brick powder) composite powder materials (CWCPM) under freezing-thawing condition, laboratory experiment and theoretical analysis were carried out.The effect of different factors on the macroscopic performance deterioration of concrete was investigated and the freezing-thawing damage evolution model of concrete mixed with CWCPM was established by multifactor analysis.The microscopic structure and appearance and pore structure of the concrete were also analyzed, and the deterioration mechanism was revealed.The results show that the degree of freezing-thawing damage increased with the increase of water cement ratio, the number of freezing-thawing cycles and the concentration of the salt solution.The anti-frost performance of the concrete was improved by the CWCPM.Compared with the control specimen, the amount of stripping per unit area and the compressive strength of the concrete specimen with 30% CWCPM decreased by 27.1% and increased by 6.2% respectively, after 50 cycles of freezing-thawing.The freezing-thawing damage evolution model based on macroscopic test results can predict the frost resistance of concrete accurately.In essence, the deterioration of the concrete under freezing-thawing condition is a physical process during which its microscopic structure gradually become loose and its pore structure become worse. © 2020, Chemical Industry Press. All right reserved.
语种	中文
出版者	South China University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150994]
专题	土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; Gansu; 730050, China; 2.School of Highway, Chang'an University, Xi'an; Shaanxi; 710064, China
推荐引用方式 GB/T 7714	Xue, Cuizhen,Shen, Aiqin,Qiao, Hongxia. Freezing-Thawing Damage Mechanism and Evolution Model of Concrete Mixed with CWCPM[J]. Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science),2020,48(3):136-144.
APA	Xue, Cuizhen,Shen, Aiqin,&Qiao, Hongxia.(2020).Freezing-Thawing Damage Mechanism and Evolution Model of Concrete Mixed with CWCPM.Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science),48(3),136-144.
MLA	Xue, Cuizhen,et al."Freezing-Thawing Damage Mechanism and Evolution Model of Concrete Mixed with CWCPM".Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) 48.3(2020):136-144.