Study on axial compressive behavior and damage constitutive model of manufactured sand concrete based on fluidity optimization

doi:10.1016/j.conbuildmat.2022.128176

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	Study on axial compressive behavior and damage constitutive model of manufactured sand concrete based on fluidity optimization
	Han, Zhao 2; Zhang, Yunsheng 1,2; Qiao, Hongxia 1,2; Feng, Qiong 1,2; Xue, Cuizhen 1,2; Shang, Minggang 2
刊名	Construction and Building Materials
	2022-08-22
卷号	345
关键词	Concrete mixtures Elastic moduli Fluidity Sand Stress-strain curves Constitutive relations Damage Fluidity optimization Initial damage Manufactured sand concretes Optimisations Pore content Pores structure Slump loss Water reducers
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2022.128176
英文摘要	Due to the adsorption effect of manufactured sand on water reducer, the method of adding water reducer is often used to improve the fluidity of concrete mixture, which may change the strength of manufactured sand concrete. This paper systematically studies the manufactured sand concrete with different strength grades of C30, C40, C50, C60, C70, C80 prepared with basic water reducer dosage (1 time) and optimized water reducer dosage (1.65 times), and designs slump, slump loss, uniaxial compression and pore content tests for manufactured sand concretes with the same strength grade. The results show that optimized dosage of water reducer can significantly increase the fluidity, peak stress and elastic modulus of manufactured sand concretes with the same strength grade and reduce their slump loss, peak strain and pore content. Combined with Lemaitre damage mechanism, the total damage of manufactured sand concrete is divided into initial damage and load damage. The initial damage is caused by different fluidity of manufactured sand concrete. The greater the fluidity, the less initial damage will be. The influence of initial damage on the concrete stress-strain relationship is analyzed. As the initial damage increases, the total damage will increase, the strength and elastic modulus of the concrete will decrease. This is due to the fluidity changes the pore structure inside the concrete. © 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:000842933600003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159073]
专题	土木工程学院
作者单位	1.State Key Laboratory of High Performance Civil Engineering Materials, Lanzhou; 730050, China 2.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Han, Zhao,Zhang, Yunsheng,Qiao, Hongxia,et al. Study on axial compressive behavior and damage constitutive model of manufactured sand concrete based on fluidity optimization[J]. Construction and Building Materials,2022,345.
APA	Han, Zhao,Zhang, Yunsheng,Qiao, Hongxia,Feng, Qiong,Xue, Cuizhen,&Shang, Minggang.(2022).Study on axial compressive behavior and damage constitutive model of manufactured sand concrete based on fluidity optimization.Construction and Building Materials,345.
MLA	Han, Zhao,et al."Study on axial compressive behavior and damage constitutive model of manufactured sand concrete based on fluidity optimization".Construction and Building Materials 345(2022).