Pore structure characteristics and performance of construction waste composite powder-modified concrete

doi:10.1016/j.conbuildmat.2020.121262

CORC > 兰州理工大学 > 兰州理工大学

	Pore structure characteristics and performance of construction waste composite powder-modified concrete
	Guo, Yinchuan 2; Wu, Shengli 2; Lyu, Zhenghua 2; Shen, Aiqin 2; Yin, Lei 2; Xue, Cuizhen 1
刊名	Construction and Building Materials
	2021-02-01
卷号	269
关键词	Chlorine compounds Composite structures Compressive strength Concrete mixing Concrete mixtures Fractal dimension Hydration Mechanical permeability Mixing Scanning electron microscopy Cementitious materials Concrete performance Correlation coefficient Energy dispersive spectrometry Improvement mechanism Structure characteristic Superposition effect Supplementary cementitious material
ISSN号	09500618
DOI	10.1016/j.conbuildmat.2020.121262
英文摘要	The recycling of construction waste composite powder materials (CWCPM) conserves resources and protects the environment. To study the effect of CWCPM as a supplementary cementitious material (SCM) on concrete performance, the mechanical properties, permeability and pore structure characteristics of concrete with CWCPM were investigated at different water-cement ratios, CWCPM mixing amounts and curing ages. The pore axis fractal dimension Df was used to characterize the pore structure, and the inherent correlations among the compressive strength, permeability and pore structure were analyzed. Furthermore, the improvement mechanism of the CWCPM on concrete performance was revealed by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS) analyses. The results show that the incorporation of CWCPM enriched the quantity and types of hydration products and improve the pore structure, providing a complementary superposition effect on the cementitious material. The pore axis fractal dimension Df had a significant correlation with compressive strength and chloride ion permeability coefficients, and the correlation coefficients reached 0.936 and 0.901, respectively. The Df can characterize the pore structure of CWCPM-modified concrete. When the CWCPM mixing amount was 30%, the compressive strength and permeability of concrete were optimal. © 2020 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:000604773000037
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147260]
专题	兰州理工大学
作者单位	1.College of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China 2.School of Highway Engineering, Chang’ an University, Xi'an; 710064, China;
推荐引用方式 GB/T 7714	Guo, Yinchuan,Wu, Shengli,Lyu, Zhenghua,et al. Pore structure characteristics and performance of construction waste composite powder-modified concrete[J]. Construction and Building Materials,2021,269.
APA	Guo, Yinchuan,Wu, Shengli,Lyu, Zhenghua,Shen, Aiqin,Yin, Lei,&Xue, Cuizhen.(2021).Pore structure characteristics and performance of construction waste composite powder-modified concrete.Construction and Building Materials,269.
MLA	Guo, Yinchuan,et al."Pore structure characteristics and performance of construction waste composite powder-modified concrete".Construction and Building Materials 269(2021).