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

doi:10.1016/j.conbuildmat.2020.121262

	Pore structure characteristics and performance of construction waste composite powder-modified concrete
	Guo, Yinchuan 1; Wu, Shengli 1; Lyu, Zhenghua 1; Shen, Aiqin 1; Yin, Lei 1; Xue, Cuizhen 2
	2021-02-01
发表期刊	Construction and Building Materials
ISSN	09500618
卷号	269
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
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
DOI	10.1016/j.conbuildmat.2020.121262
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS记录号	WOS:000604773000037
出版者	Elsevier Ltd
EI入藏号	20204409424074
EI主题词	Pore structure
EI分类号	408.2 Structural Members and Shapes - 412 Concrete - 802.3 Chemical Operations - 921 Mathematics - 931.2 Physical Properties of Gases, Liquids and Solids
来源库	Compendex
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/147260
专题	兰州理工大学
通讯作者	Wu, Shengli; Lyu, Zhenghua
作者单位	1.Changan Univ, Sch Highway Engn, Xian 710064, Peoples R China; 2.Lanzhou Univ Technol, Coll Civil Engn, Lanzhou 730050, Peoples R 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).