The triaxial test of construction and demolition (C&D) materials with different particle sizes and sand contents

doi:10.1080/19648189.2020.1820908

	The triaxial test of construction and demolition (C&D) materials with different particle sizes and sand contents
	Li, Lihua 1; Qin, Langling 1; Xiao, Henglin 1; Hu, Zhi 1; Xu, Guofang 2; Ma, Qiang 1
刊名	EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
	2020-09-25
页码	22
关键词	Construction and demolition materials large-strain triaxial test sand contents particle gradations constitutive model
ISSN号	1964-8189
DOI	10.1080/19648189.2020.1820908
英文摘要	Recycled construction and demolition (C&D) materials are widely used in engineering fills to reduce the pressure on the environment. This study intended to investigate the effect of particle sizes and sand contents on mechanical behavior of recycled C&D materials using triaxial tests. The results demonstrated that the water absorption rate of crushed bricks (CB) was much higher than that of recycled concrete aggregate (RCA), and crushing value of recycled C&D materials was slightly lower than that of natural aggregate (NA). An appropriate amount of sand can effectively improve the particle gradation and maximum dry density of C&D materials. Results from the triaxial test showed that C&D materials with particle sizes smaller than 40 mm have higher porosity and lower strength than that of C&D materials with particle sizes smaller than 20 mm. At low porosity and confining pressure, the stress-strain curve followed a strain-softening trend. Under high confining pressure, the curve exhibited a strain hardening trend. After mixed with a suitable amount of sand, the soil changes from skeleton-void structure to suspended-dense structure, and the overall strength of specimens also increases. Finally, the modified power-law model was found to adequately describe the constitutive behavior of recycled C&D materials.
资助项目	National Natural Science Foundation of China[51678224] ; National Natural Science Foundation of China[51778217] ; National Natural Science Foundation of China[51708190] ; Hubei Provincial Science Foundation for Distinguished Young Scholars[2018CFA063] ; Hubei Central Special Fund for Local Science and Technology Development[2019ZYYD053] ; Hubei Central Special Fund for Local Science and Technology Development[2018ZYYD005] ; National Key R&D Program of China[2016YFC0502208]
WOS研究方向	Engineering
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000573144500001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24842]
专题	中科院武汉岩土力学所
通讯作者	Hu, Zhi
作者单位	1.Hubei Univ Technol, Sch Civil Engn Architecture & Environm, Wuhan, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China
推荐引用方式 GB/T 7714	Li, Lihua,Qin, Langling,Xiao, Henglin,et al. The triaxial test of construction and demolition (C&D) materials with different particle sizes and sand contents[J]. EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING,2020:22.
APA	Li, Lihua,Qin, Langling,Xiao, Henglin,Hu, Zhi,Xu, Guofang,&Ma, Qiang.(2020).The triaxial test of construction and demolition (C&D) materials with different particle sizes and sand contents.EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING,22.
MLA	Li, Lihua,et al."The triaxial test of construction and demolition (C&D) materials with different particle sizes and sand contents".EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING (2020):22.