Durability of thermal insulating bio-based lightweight concrete: Understanding of heat treatment on bio-aggregates

doi:10.1016/j.conbuildmat.2020.121800

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所

	Durability of thermal insulating bio-based lightweight concrete: Understanding of heat treatment on bio-aggregates
	Wu, Fan 2,3; Yu, Qingliang 1,2; Liu, Changwu 4
刊名	CONSTRUCTION AND BUILDING MATERIALS
	2021
卷号	269 页码:121800
关键词	Bio-based lightweight concrete Bio-aggregates Heat treatment Cement hydration Thermal conductivity Drying shrinkage Freeze-thaw resistance
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2020.121800
通讯作者	Yu, Qingliang(q.yu@bwk.tue.nl) ; Liu, Changwu(liuchangwu@scu.edu.cn)
产权排序	2
文献子类	Article
英文摘要	The organic matter, surface properties and biodegradation of bio-based aggregates are the main factors for their poor performance of bio-based lightweight concrete. In the present study, heat-treatment is applied to bio-aggregates for reducing their negative impacts on cement hydration and performance of thermal insulating bio-based lightweight concrete. The results show that heat-treated bio-aggregates have reduced negative impacts on cement hydration by the decomposition of organic matter and increase of the pH of the leachate, and significantly improves the mechanical strength of concrete. The 28-day compressive strength and flexural strength of heat-treated apricot shell (HAS) concrete increase by 50.2% and 87.7%, respectively, compared to the untreated apricot shell (AS) concrete. The bio-based lightweight concrete in this study has an excellent thermal insulation property, and the thermal conductivity varies from 0.56 Wfinl< and 1.25 W/m.K. Moreover, the heat-treated bio-based aggregate significantly reduces the drying shrinkage of concrete. At 108 days, the drying shrinkage of concrete containing heat-treated aggregates reduces by 29.2%-36.1%. Besides, the heat-treated bio-based aggregate enhances the resistance to freeze-thaw cycles, attributed to the reduced micro-cracks and porosity of concrete. Therefore, heat treatment can improve the properties of bio-based aggregates and significantly increase the durability of thermal insulating bio-based lightweight concrete. (C) 2020 The Authors. Published by Elsevier Ltd.
电子版国际标准刊号	1879-0526
资助项目	China Scholarship Council (CSC)[201806240037] ; Sichuan University ; Eindhoven University of Technology
WOS关键词	OIL PALM SHELL ; DRYING SHRINKAGE BEHAVIOR ; MECHANICAL-PROPERTIES ; APRICOT SHELL ; ACTIVATED CARBON ; HIGH-TEMPERATURE ; COCONUT SHELL ; PEACH SHELL ; PERFORMANCE ; HYDRATION
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000604773000126
资助机构	China Scholarship Council (CSC) ; Sichuan University ; Eindhoven University of Technology
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/55207]
专题	中国科学院水利部成都山地灾害与环境研究所
通讯作者	Yu, Qingliang; Liu, Changwu
作者单位	1.School of Civil Engineering, Wuhan University, No.299 Bayi Road, Wuchang District, Wuhan 430072, PR China; 2.Department of the Built Environment, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, the Netherlands; 3.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, No.9 Section 4, Renmin South Road, Chengdu 610041, PR China; 4.College of Water Resource and Hydropower, Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu 610065, PR China
推荐引用方式 GB/T 7714	Wu, Fan,Yu, Qingliang,Liu, Changwu. Durability of thermal insulating bio-based lightweight concrete: Understanding of heat treatment on bio-aggregates[J]. CONSTRUCTION AND BUILDING MATERIALS,2021,269:121800.
APA	Wu, Fan,Yu, Qingliang,&Liu, Changwu.(2021).Durability of thermal insulating bio-based lightweight concrete: Understanding of heat treatment on bio-aggregates.CONSTRUCTION AND BUILDING MATERIALS,269,121800.
MLA	Wu, Fan,et al."Durability of thermal insulating bio-based lightweight concrete: Understanding of heat treatment on bio-aggregates".CONSTRUCTION AND BUILDING MATERIALS 269(2021):121800.