干旱区生态环境知识资源中心(Arid): Experimental study on mechanical properties, hydration kinetics, and hydration product characteristics of aeolian sand paste-like materials

Arid

DOI	10.1016/j.conbuildmat.2021.124601
	Experimental study on mechanical properties, hydration kinetics, and hydration product characteristics of aeolian sand paste-like materials
	Shao, Xiaoping; Sun, Jianpeng; Xin, Jie; Zhao, Bingchao; Sun, Wuliang; Li, Longqing; Tang, Renlong; Tian, Chuang; Xu, Baowa
通讯作者	Shao, XP (corresponding author), Xian Univ Sci & Technol, Energy Sch, Xian 710054, Peoples R China. ; Xin, J (corresponding author), Chinese Acad Sci, Inst Rock & Soil Mech, China State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China.
来源期刊	CONSTRUCTION AND BUILDING MATERIALS
ISSN	0950-0618
EISSN	1879-0526
出版年	2021
卷号	303
英文摘要	Using fly ash (FA), aeolian sand (AS), cement, and mixing water as filling materials for making the paste-like filling mining can not only effectively control the surface subsidence and solve the three-underground mining coal pressure but also solve the environmental problems caused by the solid wastes, so as to realize the sustainable utilization of solid waste. The utilization of a large amount of AS resources can control land desertification, and the sale of aeolian sand can bring considerable economic benefits to Yuyang district. Hence, in this study, different ASPM samples were produced by varying the content of FA (0-30 wt%) and the curing times (3, 7, 14 and 28 days). The mechanical strength test, hydration kinetics test and microscopic test of aeolian sand paste-like materials (ASPM) was studied. The results showed that, according to the typical underground mining, the uniaxial compressive strength (UCS) of the backfill, cured for 28 days, was generally between 0.7 and 2.0 MPa, which can provide good roof support. In this study, the minimum strength of the ASPM reached 4.43 MPa (C-FA0), so the ASPM met the requirements of strength performance. Secondly, the hydration exothermic process of ASPM was divided into five different stages, and the influence of FA content on hydration kinetics was analyzed. For example, in the acceleration stage of ASPM, there was a positive correlation between the FA content, exothermic heat, and exothermic rate. The possible reason was that the particle size of FA was finer than that of AS, and the hydration reaction was more sufficient. In addition, the microscopic morphology and the characteristics of hydration products of ASPM were also studied. It is an important prerequisite for industrial field practice to study the mechanical properties, hydration characteristics and hydration product of ASPM.
英文关键词	ASPM Strength characteristics Hydration kinetics Microscopic morphology Hydration product
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000696931300003
WOS关键词	FLY-ASH ; SUPERPLASTICIZER
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362904
作者单位	[Shao, Xiaoping; Sun, Jianpeng; Zhao, Bingchao; Sun, Wuliang; Li, Longqing; Tang, Renlong; Tian, Chuang; Xu, Baowa] Xian Univ Sci & Technol, Energy Sch, Xian 710054, Peoples R China; [Shao, Xiaoping; Zhao, Bingchao; Li, Longqing; Tang, Renlong] Minist Educ China, Key Lab Western Mines & Hazards Prevent, Xian 710054, Peoples R China; [Xin, Jie] Chinese Acad Sci, Inst Rock & Soil Mech, China State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China; [Xin, Jie] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shao, Xiaoping,Sun, Jianpeng,Xin, Jie,et al. Experimental study on mechanical properties, hydration kinetics, and hydration product characteristics of aeolian sand paste-like materials[J],2021,303.
APA	Shao, Xiaoping.,Sun, Jianpeng.,Xin, Jie.,Zhao, Bingchao.,Sun, Wuliang.,...&Xu, Baowa.(2021).Experimental study on mechanical properties, hydration kinetics, and hydration product characteristics of aeolian sand paste-like materials.CONSTRUCTION AND BUILDING MATERIALS,303.
MLA	Shao, Xiaoping,et al."Experimental study on mechanical properties, hydration kinetics, and hydration product characteristics of aeolian sand paste-like materials".CONSTRUCTION AND BUILDING MATERIALS 303(2021).