干旱区生态环境知识资源中心(Arid): Preparation, characterization, and application of an eco-friendly sand-fixing material largely utilizing coal-based solid waste

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DOI	10.1016/j.jhazmat.2019.03.092
	Preparation, characterization, and application of an eco-friendly sand-fixing material largely utilizing coal-based solid waste
	Peng, Dandan 1; Wang, Yaguang 1; Liu, Xiaoming 1; Tang, Binwen 1; Zhang, Na 2
通讯作者	Liu, Xiaoming ; Zhang, Na
来源期刊	JOURNAL OF HAZARDOUS MATERIALS
ISSN	0304-3894
EISSN	1873-3336
出版年	2019
卷号	373 页码:294-302
英文摘要	The resource utilization of coal-based solid waste (CBSW) is an urgent problem needed to be addressed. This study was based on the principle of intermediate-calcium system to prepare a self-degradable eco-friendly sand-fixing material (SFM) by using CBSW and aeolian sand as main raw materials, and its hydration mechanism and environmental characteristics were investigated. The hydration products of SFM were characterized by XRD, TG-DSC, FTIR, and SEM, and the environmental friendly performances were discussed by leaching test. The results show that the compressive strength of SFM reached 12.4 MPa after 28d when the (CaO + MgO)/(SiO2+ Al2O3) was 0.75. After 150 freeze-thaw cycles, the recorded strength was 8.82 MPa which met the international standards but it get completely degraded into powders after 200 freeze-thaw cycles. The leaching test results indicated that the heavy metals in raw materials were solidified; the SFM before and after complete degradation were all eco-friendly. The main hydration products of SFM were ettringite, C-S-H and C-A-S-H, which play an important effect in strength development and solidification of heavy metals. At the same time, the pilot-scale test would reach the similar results. This work provides an effective solution of resource utilization of CBSW and improving the eco-environment of the desert.
英文关键词	Coal-based solid waste Sand-fixing material Compressive strength Hydration products Environmental friendly performance
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000472691800033
WOS关键词	FLY-ASH ; HYDRATION CHARACTERISTICS ; COMPRESSIVE STRENGTH ; ACID SOIL ; CEMENT ; GANGUE ; BEHAVIOR ; PERFORMANCE ; AGGREGATE ; MECHANISM
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS研究方向	Engineering ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217102
作者单位	1.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China; 2.China Univ Geosci, Sch Mat Sci & Technol, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Peng, Dandan,Wang, Yaguang,Liu, Xiaoming,et al. Preparation, characterization, and application of an eco-friendly sand-fixing material largely utilizing coal-based solid waste[J],2019,373:294-302.
APA	Peng, Dandan,Wang, Yaguang,Liu, Xiaoming,Tang, Binwen,&Zhang, Na.(2019).Preparation, characterization, and application of an eco-friendly sand-fixing material largely utilizing coal-based solid waste.JOURNAL OF HAZARDOUS MATERIALS,373,294-302.
MLA	Peng, Dandan,et al."Preparation, characterization, and application of an eco-friendly sand-fixing material largely utilizing coal-based solid waste".JOURNAL OF HAZARDOUS MATERIALS 373(2019):294-302.