Engineering and microstructure properties of contaminated marine sediments solidified by high content of incinerated sewage sludge ash

doi:10.1016/j.jrmge.2020.10.002

	Engineering and microstructure properties of contaminated marine sediments solidified by high content of incinerated sewage sludge ash
	Li, Jiang-Shan 1,2,3; Zhou, Yifan 4; Chen, Xin 1,2; Wang, Qiming 4; Xue, Qiang 1,3; Tsang, Daniel C. W.4; Poon, Chi Sun 2,4
刊名	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
	2021-06-01
卷号	13 期号:3 页码:643-652
关键词	Contaminated marine sediment (CMS) Incinerated sewage sludge ash (ISSA) Solidification/stabilization (S/S) Heavy metals Construction material
ISSN号	1674-7755
DOI	10.1016/j.jrmge.2020.10.002
英文摘要	Management of incinerated sewage sludge ash (ISSA) and dredged contaminated marine sediments (CMSs) is a great challenge for Hong Kong and other coastal cities due to limited landfilling capacity. The present study investigates the use of high content (20% of sediment by mass) of ISSA in combination with cement/lime for solidification/stabilization (S/S) treatment of CMSs to provide a way to reuse the wastes as construction materials. The results showed that ISSA being a porous material was able to absorb a large amount of water rendering a more efficient solidification process of the marine sediment which normally had a very high water content (similar to 80%). The S/S treatment improved the engineering properties of the sediment, but reduced the workability, especially for the lime-treated samples. Lime can be used to replace ordinary Portland cement (OPC) for better heavy metal immobilization and carbon emission reduction. The hardened sediment samples prepared with 10% of lime and 20% of ISSA could attain a strength of 1.6 MPa after 28 d of curing. In addition, leaching tests confirmed that there was no environmental risk induced by these stabilized materials. The formation of hydrated cementitious compounds including calcium silicate hydrate (C-S-H)/calcium aluminate silicate hydrate (C-A-S-H)/ hydrocalumite/calcite was mainly responsible for the strength development in the ISSA/lime-treated sediments. (C) 2021 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V.
资助项目	National Natural Science Foundation of China[51861165104] ; National Natural Science Foundation of China[51625903] ; National Key Research and Development Project[2019YFC1804002]
WOS研究方向	Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000656383700013
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27461]
专题	中科院武汉岩土力学所
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.IRSM CAS HK PolyU Joint Lab Solid Waste Sci, Hung Hom, Kowloon, Hong Kong, Peoples R China 3.Hubei Prov Key Lab Contaminated Sludge & Soil Sci, Wuhan 430071, Peoples R China 4.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Li, Jiang-Shan,Zhou, Yifan,Chen, Xin,et al. Engineering and microstructure properties of contaminated marine sediments solidified by high content of incinerated sewage sludge ash[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2021,13(3):643-652.
APA	Li, Jiang-Shan.,Zhou, Yifan.,Chen, Xin.,Wang, Qiming.,Xue, Qiang.,...&Poon, Chi Sun.(2021).Engineering and microstructure properties of contaminated marine sediments solidified by high content of incinerated sewage sludge ash.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,13(3),643-652.
MLA	Li, Jiang-Shan,et al."Engineering and microstructure properties of contaminated marine sediments solidified by high content of incinerated sewage sludge ash".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 13.3(2021):643-652.