Recycling sediment, calcium carbide slag and ground granulated blast-furnace slag into novel and sustainable cementitious binder for production of eco-friendly mortar

doi:10.1016/j.conbuildmat.2021.124772

	Recycling sediment, calcium carbide slag and ground granulated blast-furnace slag into novel and sustainable cementitious binder for production of eco-friendly mortar
	Kou, Ruitang 1; Guo, Ming-Zhi 1,2; Han, Lin 1; Li, Jiang-Shan 3; Li, Bo 2,4; Chu, Hongqiang 1; Jiang, Linhua 1; Wang, Lin 1; Jin, Weizhun 1; Poon, Chi Sun 5
刊名	CONSTRUCTION AND BUILDING MATERIALS
	2021-10-25
卷号	305 页码:9
关键词	Sediment Calcium carbide slag Ground granulated blast-furnace slag Solid wastes Sustainable development
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2021.124772
英文摘要	The generation of dredged sediments (DS) exerts a heavy burden on the surrounding environment. Traditional landfills of DS not only contaminate the environment, but also waste precious resources. In this study, DS from Taihu Lake, together with calcium carbide slag (CCS) and ground granulated blast-furnace slag (GGBS), was used as supplementary cementitious materials (SCM) to replace cement to develop a novel cementitious binder for the production of mortar. The effects of varying contents of DS, CCS, and GGBS on the properties of the specimens were systematically investigated. The results showed that the incorporation of DS in cement mortar led to a reduction in the flexural and compressive strength at all curing ages in a dosage dependent manner due to a rather weak pozzolanic activity. The addition of GGBS in the specimen significantly increased the 28-d flexural and compressive strength, which was even higher than that of the samples with the same amount of cement. More importantly, this beneficial effect was more obvious in the co-existence of GGBS and CCS because of the formation of more C-S-H gel (with a simultaneously high pH) revealed by XRD, SEM and TG analysis. The optimum mechanical properties were obtained by a combination of 60% OPC, 20% DS, 10% GGBS, and 10% CCS. Whereas, the mix with a higher content of DS (20% OPC, 60%DS, 10% GGBS and 10% CCS) can be potentially used for controlled low-strength materials. The application of the developed product in eco-friendly construction materials can sustainably alleviate the burden of DS, CCS, and GGBS on the environment.
资助项目	Fundamental Research Funds for the Central Universities[2019B16614] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z020012] ; China Postdoctoral Science Foundation[2018M632219] ; Zhejiang Provincial Department of Science and Technology[2020E10018]
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:000696910400001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27935]
专题	中科院武汉岩土力学所
通讯作者	Guo, Ming-Zhi
作者单位	1.Hohai Univ, Coll Mech & Mat, Nanjing, Jiangsu, Peoples R China 2.Univ Nottingham Ningbo China, Key Lab Carbonaceous Wastes Proc & Proc Intensifi, Ningbo 315100, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Univ Nottingham Ningbo China, Dept Civil Engn, Ningbo 315100, Peoples R China 5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Kou, Ruitang,Guo, Ming-Zhi,Han, Lin,et al. Recycling sediment, calcium carbide slag and ground granulated blast-furnace slag into novel and sustainable cementitious binder for production of eco-friendly mortar[J]. CONSTRUCTION AND BUILDING MATERIALS,2021,305:9.
APA	Kou, Ruitang.,Guo, Ming-Zhi.,Han, Lin.,Li, Jiang-Shan.,Li, Bo.,...&Poon, Chi Sun.(2021).Recycling sediment, calcium carbide slag and ground granulated blast-furnace slag into novel and sustainable cementitious binder for production of eco-friendly mortar.CONSTRUCTION AND BUILDING MATERIALS,305,9.
MLA	Kou, Ruitang,et al."Recycling sediment, calcium carbide slag and ground granulated blast-furnace slag into novel and sustainable cementitious binder for production of eco-friendly mortar".CONSTRUCTION AND BUILDING MATERIALS 305(2021):9.