The Effect of Activators on the Mechanical Properties and Microstructure of Alkali-Activated Nickel Slag
Joint Authors
Zhang, Lingling
Xu, Liwei
Wang, Xuefang
Guan, Can
Wu, Wenda
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-06-29
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
In order to mitigate problems associated with environmental pollution, alkali-activated nickel slags (AANSs) may be used as an alternative to cementitious material.
However, the understanding of their mechanical properties and microstructure is currently very limited.
This paper therefore explores the influence of different types and contents of three solid alkali activators, Na2SiO3, NaOH, and Na2SiO3/Na2CO3, on the compressive strength of one-part AANS.
Their microstructure, hydration components, and pore structure are analyzed by means of a scanning electron microscope, an energy-dispersive spectrometer, an X-ray diffractometer, an infrared spectrometer, and a mercury analyzer.
The results show that the AANS with an Na2SiO3/Na2CO3 activator has a denser microstructure, lower porosity, and a smaller pore size when compared with the AANS with the Na2SiO3 or NaOH activators.
Consequently, the compressive strength of the Na2SiO3/Na2CO3 sample reached a higher compressive strength (96 MPa) than that activated by Na2SiO3 or NaOH.
This strength is optimal as well as more economical as Na2O, which increased from 0.107 mol to 0.123 mol, contributes little to compressive strength.
The final part of the article discusses an optimal design for the engineering application of one-part AANS.
American Psychological Association (APA)
Xu, Liwei& Wang, Xuefang& Guan, Can& Wu, Wenda& Zhang, Lingling. 2020. The Effect of Activators on the Mechanical Properties and Microstructure of Alkali-Activated Nickel Slag. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1120977
Modern Language Association (MLA)
Xu, Liwei…[et al.]. The Effect of Activators on the Mechanical Properties and Microstructure of Alkali-Activated Nickel Slag. Advances in Civil Engineering No. 2020 (2020), pp.1-17.
https://search.emarefa.net/detail/BIM-1120977
American Medical Association (AMA)
Xu, Liwei& Wang, Xuefang& Guan, Can& Wu, Wenda& Zhang, Lingling. The Effect of Activators on the Mechanical Properties and Microstructure of Alkali-Activated Nickel Slag. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1120977
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1120977