Title:
Nickel Slag as A Partial Substitution of Fine Aggregate in Concrete
Author(s):
Gabriel
Publication:
Web Session
Volume:
ws_S24_Gabriel.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
3/23/2024
Abstract:
The ferronickel processing process in Indonesia, as the largest nickel producing country in the world, produces large amounts of nickel slag waste. In 2020, more than 13 million metric tons of nickel slag were produced, with a significant increase projected as the electric vehicle battery industry develops. This research aims to evaluate the potential for using nickel slag as an aggregate substitute in concrete mixtures. Nickel slag, with a specific gravity of around 2.90 and a lower absorption rate than M-sand, shows similar characteristics to fine aggregate sand in general. The compressive strength test results show increased performance in concrete with 60% nickel slag as a substitute for fine aggregate. Furthermore, tests using Digital Image Correlation (DIC) showed that the concrete maintained flexural behaviour within normal limits, while the Toxicity Characteristic Leakage Procedure (TCLP) test confirmed that the nickel slag concrete material was safe to use. While these results are promising, further research is needed to explore the optimal use of nickel slag in concrete structural elements, especially for external applications.