| Title |
Hydration characteristics of Portland blast-furnace slag cement mortar using sulfuricacid neutralized liquid red mud |
| Authors |
강석표(Kang, Suk-Pyo) ; 박규은(Park, Kyu-Eun) ; 김상진(Kim, Sang-jin) |
| DOI |
https://doi.org/10.5659/JAIK.2024.40.1.271 |
| Keywords |
Redmud; liquefied red mud; Slag cement; cement mortar; compressive strength; Industrial by-products |
| Abstract |
In this paper, liquid red mud and sulfuric acid neutralized liquid red mud were manufactured to recycle red mud sludge, a by-product of the
aluminum manufacturing process, and applied to slag cement mortar to examine the possibility of its use as a building material. Liquid red
mud and sulfuric acid neutralization As a result of replacing liquid red mud with slag cement mortar, it was found to have a positive effect
by shortening the initial setting time and improving initial strength. In particular, when sulfuric acid is added to red mud, it reacts with
NaOH to produce a compound in the form of Na2(SO4)3, which acts as a factor in reducing the rapid setting phenomenon of slag cement
mortar added with sulfuric acid-neutralized liquid red mud, reducing the 28-day strength. The results showed higher strength than slag cement
mortar added with liquid red mud. In the XRD analysis results, Xonotlite and Gismondite were identified as the new A peak and Gismondite
as the B peak, which appeared to affect the initial compressive strength results. Therefore, it is believed that sulfuric acid neutralization
liquid red mud using red mud sludge has high utility in the construction industry. |