Title:
Utilization of Electric Arc Furnace Slag for CO2 Storage in Mortar using Pressurized CO2 Curing Condition
Author(s):
Indong Jang, Namkon Lee, Hoon Moon, Gijoon Park, Gumsung Ryu, Jungjun Park
Publication:
Symposium Paper
Volume:
362
Issue:
Appears on pages(s):
444-452
Keywords:
carbonation, pressurized CO2 curing, steel slag
DOI:
10.14359/51740902
Date:
6/11/2024
Abstract:
Electric arc furnace slag is a byproduct generated in the steel industry, which can be categorized into oxidizing slag (electric arc furnace oxidizing slag, EOS) and reducing slag (electric arc furnace reducing slag, ERS) depending on the manufacturing process. These slags contain ions such as Ca, Si, and Mg in unstable states, allowing them to form minerals through reactions with CO2. In this study, we investigated the carbonation efficiency of cement mortar incorporating these slags as supplementary mineral admixture and aggregates, under varying CO2 curing conditions. CO2 curing was conducted under a 99% concentration CO2 at a pressure of 10 bar. The curing temperatures were adjusted to 20℃ [68°F], 60℃ [140°F], and 90℃ [194°F], and compressive strength and carbonation depth were measured according to the slag substitution rate. Cement mortar with slag shows higher in both compressive strength and carbonation depth.
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