Title:
Comparative Study of Graphene Oxides from Wyoming Powder River Basin Coal and Commercial Source on Concrete
Author(s):
Iftekhar Dipta
Publication:
Web Session
Volume:
ws_F24_AlamDipta.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
11/3/2024
Abstract:
Previous studies have established that graphene oxide (GO) and reduced graphene oxide (rGO) from various sources can improve concrete performance. No research has explored coal-based GO or rGO in concrete, making this study unique and valuable for carbon sequestration. This research examines GO and rGO derived from Wyoming Powder River Basin (PRB) coal and compares them with commercially available GO to assess improvements in concrete compressive strength. PRB coal is pyrolyzed at 850°C and treated with nitric acid to produce GO, which is further heated to 200°C and 1100°C to obtain rGO. The size and shape of these GO and rGO are smaller, with a larger surface area than the commercial ones. The study finds that substituting cement with 0.05% GO by weight results in a 27.6% increase in 56-day compressive strength, compared to an 8% increase with commercial GO. This demonstrates the potential of PRB coal-derived GO as an effective concrete additive.