Enhancing the Material Properties of Portland Limestone Cement Through the Co-utilization of Anionic Polymers Derived from Seaweed and Oyster Shell Waste
발표자
박재영 (인하대학교)
연구책임자
오동엽 (인하대학교)
초록
내용
Cement production, reliant on limestone for calcium oxide, emits significant carbon dioxide. Portland limestone cement (PLC), substituting calcium oxide with calcium carbonate, can be a CO2 reduction strategy, though it often shows inferior properties to Ordinary Portland Cement (OPC). This study explores waste oyster shells as a sustainable limestone alternative in PLC. To address property limitations, anionic polymers (carrageenan, alginic acid) extracted from seaweed were incorporated. PLC samples with these polymers exhibited a 10-20% increase in compressive strength. This enhancement is attributed to the polymers' gelation behavior, suppressed water evaporation, and reduced porosity within the cement matrix due to decreased C-S-H particle aspect ratio. This research demonstrates the potential of valorizing discarded oyster shells and selectively using anionic polymers for a more sustainable cement industry.