A Study on Strategies for Establishing Korean Portland Limestone Cement Standards Based on an Expert Survey

Key Points

• This research aims to analyze industry opinions on developing standards for Korean Portland limestone cement to reduce CO₂ emissions.
• Conducted a survey with 337 experts in the cement and concrete fields.
• Survey focused on quality parameters of limestone (CaCO₃ purity, clay content, TOC, fineness) and acceptable use levels.
• Gathered insights on strength grades and physical-chemical quality factors required for PLC.
• Over 70% of respondents expressed positive views on developing domestic PLC standards.
• Respondents showed favorable attitudes towards increasing limestone usage.
• Concerns remained high regarding potential decreases in strength and durability, highlighting the importance of quality stability.