| Title |
An Experimental Study on Determining Structural Strength Correction Factors for Concrete Mix Designs Incorporating Ground Granulated Blast Furnace Slag |
| Authors |
정민구(Jeong, Min-Gu) ; 이한승(Lee, Han-Seung) |
| DOI |
https://doi.org/10.5659/JAIK.2025.41.12.339 |
| Keywords |
GGBFS-modified Concrete; Structural Concrete Mix Design; Strength Correction Factor (mSn) |
| Abstract |
In recent years, the construction industry has increasingly adopted industrial by-products to reduce cement consumption and mitigate CO₂
emissions, with a particular emphasis on the growing use of ground granulated blast-furnace slag (GGBFS). While GGBFS is effective in
reducing the heat of hydration, higher replacement levels often delay early strength development and may hinder the attainment of design
strength. This study aims to analyze the strength development characteristics of structural concrete incorporating GGBFS and to establish
correction factors through comparison with standard-cured specimens. To this end, replacement ratios of 0%, 20%, 40%, and 60% were
examined, and structural members were cast under seasonal outdoor conditions (standard, summer, and winter). Core specimens were extracted
to measure compressive strength, and companion standard-cured cylinder specimens were tested for comparison. Experimental results revealed
that correction factors of approximately 6 MPa in summer and 8 MPa in winter were required, while in Autumn(standard)-season conditions,
a correction of 1 MPa was deemed necessary when considering safety margins. Accordingly, the findings of this study are expected to
contribute to the establishment of correction factors and quality control standards for structural concrete incorporating GGBFS. |