고로슬래그미분말 혼입 콘크리트의 배합설계를 위한 구조체 강도 보정값 산정에 관한 실험적 연구

초록

In recent years, the construction industry has increasingly adopted industrial by-products to reduce cement consumption and mitigate CO₂emissions, with a particular emphasis on the growing use of ground granulated blast-furnace slag (GGBFS). While GGBFS is effective inreducing the heat of hydration, higher replacement levels often delay early strength development and may hinder the attainment of designstrength. This study aims to analyze the strength development characteristics of structural concrete incorporating GGBFS and to establishcorrection factors through comparison with standard-cured specimens. To this end, replacement ratios of 0%, 20%, 40%, and 60% wereexamined, and structural members were cast under seasonal outdoor conditions (standard, summer, and winter). Core specimens were extractedto measure compressive strength, and companion standard-cured cylinder specimens were tested for comparison. Experimental results revealedthat 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 tocontribute to the establishment of correction factors and quality control standards for structural concrete incorporating GGBFS.

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