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Title |
Recent Trends in the Understanding of Strength Development Mechanisms in Portland Limestone Cement
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Authors |
노병철(Byeong-Cheol Lho) ; 박종현(Jong-Hyeon Park) |
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DOI |
https://doi.org/10.11112/jksmi.2025.29.6.80 |
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Keywords |
포틀랜드 석회석 시멘트(PLC); 강도 발현; 수화 반응 메커니즘; 혼화재(SCM); 성능 기반 최적화; 저탄소 콘크리트 Portland Limestone Cement (PLC); Strength Development; Hydration Mechanism; Supplementary Cementitious Materials (SCMs); Performance-Based Optimization; Low-Carbon Concrete |
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Abstract |
This study investigates the strength development mechanism of Portland Limestone Cement (PLC) as a sustainable alternative to Ordinary Portland Cement (OPC). PLC replaces a portion of the clinker with finely ground limestone, reducing CO₂ emissions while maintaining comparable mechanical performance. Experimental and analytical findings show that the compressive strength of PLC is governed by the combined effects of physical and chemical mechanisms, including the filler effect, nucleation effect, and carboaluminate formation. The optimal limestone replacement ratio of 10? 15% and increased fineness effectively offset the dilution of clinker, while the incorporation of supplementary cementitious materials (SCMs) such as fly ash and slag further improves long-term strength and durability through synergistic reactions. Performance-based mix optimization considering limestone fineness, clinker composition, water-to-binder ratio, and curing conditions is essential to achieve equivalent or superior performance to OPC.
The results provide a scientific framework for designing low-carbon, high-performance concrete and support the implementation of Korea’s 2050 Carbon Neutrality Roadmap by providing a scientific framework for mix design and standardization in the construction materials sector.
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