슬래그 기반 산업부산물을 활용한 고강도 시멘트 클링커 제조
Production of High-Strength Cement Clinker Using Slag-Based Industrial By-Products
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초록
본 연구는 다양한 산업부산물을 활용하여 고강도 클링커를 제조하기 위해 원료 배합 설계 및 이에 따른 클링커 주요 광물상(C3S, C2S, C3A, C4AF)의 형성 특성을 분석하였다. 실험을 통해 원료 대체율 및 Modulus 조건(LSF, SM, IM)이 클링커의 주요 광물상의 형성과 물리적 특성에 미치는 영향을 확인하였다. 소성온도 1,500 ℃, LSF 100, SM 2.7, IM 1.5의 Modulus 조건에서 제조된 A-1 클링커는 C3S 생성량이 75.0 %으로 확인되었으며, 로드밀 분쇄를 통해 4,000 cm2/g의 분말도(Fineness)를 확보하였다. A-1 클링커를 이용해 제작한 모르타르 공시체의 3일, 7일, 28일 압축강도는 각각 37.1 MPa, 45.6 MPa, 60.5 MPa를 확인하였다. 또한, 기존 연구와의 비교를 통해 산업부산물 활용이 클링커의 C3S 함량 및 물리적 특성에 미치는 영향을 분석하였다. 특히, 본 연구에서 활용한 KR 슬래그 기반 A-1 클링커는 기존문헌에서 보고된 C3S 함량(65∼70 %)을 상회하였으며, 고강도 시멘트로의 적용 가능성을 확인하였다.
Abstract
This study analyzed the formation characteristics of major clinker phases (C3S, C2S, C3A, C4AF) by varying the raw material mixing design to manufacture high-strength clinker using various industrial by-products. The effects of raw material substitution content and modulus conditions (LSF, SM, IM) on the formation and physical properties of the major clinker phases were confirmed through experiments. The A-1 clinker, manufactured under the modulus conditions of LSF 100, SM 2.7, IM 1.5, and a calcination temperature of 1,500°C, was confirmed to have a C3S production of 75.0%. A fineness of 4,000 cm2/g was achieved through rod milling. The compressive strengths of the A-1 clinker were 37.1 MPa, 45.6 MPa, and 60.5 MPa at 3, 7, and 28 days, respectively. A comparative analysis with previous studies examined the impact of industrial by-products on C3S content and clinker properties. The A-1 clinker utilizing KR slag achieved a C3S content exceeding the typical range reported in the literature (65~70%). This result confirms the potential of A-1 clinker for high-performance cement applications.
참고문헌 (14)
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