아스팔트 콘크리트 포장용 골재의 품질향상에 관한 연구(II) : (Mehodology for Controlling Aggregate Quality for Asphalt Concrete Pavements(II))

다국어 초록 (Multilingual Abstract)

This study was carried out to study methodologies of improving quality of aggregates for asphalt concrete pavement in highway. Coarse aggregate is a very important material that greatly controls performance of pavement by affecting stiffness, rutting and strength of highway asphalt concrete which requires high quality materials. Recent years, aggregate shortage made the consumer of the aggregate have no choice but securing demanded quantity without considering quality of aggregates. Therefore, in some sources (quarries), too much poor shape, flat or elongated particles, are included in their aggregate products. However, no specification was avallable to use for controlling this aggregate shape problem. Many specifications in Korea clearly enumerates the quality limits about specific gravity, gradation, abrasion ratio, soundness and etc., and these specifications are well aware in construction industry. But, the specification for the shape of aggregate is not the case. Therefore, to suggest appropriate solution for this problem, review and analysis of data and literatures from U. S. A., U. K., Japan and Korea were performed. A quality control method in plant was suggested, the relationship between crusher type and aggregate shape was evaluated, and quality limits in various specification were compared in this study. A special sieve analysis was developed and suggested as a testing method for Special Sieve Analysis for Separating Poor Shape Coarse Aggregate, which is not available in any current specifications. To show problems induced by using poor shape aggregates to the aggregate producers and user, many tests were conducted on three shapes of aggregates, poor, normal and excellent. In comparison of the test results for the three shapes, the poor shape aggregate showed the highest abrasion ratio, and lowest percentage of solid. Also in mixture comparison, the mixture with poor aggregate shape had worst Marshall properties, lowest indirect tensile strength, and required the highest asphalt content in mix design. Moreover, the photograph which was taken from the saw-cut face of the Marshall specimens revealed that the flat or elongated particles were oriented horizontally within compacted mixture. Therefore, it was evidenced that excessive content of poor shape aggregates resulted in degradation of quality in asphalt paving mixture.

목차 (Table of Contents)

• 목차
• 표목차
• 그림목차
• 요약
• ABSTRACT
• 제1장 서론
• 1.1 연구 배경 및 필요성
• 1.2 연구 목적 및 내용
• 제2장 골재(Mineral Aggregate)
• 2.1 골재의 정의
• 2.2 골재 자원의 분류
• 2.3 골재의 적합성 평가
• 참고문헌
• 제3장 국내 골재 산업 현황 및 플랜트 품질 관리 방안
• 3.1 골재 수급에 대한 법령 체계
• 3.2 골재 산지의 분포 및 득성
• 3.3 골재의 수요 및 공급
• 3.4 국내 골재 유통과정상의 적절한 시스템 제시
• 3.5 아스팔트 플랜트에서의 골재 품질 관리 방안
• 참고문헌
• 제4장 골재와 파쇄 장비
• 4.1 골재의 암석학적 특성
• 4.2 골재의 제조 장비와 골재 입형
• 4.3 아스팔트 포장용 골재에 적합한 암석과 제조 장비
• 4.4 결론
• 참고문헌
• 제5장 아스팔트 포장용 골재의 품질 기준
• 5.1 서론
• 5.2 보조기층
• 5.3 기층
• 5.4 아스팔트 콘크리트 표층
• 5.5 일본 JIS 골재입도 규정
• 5.6 분석 및 고찰
• 5.7 결론
• 참고문헌
• 제6장 아스팔트 포장용 골재의 입형 선별 기법 연구
• 6.1 서론
• 6.2 재료 및 방법
• 6.3 결과 및 고찰
• 6.4 입형 판정 시험 방법 제시
• 제7장 골재의 입형과 아스팔트 혼합물의 특성
• 7.1 서론
• 7.2 재료 및 방법
• 7.3 결과 및 고찰
• 7.4 결론
• 참고문헌
• 제8장 부순 모래의 품질 특성
• 8.1 서론
• 8.2 부순 모래의 품질
• 8.3 재료 및 방법
• 8.4 결과 및 고찰
• 8.5 결론
• 참고문헌
• 제9장 종합 결과 요약 및 결론
• 9.1 요약 및 결론
• 9.2 향후 연구 과제
• 참고문헌
• 부록
• 부록 A: 입형 판정 기준(안)