Browse > Article

Improvement of Dry-blasting Efficiency for Ballast used as Aggregate of Paved Track  

Lee, Il-Wha (한국철도기술연구원, 철도구조연구실)
Publication Information
Journal of the Korean Society for Railway / v.13, no.1, 2010 , pp. 78-83 More about this Journal
Abstract
On the paved track, the ballast is used as aggregate for the filling layer using the pre-packed concrete technique. The most important condition of aggregate is adhesive strength with mortar. To satisfy this condition, surface of aggregate should be cleaned by water or others. In a paved-track method to be introduced domestically, an environment-friendly dry-washing technology which will replace the water-washing method has been developed. A dry-washing method was designed to blast the crushed weight material with a diameter of 0.3~0.5mm at high pressure to peel the surface of the aggregate. The study was intended to enhance the washing efficiency of dry-blasting technology and to that end, the tests including blasting material, content of fine aggregate depending on time elapsed, content of chloride, LA abrasion rate and compressive strength were conducted to recommend the efficient washing material and the process.
Keywords
paved track; ballast; blasting; aggregate; recycling;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 W. H. Taylor (1977), "Concrete technology and practice," 4th., McGraw-Hill.
2 신현묵 (1975), "주입모르타르의 배합비가 프리팩트콘크리트의 압축강도에 미치는 영향에 관한 연구," 대한토목학회지, 제23권, 3호, pp. 77-89.
3 한국콘크리트학회 (2000), "콘크리트 설계기준."
4 F. K. Kong, R. M. Evans, E. Cohen, and F. Roll (1983), "Handbook of structural concrete," Pitman.
5 한국철도기술연구원 (2006), "기존선 자갈궤도 생력화를 위한 포장궤도 개발(IV)."
6 L. D. Mantuani (1983), "Handbook of concrete aggregate," Noyes Pub.
7 R. E. Davis (1960), "Prepacked method of concrete repair," Journal of ACI, pp. 155-172.
8 A. D. R. Brown, D. Johnson, and A. McLeod (1990), "Special cements and their applications," Pub. E&FN Spon., pp. 335-349.
9 이일화 (2009), "도상자갈 재활용을 고려한 포장궤도용 골재 기준," 한국철도학회 논문집, 제12권, 제 4호, pp.481-487.