Geological conditions in Japan result in about 700 km of the Japanese National Railways being rated as having "poor subgrade." To reduce maintenance on these segments, JNR has adopted a method of reinforcement consisting of a top layer of precisely sized slag and a bottom layer of sized crushed stone with asphalt emulsion spread over the subgrade to protect and cure the slag until it solidifies. Complete drainage of rainwater is provided during construction; subgrade materials are compacted to more than 95% of maximum dry density.

  • Availability:
  • Corporate Authors:

    Japan Railway Engineers' Association

    2-5-18 Otemachi, Chiyoda-ku
    Tokyo,   Japan 
  • Authors:
    • INO, T
  • Publication Date: 1977

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 22-23
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00170089
  • Record Type: Publication
  • Source Agency: Japanese Railway Engineering
  • Files: TRIS
  • Created Date: Feb 16 1978 12:00AM