THE USE OF BITUMINOUS MATERIALS IN THE CONSTRUCTION OF RAIL BEDS

IMPIEGO DI MATERIALI BITUMINOSI NELLA SOVRASTRUTTURA DI LINEE FERROVIARIE

This article reviews some of the problems (water penetration, shifting and breaking of ballast etc.) concerning the maintenance of railway lines, and points out the advantages (better construction and operational characteristics, less maintenance etc.) deriving from the use of bituminous materials in the rail bed. The first important application of this technique in Italy was the construction of a 12 cm-thick sub-ballast layer of close texture bituminous mixture on the first section of the Rome Florence express line in 1975. The optimum design of the new type of rail bed is discussed and the results of laboratory tests (CBR, modulus of elasticity, tensile strength permeability and Marshall stability) carried out on the materials, are shown in tables and graphs. /TRRL/

• Corporate Authors:

  Casa Editrice la fiaccola

  Via Carlo Ravizza 62
  Milano,   Italy 
• Authors:
  • Zocca, A
  • Puorger, A C
  • Castagnetta, V
• Publication Date: 1977-1

Language

• Italian

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 57-76
• Serial:
  • Rivista della Strada
  • Volume: 46
  • Issue Number: 426
  • Publisher: Casa Editrice la fiaccola

Subject/Index Terms

• TRT Terms: Asphalt ballast; Ballast (Railroads); Bitumen; Bituminous materials; Bituminous mixtures; California bearing ratio; Construction; Laboratories; Modulus of elasticity; Permeability; Railroad tracks; Railroads; Stiffness; Strength of materials; Subballast; Subgrade (Pavements); Tests; Thickness; Train track dynamics
• Geographic Terms: Italy
• Old TRIS Terms: Ballast stiffness; Railway; Track response investigations; Track structures
• ITRD Terms: 4955: Bituminous materials; 4967: Bituminous mixture; 3087: California bearing ratio; 3655: Construction; 8051: Italy; 6237: Laboratory (not an organization); 5919: Modulus of elasticity; 5921: Permeability; 5544: Strength (mater); 5933: Thickness
• Subject Areas: Construction; Materials; Railroads; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00156891
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Aug 4 1977 12:00AM