THE SILENT ASPHALT ON THE INN MOTORWAY

L'ASFALTO SILENZIOSO NELL'AUTOSTRADA DELL'INN

Unlike the drainage asphalts generally adopted to date in Europe, the silent asphalt is not laid directly on to a bituminous or concrete carriageway surface, but is underlaid by an isolating layer which compensates tensile stresses. This interposed layer of high elastomer bitumen is sprayed on at a rate of 2.3 to 3.2 litres per square metre, adding precoated stone chippings (size 5/8 or 8/12) which are compacted into the binder with a rubber tyred roller. Onto this intermediate layer is then spread the high void content drainage layer (also of high elastomer bitumen). This article describes the application of the surfacing on a test section of the INN valley motorway at Angath. The advantages demonstrated by the test section are: an absorbtion capacity and permanent equivalent sound level reduction of 5 dbA; and a maximum tyre noise reduction of 15 dbA. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03732916
• Corporate Authors:

  Casa Editrice la fiaccola

  Via Carlo Ravizza 62
  Milano,   Italy 
• Authors:
  • D'Eramo, L
• Publication Date: 1990-6

Language

• Italian

Media Info

• Pagination: p. 611-613
• Serial:
  • Strade
  • Volume: 92
  • Issue Number: 1267
  • Publisher: Casa Editrice la fiaccola
  • ISSN: 0373-2916

Subject/Index Terms

• TRT Terms: Asphalt; Surfacing; Tires; Traffic noise
• Subject Areas: Highways; Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 00609678
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jun 30 1991 12:00AM