PRACTICAL EXPERIENCES CONCERNING THE COMPACTION OF DENSE SURFACE LAYERS IN THE NETHERLANDS --BITUMEN, FLEXIBLE AND DURABLE. 3RD EUROBITUME SYMPOSIUM 1985, THE HAGUE, NETHERLANDS, SEPTEMBER 11-13, 1985

Dense mixes of asphalt surface layers are hard to compact. In the Dutch situation the compaction process of such mixes has been analysed through an investigation in practice. The compaction process passes off in three stages: (1) the "kneading" stage; (2) the "elastic" stage; (3) the "squeezing" stage. The possible roller to be used is discussed per stage. Apart from compaction as the permanent deformation desired, the "rolling out", as undesired deformation, is gone into as well. In particular in the "elastic" stage strong temporary deformations occur. These undesirable deformations can also bring undesirable side-effects. The basic action of these side-effects is dealt with through clear figures and advice is given to prevent unnecessary trouble. The modulus of elasticity of asphalt shows a minimum when the asphalt compacted is about 100 deg c. This is caused by the compressibility of the air trapped. The latter gives still a possibility of a compaction of 1 to 2% if the temperature of the asphalt lies between 90 and 50 deg c. The course of the degree of compaction in time is not even, but shows three main jumps. It is still necessary here to roll continuously, whereby not every roller passage gives extra compaction. A roller pass can even decrease the degree of compaction. The principal conclusion is that a good preparation of the asphalt layers before rolling, whereby the main points are mentioned, is already half the work. Another very important conclusion is that the prople carrying out this work must have patience. The roller capacity must be sufficient and the drivers must know the effects of their machines.(a) for the covering abstract of the symposium see IRRD 815173.

• Corporate Authors:

  EUROBITUME

  BD EMILE BOCKSTAEL 351
  Bruxelles, ZZ Belgique   
• Authors:
  • Linden, AHG
  • Van STEK, P J
• Publication Date: 1985

Language

• Undetermined

Media Info

• Pagination: p. 278-83
• Serial:
  • Publication of: EUROBITUME
  • Publisher: EUROBITUME

Subject/Index Terms

• TRT Terms: Bituminous mixtures; Compaction; Conferences; Deformation; Density; Elasticity (Mechanics); Pavement layers; Rollers; Temperature; Wearing course (Pavements)
• Geographic Terms: Netherlands
• Subject Areas: Construction; Data and Information Technology; Highways; Pavements;

Filing Info

• Accession Number: 00482104
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Apr 30 1989 12:00AM