ASPHALT SURFACINGS WITH MODIFIED TEXTURE

ASFALTDEKLAGEN MET GEMODIFICEERDE OPPERVLAKTEXTUUR

This report contains the results of the work carried out by the working Committee B9; Asphalt Surfacings with Modified Texture. Most of the research done by the working committee was concentrated on actual test sections of highways in the Netherlands. Three types of asphalt mixes were studied under traffic, namely hot rolled asphalt with precoated chippings (according to the English procedure), the so called open asphalt, normally used as a binder course and thirdly the most promising new development, porous asphalt having approximately 20% voids. The working committee came to the following conclusions and recommendations: (1) the dressing of fine dense asphalt with precoated chippings of 12-15 mm can produce good results only with very careful workmanship under favourable conditions. (2) porous asphalt (high pervious open-textured asphalt) can be used for reducing the thickness of the film of water on the road surface and for achieving good skidding resistance at high speeds. The low-speed skidding resistance of this material would have to be further improved. (3) as a provisional measure, short-term improvement of the surface properties of bituminous mixes can be achieved by the use of open-textured asphalt. This was already common practice with the Rijkswaterstaat, because construction in stages was applied. (4) in course of time it may be possible to develop a mix composition that can be applied directly to the roadbase & can be characterized as "coarse asphalt". The open-textured asphalt with a composition conforming to the 1972 specifications for road-building materials can already perform such a function, though its service life is often less than that of dense coarse-graded asphalt (5 to 10 years). (5) more research into the applicability of plant mix seals under Netherlands conditions will have to be carried out. /TRRL/

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• Corporate Authors:

  Stitching Studiecentrum Wegenbouw

  Jansbuitensingel 14 A
  Arnhem,   Netherlands 
• Publication Date: 0

Language

• Dutch

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 111 p.
• Serial:
  • Mededelingen Studiecentrum Wegenbouw SCW
  • Issue Number: 42
  • Publisher: Stitching Studiecentrum Wegenbouw
  • ISSN: 0376-6985

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Bituminous materials; Bituminous mixtures; Chippings; Coarse aggregates; Coarse grained materials; Construction management; Drainage; Durability; Experimental roads; Hot coated materials; Hot rolling; Mixing plants; Pavement base course; Pavement design; Pavement performance; Pavement wearing course; Porosity; Porous materials; Precoated aggregates; Properties of materials; Rolled asphalt; Seal coats; Skid resistance; Specifications; Surface treating; Surfacing; Texture
• Uncontrolled Terms: Modifications; Stage construction
• Geographic Terms: Netherlands
• Old TRIS Terms: Bituminous surfacing; Chips
• ITRD Terms: 2990: Basecourse; 4967: Bituminous mixture; 4585: Chippings; 9004: Coarse (mater); 2937: Drainage; 5910: Durability; 2778: Experimental road; 4997: Hot coated material; 3648: Mixing plant; 9048: Modification; 8078: Netherlands; 3055: Pavement design; 5938: Porosity; 5925: Properties; 2973: Sealing coat (on top of the surfacing); 3031: Skid resistance; 177: Specifications; 3657: Stage construction; 3053: Surface texture; 2972: Surfacing; 2980: Wearing course
• Subject Areas: Construction; Design; Highways; Hydraulics and Hydrology; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00174056
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Jun 28 1978 12:00AM