M25 FEATURE: NINE-MACHINE CONCRETE PAVING TRAIN

The use of the sgme concrete paving train on the Chertsey-Wisley section of the M25 motorway is described. Because of the anticipated heavy traffic, the design has been upgraded to 300 mm of reinforced pavement quality concrete, on a 225 mm lean-concrete sub-base. Paving was carried out in two layers and two passes of 7.2 M width. The train consists of a 4.5 cu M spreader for the bottom layer, a compactor, dowel bar inserter, compactors engineering tie bar inserter, a spreader for the top layer, an articulated compactor and initial finisher of the top layer, a transverse joint cutter to cut and insert a plastic biformer in grooves to form joints, a diagonal finisher and a brushing and curing machine providing a brushed finish and aluminised compound spray. Dowel bars were mechanically inserted at the construction joints into the bottom layer of concrete, covered by the top layer and then vibrated. They were then exposed and alignment checks showed that the early concrete mixes were not stable enough to retain them in position. However a change in aggregate produced satisfactory results. The programmed rate of 340 linear M per day was exceeded on many occasions with a maximum of 700 linear M in one day. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00105317
• Corporate Authors:

  Plenum Publishing Corporation

  233 Spring Street
  New York, NY  United States  10013
• Authors:
  • Welton, M W
• Publication Date: 1984-2

Media Info

• Features: Photos;
• Pagination: p. 17-18
• Serial:
  • CONCRETE
  • Volume: 18
  • Issue Number: 2
  • Publisher: THE CONCRETE SOCIETY
  • ISSN: 0010-5317

Subject/Index Terms

• TRT Terms: Aggregates; Concrete; Concrete pavements; Dowels; Freeways; Joints; Lean concrete; Metal bars; Mix design; Pavement subbase; Pavers; Paving; Reinforced concrete; Road construction; Slip form pavers; Vibration
• Uncontrolled Terms: Subbase
• Geographic Terms: United Kingdom
• Old TRIS Terms: Joint
• ITRD Terms: 4577: Aggregate; 3461: Bar; 4755: Concrete; 3896: Dowel; 2998: Joint (structural); 4761: Lean concrete; 4714: Mix design; 2752: Motorway; 4794: Reinforced concrete; 3665: Road construction; 2961: Roadbase; 3660: Slip form paver; 8119: United Kingdom; 5558: Vibration
• Subject Areas: Construction; Geotechnology; Highways; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 00387500
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Aug 30 1984 12:00AM