One of the research projects conducted by the Belgian Centre de Recherches Routieres on slipperiness was on deep transverse grooving of fresh cement concrete. Several test sections were constructed, and their behavior was followed for over 10 years. Deep transverse grooving consists of imprinting into the pavement surface 5- to 7-mm-deep grooves, 15 to 30 mm apart. The measurements that have been carried out have brought to light the substantial increase of the sideway force coefficient (SFC) of a grooved pavement as compared to that of a smooth one. These measurements have permitted the definition of quality factors of a grooved concrete pavement. For example, the SFC drop between 20 and 80 km/h is correlated linearly to the inverse of the surface mean leveling depth, and the SFC value for a low speed depends, for practical purposes, on only the polish condition of the surface aggregate. Practical criteria have been based on this: (a) No polish-susceptible stony or sandy element may appear at the pavement surface; and (b) the average leveling depth of the grooved surface must reach at least 2 mm. Grooving may be achieved by combs or fork-like tools. A prototype machine for both grooving and spreading the curing compound has been developed and is now in use. Practical recommendations for users and machine manufacturers are offered. In addition to antiskid properties, grooved surfaces have several secondary advantages and drawbacks: (a) noticeable improvement of surface drainage, (b) reduction of dazzling glare due to the reflection of grazing light, (c) possible increased tire wear, and (d) an unpleasant whizzing noise, which could, however, be checked by a random spacing of grooves.

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 141-150
  • Monograph Title: Skid resistance
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00096440
  • Record Type: Publication
  • ISBN: 0309023688
  • Files: TRIS, TRB
  • Created Date: Jul 15 1975 12:00AM