ACCELERATED TRAFFICKING TESTS OF CONCRETE FLAG PAVING

This paper describes how the use of flag paving under traffic poses particular difficulties to pavement engineers. Flag pavements bedded on sand are limited in the numbers of vehicles that they can carry and the use of mortared flags has often been associated with early failure under traffic. This paper explores new ways of overcoming these shortcomings by using high technology mortars and adhesives to fix the flags on to a concrete base. These materials were evaluated by accelerated trafficking studies of four full-scale prototype flag pavements. These tests used the ARRB Accelerated Loading Facility (ALF). In the tests, flags, 400 x 400 mm in thicknesses of 40 and 53 mm were fixed in both stack and stretcher bonds on a rigid concrete base. Two types of fixing were examined. These comprised mortar and adhesives. Tests panels were orientated both normal and at 45. to the direction of trafficking. Trafficking was conducted using a dual wheel driven in one direction over the pavements. Dual heel loads from 40-kN to 80-kN were studied with up to 60,000 wheel passes per test panel. Overall, the tests showed that it is possible to achieve good levels of performance in flag pavements under traffic provided that care is taken to fix the flags securely to an adequate concrete slab base. The paper includes recommendations for design and construction.

Language

  • English

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Filing Info

  • Accession Number: 00964293
  • Record Type: Publication
  • ISBN: 087659229X
  • Files: TRIS, ATRI
  • Created Date: Oct 3 2003 12:00AM