The general composition of porous asphalt is given and the details are described of 4 experimental test sections together with some variations in applications. The porous asphalt mix consisted of 85% (by weight) of crushed stone (5-15 mm), 10.5% crusher sand (0-13 mm), 4.5% filler, and 4.2% bitumen. The results of examination of core sections, skid resistance and the types of stone employed are tabulated. Observations at these test sections indicate that rutting due to after-compaction by traffic has not occurred. The sections have not become clogged with oil or dirt. In one section however, the voids of the shoulder were contaminated and were cleaned by high pressure water jetting. Snow was found to force into the voids, however, deicing with salts presented no problems. The carriageway markings applied to the porous asphalt consist of ordinary marking paint except in one place where a thermoplastic compound was used. The texture depth was measured on all test sections by the sand-patch method; values of about 2 mm were obtained.

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 184-192

Subject/Index Terms

Filing Info

  • Accession Number: 00163675
  • Record Type: Publication
  • Report/Paper Numbers: S.C.W. Record 2 Proceeding
  • Files: TRIS
  • Created Date: Mar 14 1978 12:00AM