EVALUATION OF ULTRATHIN HOT MIX ASPHALT RESURFACING (HOT LAID MICROSURFACING)

The purpose of this field evaluation was to monitor the installation procedures and field performance of an ultrathin, open graded, hot mixed asphalt friction course placed over a heavy application of polymer-modified asphalt emulsion, known by the trade name "NOVACHIP (Registered Trademark)". The material is laid using specially built equipment, which spreads both the asphalt emulsion and hot mix asphalt in a single pass. The material is placed at an average thickness of 3/8 in. to 3/4 in. (10 mm to 20 mm). Four projects were monitored at regular intervals over a five-year period. The evaluation included a visual performance for raveling, weathering, delamination, in addition to skid resistance testing, surface macrotexture depth testing, surface roughness (International Roughness Index), and transportation related noise measurements. NOVACHIP (Registered Trademark) provided excellent surface leveling and profiling over the existing surface. The existing surface irregularities and minor rutting were easily restored to a smooth surface both transversely and longitudinally. The average skid resistance on all three projects has remained well above acceptable levels. Overall performance results of NOVACHIP (Registered Trademark) were excellent. Based on this study, NOVACHIP (Registered Trademark) can be considered as an alternate maintenance option for preventive maintenance and surface rehabilitation, especially on roads which have high average daily traffic.

Language

  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 125 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00796929
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-PA-99-003+93-067,, Final Report
  • Contract Numbers: DTFH71-94-TBO-PA-31
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Aug 8 2000 12:00AM