USE OF HEATER - SCARIFIER IN PAVEMENT MAINTENANCE
Two situations are described where the increased cost of asphalt cement has been offset with the use of a heater scarifier. Details are outlined of a program of resurfacing a Parkway with an overlay of HLA4 which has resulted in a pavement surface exhibiting excellent performance and service. The scarifiers were a variation of heater planers. Tines or teeth of the scarifier scarify the heated surface and tumble the mix. A screed behind the tines redistributes the mix to a level grade as does the screed on a asphalt spreader. The details are also described of resurfacing a severly distressed pavement surface in a second project. Scarifications completely eliminated the surface cracks and fractures in the top 3/4 to 1 inch layer that is heated and tumbled. Cracks below this layer are partially eliminated as the hot mixture is crowded forward and down by the scarifier teeth. It has been found that heating and scarifying does not decrease the penetration of the asphalt cement or cause any significant loss in the flexibility and durability of the pavement. The employment of a scarifier to correct skid resistance problems at two locations is also described.
- Presented at the International Asphalt Paving Conference held in Bermuda, January 1975.
Toronto Roads and Traffic Department, CanadaToronto, ONo, Canada
- Johnston, T H
- Publication Date: 1975-1
- Features: Tables;
- Pagination: 6 p.
- TRT Terms: Asphalt cement; Cracking; Fracture mechanics; Heaters; Level of service; Pavement maintenance; Pavement performance; Resurfacing; Roadbuilding machinery; Skid resistance
- Uncontrolled Terms: Fracture; Service
- Old TRIS Terms: Scarifiers
- Subject Areas: Highways; Maintenance and Preservation;
- Accession Number: 00097752
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 30 1975 12:00AM