FRICTION CHARACTERISTICS OF PAVING MATERIALS IN CONNECTICUT, REPORT 2
Seasonal variation in friction was again observed as in previous years on heavily traveled blacktop roads but has not been seen on Portland Cement Concrete. It corresponds to the development of a dark and greasy appearance on the surface in mid-to-late summer and is most pronounced where truck traffic is heavy. Comparisons of burlap-drag and transverse-broomed textures on PCC indicate that skid numbers on transverse brooming trend to remain outside of the wheel paths. An analysis of cores removed from several of the test sites was attempted; cleaning of the surface was done, and skid numbers obtained by means of the British Pendulum Tester. The experiments were unsuccessful. A section of pavement placed with an open-graded friction course was included in the 1973 test schedule and was found to maintain a constant and fairly high number throughout the summer. No relationship between skid number and asphalt content over a range of 5 - 7 percent could be found on blacktop pavements. Tests made on pavements using a mixture of aggregate types suggest that reduced loss of friction may result from the use of this technique. /FHWA/
- Research sponsored by Connecticut Department of Transportation in cooperation with FHWA.
Wethersfield, CT United States 06109
- Publication Date: 1974-8
- Pagination: 68 p.
- TRT Terms: Aggregate mixtures; Asphalt pavements; Bituminous materials; Flexible pavements; Friction; Pavements; Portland cement concrete; Seasons; Skid resistance tests; Skidding; Surface course (Pavements); Surface treating; Texture
- Uncontrolled Terms: Seasonal variations; Skid number
- Old TRIS Terms: Bituminous surfacing
- Subject Areas: Geotechnology; Highways; Pavements;
- Accession Number: 00083582
- Record Type: Publication
- Source Agency: Federal Highway Administration
- Files: TRIS, USDOT, STATEDOT
- Created Date: Apr 8 1975 12:00AM