The problem of reducing the possible depths of water layers on road surfaces, especially in areas where the roadway is formed as a transition curve with only a small resulting fall is considered, and laboratory experiments on the influence on permeability due to the variation in the composition of open graded wearing course materials is described. The results suggest that the measurable permeability of open graded drainage surfacing as they have been made experimentally in Denmark, is reduced considerably in a short time. However, it is a friction course with extremely good drainage on the top in connected surface channels, thus providing the best conditions for reasonable friction even with heavier rainfall. Observations are made relating to the appearance of the pavement in wet conditions, and de-icing salt effects. Brief comments are made regarding the problem of binder migration, the effect of silting on the reduction of permeability, and on permeability and texture depths.
- Proceedings of International Symposium on Porous Asphalt, Amsterdam, Netherlands, May 31 to June 2, 1976.
Study Centre for Road Construction, Netherlands14a Jansbuitensingel
- NYSTRUP, P
- Publication Date: 1977
- Features: Figures;
- Pagination: p. 161-171
- TRT Terms: Binders; Deicing chemicals; Drainage; Friction; Open graded aggregates; Pavements; Permeability; Rainfall; Silts; Surface course (Pavements); Texture; Wearing course (Pavements); Wet weather
- Uncontrolled Terms: Wet pavements
- Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; Materials; Pavements;
- Accession Number: 00163672
- Record Type: Publication
- Report/Paper Numbers: S.C.W. Record 2 Proceeding
- Files: TRIS
- Created Date: Mar 14 1978 12:00AM