SPECIFICATION: The surface texture of a pavement or runway is important for the safety aspect of the running surface. A good surface texture is necessary at high vehicle speeds to facilitate rapid drainage of water from the surface and to utilise the tyre tread rubber to absorb some of the kinetic energy of the vehicle.Texture depth determined by the Sand Patch Method is a measure of the surface macrostructure. The test utilises the same apparatus for concrete or bituminous road surfaces.
Apparatus
Supplied as a complete kit in a carrying case comprising the following:
- 50 ml capacity1 measuring cylinder,
- 1 hard rubber faced spreader disc
- Pouring Pycnometer
- 1 300 mm rule
- Soft Brush
- Supply of Sand
- 1 carrying case
Note: the sand is clean silica sand of rounded particle shape passing a 300 micron BS sieve and retained on a 150 micron BS sieve.
