BS 598-105:2000

Committees responsible
      Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Determination of texture depth by laser texture meter
5 Measurement of texture depth by the sand-patch method
Annex A (normative) Manufacturer's calibration procedure for
                    laser texture meters
Annex B (normative) Application of the sand-patch method
Figure A.1 - Principle of laser displacement transducer
Figure A.2 - Outline dimensions of laser texture meter
Table 1 - Grading of sand for sand-patch test
Table 2 - Precision values texture depth by sand-patch method

Covers procedures for measurement of the texture depth of surfaces of bituminous materials for roads and other paved areas. Gives two procedures - one which uses a non-contact laser beam sensor system, and the other a fixed volume of sand spread on the road surface, known as the sand-patch method. The first procedure provides numerically different results to the second, and the two procedures should not be confused. Where the sand-patch method may be used on any surface type, the laser texture meter procedure is used only on newly laid chipped rolled asphalt wearing courses.