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Test Methods and Specifications

Cover of Modified Surface Texture Depth (Pestle Method)
Modified Surface Texture Depth (Pestle Method)
  • Publication no: ATM-250-25
  • Published: 6 March 2025
  • Edition: 8.0

This test method describes the procedure for the determination of the surface texture depth of road surfaces, by the sand patch technique. This method is only applicable to surface texture depths greater than 0.3 mm and is the preferred method for determining surface texture allowances in the design of sprayed seals.

This test method can also be downloaded as a Word document.

In Edition 7.0, an incorrect version of Section 5 Calculation was included. This has been corrected in Edition 8.0. Edition 7.0 is not included in the archive.

  • 1. Scope
  • 2. References
  • 3. Apparatus
  • 4. Procedure
  • 5. Calculations
  • 6. Test Report
  • Appendix A: Texture Conversion Charts
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