NEN EN 12697-40 : 2012

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
  5.1 Permeameter
  5.2 Standing board
  5.3 Stopwatch
  5.4 Thermometer
  5.5 Water
6 Procedure
  6.1 Calibration
  6.2 Locations
  6.3 Measurement at each location
7 Calculation
8 Report
9 Precision
Annex A (normative) Apparatus calibration
  A.1 Application
  A.2 Volume calibration
  A.3 Series resistance time, r
  A.4 Parallel leakage time
Bibliography

Explains a method to determine the in-situ relative hydraulic conductivity, at specific locations, of a road surfacing that is designed to be permeable.