NEN EN 14579 : 2004

Foreword
1 Scope
2 Principle
3 Symbols and abbreviations
4 Apparatus
  4.1 General
  4.2 Performance requirements
  4.3 Transducers
  4.4 Apparatus for the determination of the arrival time of
      the pulse
  4.5 Other apparatus
5 Preparation of the specimens
  5.1 Sampling
  5.2 Test specimens
      5.2.1 General
      5.2.2 Dimensions
      5.2.3 The test specimens shall be prisms of 300 mm x 75
            mm x 50 mm with a tolerance of +/- 2 mm. Planes of
            anisotropy
      5.2.4 Drying the specimens
6 Test procedure
  6.1 General
  6.2 Determination of Pulse Velocity
      6.2.1 Factors influencing pulse velocity measurements
      6.2.2 Transducer arrangement
      6.2.3 Path length measurement
      6.2.4 Coupling the transducer onto the stone
      6.2.5 Measurement of the transit time
7 Expression of the results
8 Test report
Annex A (normative) Determination of pulse velocity in the case
                      of indirect transmission
Annex B (informative) Factors influencing the measurement of the
                      velocity of sound
  B.1 General Points
  B.2 Water Content
  B.3 Path Length
  B.4 Shape and sizes of the test specimens
  B.5 Fissures and voids
Bibliography

Describes a method for the determination of the velocity of propagation of pulses of ultrasonic longitudinal waves in natural stone, both in laboratory and in situ.