DIN EN 12504-4 E : 2004

Foreword
  1 Scope
  2 Normative references
  3 Terms and definitions
  4 Method
  5 Apparatus
    5.1 General
    5.2 Performance requirements
    5.3 Transducers
    5.4 Apparatus for determination of arrival time of the pulse
  6 Procedures
    6.1 Determination of Pulse Velocity
  7 Expression of result
  8 Test report
  9 Precision
Annex A (informative) Determination of pulse velocity
                      - indirect transmission
Annex B (informative) Factors influencing pulse velocity
                      measurements
  B.1 General
  B.2 Moisture content
  B.3 Temperature of the concrete
  B.4 Path length
  B.5 Shape and size of specimen
  B.6 Effect of reinforcing bars
  B.7 Cracks and voids
Annex C (informative) Correlation of pulse velocity and
                      strength
  C.1 General
  C.2 Correlation using moulded specimens
  C.3 Correlation by tests on cores
  C.4 Correlation with the strength of precast units
Bibliography

Specifies a method for the determination of the velocity of propagation of pulses of ultrasonic longitudinal waves in hardened concrete, which is used for a number of applications.