Controls 58-E4800 - Estimation of dynamic elastic modulus

Manuale di Istruzioni
Instruction Manual
58-E4800 Rev. 4 EN 21/05/2012
25
Static and
Dynamic elastic
module
estimation from ultrasonic pulse
3.3.7 Estimation of dynamic elastic modulus
From measurement of ultrasonic waves velocity it is possible to calculate the elastic
dynamic modulus ED as follows:
Where:
V = velocity in km/s
Q = concrete density in kg/m3
n = Poisson’s ratio (for high strength concrete
n = 0,15; for low strength concrete n = 0,30)
ED = Dynamic elastic modulus MN/m2
From the diagram in next figure it is possible to evaluate the elastic module. For elastic
module estimation it is enough to know the ultrasonic pulse velocity in km/s and enter in
the diagram moving vertically from the velocity axis.
The related Static and Dynamic elastic module can be read on the vertical axis at the
cross with "Static" and "Dynamic"curves.
Fig. 3-11