  The fundamental application of the ultrasonic pulse velocity method (UPV) in
the study of concrete, consist in the analysis and estimation of the mechanical
properties (compressive strength). The precission of the estimation may be
dependent on the incidence of various factors, one of which is the water
content acquired by the sample of concrete. In [Etsuzo] a lineal dependence of
the UPV in terms of the water content for different dosifications of concrete
is proposed. This paper presents an analysis of that dependence proving that an
exponential model describes better the behavior of the velocity as function of
water content.
