Because of the easy applying and not costing too
much, ultrasonic pulse velocity (UPV) is one of the most used nondestructive techniques to determine concrete characteristics along
with impact-echo, Schmidt rebound hammer (SRH) and pulse-echo.
This article investigates the relationship between UPV and
compressive strength of hybrid fiber reinforced concretes.
Water/cement ratio (w/c) was kept at 0.4 for all concrete mixes.
Compressive strength of concrete was targeted at 35 MPa. UPV
testing and compressive strength tests were carried out at the curing
age of 28 days. The UPV of concrete containing steel fibers has been
found to be higher than plain concrete for all the testing groups. It is
decided that there is not a certain relationship between fiber addition