Ultrasonic tests of cement floors along their thickness with the use of exponential heads

Speaker:
Sadowski, Łukasz; Wrocław University of Science and Technology; Poland

Authors:
Hola, J.; Wrocław University of Science and Technology; Poland
Sadowski, L.; Wrocław University of Science and Technology; Poland
Hola, A.; Wrocław University of Science and Technology; Poland

ID: ECNDT-0456-2018
Download: PDF
Session: Civil Infrastructure-Conrete 3
Room: J1
Date: 2018-06-13
Time: 13:50 - 14:10

The paper presents ultrasonic tests of cement floors that were carried out in order to show how big the heterogeneity of the compressive strength distribution along their thickness can be. The tested specimens were taken from floors that had a significantly large surface area, were made of good quality mortar produced on an industrial scale and were of various thicknesses. Special exponential heads with point contact with the specimen’s surface were used for the tests. The correlative dependency between the velocity of the longitudinal ultrasonic wave and the compressive strength of mortars embedded in the tested floors was established. It was shown that the heterogeneity of the distribution of this strength along the thickness of the floors is significantly large. In the top zone, which is subjected to direct operational impacts, the compressive strength is definitely lower than that in the bottom and middle zones. The paper points out that this problem should not be underestimated with regards to floor durability. Suggestions for possible remedial actions were also provided.