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- Title
Ultrasonic Assessment of Damage in Concrete under Compressive and Thermal Loading Using Longitudinal and Transverse Waves.
- Authors
Silva, F. A. N.; Nogueira, C. L.; Silva, J. A.; Araújo, A. V. P.; Azevedo, A. C.; Delgado, J. M. P. Q.
- Abstract
Concrete, when exposed to high temperatures, presents important changes in its properties of strength and deformation and, in extreme situations, these alterations can constitute risks to the integrity and the safety of the structures. This work presents extensive campaign with 70 cylindrical specimens and seven different mixture proportions: two of mortar and five of concrete, to analyze the propagation profile of longitudinal and transverse ultrasonic waves in concrete cylindrical specimens, associating the variation of the ultrasonic pulses with the level of compression stresses and the degree of damage imposed by high temperature. The compressive strength was within the range of 32 and 64 MPa and the specimens were exposed to temperatures of 250°, 300° and 350°C. The results indicate that longitudinal and transverse ultrasonic waves can be successfully applied in the evaluation of diffuse damage cause by uniaxial compression load and exposure to high temperatures.
- Subjects
SHEAR waves; LONGITUDINAL waves; COMPRESSION loads; EFFECT of temperature on concrete; ULTRASONIC propagation; ULTRASONIC waves; CONCRETE
- Publication
Russian Journal of Nondestructive Testing, 2019, Vol 55, Issue 11, p808
- ISSN
1061-8309
- Publication type
Article
- DOI
10.1134/S1061830919110081