Ultrasound on concrete
The working principle of ultrasound testing in concrete, better known as ultrasound for concrete, is to measure the propagation time of an ultrasonic wave along a piece of concrete.
The propagation time depends on the density and modulus of elasticity of the concrete, and can change depending on the densification conditions during the work, the concrete mix, curing conditions and/or anomalies along the concrete piece.
With this in mind, ultrasound in concrete can be applied to
- Determining the homogeneity of concrete in structures;
- Define areas where more detailed research is recommended;
- Monitor the evolution of concrete properties over the structure's service life;
- Determine the modulus of elasticity of concrete in service.
In the event of discontinuity in the part, ultrasound can be useful for defining the occurrence and investigating the depth of propagation of cracks or voids.
Another very useful application is the use of ultrasound to estimate the compressive strength of concrete, a procedure that can be complemented by sclerometry testing and the extraction of cores. This approach is particularly interesting for the commissioning and investigation of large and/or highly responsible structures, such as:
Bridges, viaducts and other Special Works of Art such as:
- Tunnels, railroads and highways;
- Buildings to support equipment (crushers, silos, mills, etc.) and other processes.
This test is standardized by Brazilian and international standards. Even so, it is essential to understand the structural behavior and interpretation of the data obtained for a more assertive analysis.
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