Procedure
Reinforced fiber concrete, thanks to the contained fibers, has the characteristic of significantly limiting the formation of cracks after structural failure, thus avoiding the falling and dispersion of parts.
The properties of reinforced fiber concrete are regulated by the UNI EN 14651 standard, and the test sample is represented by a beam of appropriate dimensions with a notch.
The test consists of applying a bending load at three points with a test progression determined by the crack opening rate, detected by a specific extensometer (CMOD).
The fundamental difference from fiber-unreinforced concrete is highlighted by the residual load that can be detected after the appearance of cracking and the related collapse, a value that is clearly linked to the type and dosage of the sample packaging.
The test diagram highlights the behavior of the fiber. The difficulty in conducting the test lies in the machine’s ability to provide feedback on the load application through the feedback given by the clip-gauge that measures the crack mouth opening.
Our UTM-E machines represent an optimal solution for carrying out this type of test.
IN EVIDENZA:
