Abstract
The fib Model Code chose the EN14651 test as the basic method for evaluating the structural behaviour of fibre-reinforced concrete (FRC). However, there are technological restrictions that must be considered. For example, this test has a relatively complex execution, and it is difficult to carry it out under samples extracted from real structures. In this study, an experimental campaign is developed to validate a new test, called Montevideo (MVD) test, for FRC. The test is based on the wedge-splitting test, but simplifications in terms of sample preparation and loading device allow it to be used in routine quality control. The results show a) a stable friction coefficient between the wedge and sample; b) a linear relationship between wedge displacement and crack mouth opening displacement (CMOD), which allows conducting the test through the stroke displacement only; c) a coefficient of variation below the usual range of the EN14651 test; and d) a load correlation factor (kMVD = 2.5) to transform the loads from the MVD test to EN14651 test for large values of CMODs (above 2 mm). This test can be performed on samples prepared from extracted cores with an open displacement control system in specimens with softening behaviour, and without producing post-peak instabilities. The development of the MVD test provides a practical and simple method for controlling the FRC quality, complementary to the EN14651 test.
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