Luis Segura-Castillo, Renata Monte, Isaac Galobardes, Antonio D. de Figueiredo
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Determination of tensile residual strength of fibre reinforced concrete by a robust and simple test
A bending test was selected by modern codes as a reference test for fibre-reinforced concrete (FRC) mechanical characterization. However, specimen dimensions, lack of laboratories adequately equipped, and its complexity hinder its use. This study aims to evaluate the so-called Montevideo (MVD) test as an alternative to the results of EN14651 bending tests, simplifying FRC mechanical evaluation. A strong correlation was obtained using the results of experimental campaigns carried out in three countries. Using two linear transformations, MVD loads can be converted to the EN14651 ones, both for the limit of proportionality and for the residual loads, which are valid for all the CMOD reported in EN14651. These general rules seem valid for different types of concretes (conventional, Self-Compacting, Ultra High-Performance, Micro and Sprayed concrete), blended with different fibre types (plastic and steel) and a wide range of contents, which show both softening and hardening behaviour.
期刊介绍:
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.