The experimental investigation of the mechanical properties of steel fibre-reinforced concrete according to different testing standards
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2020
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Abstrakt
Steel fibre-reinforced concrete (SFRC) is widely applied in the construction of civil
infrastructure projects, including the following: industrial floors, slabs, walls, and foundations.
The application of steel fibres in the reinforcement of concrete remarkably improves the postcracking behaviour of such concrete. In order to estimate this property, the energy involved in
absorption is measured by using several valid testing standards: EVS-EN 14651:2005, EVS-EN
14488-5:2006, and ASTM C1550-12a. The objective of this study was to carry out a comparable
analysis of the results that have been obtained using previously-mentioned standards and to be
able to find a more reliable method for the determination of the fracture toughness of SFRC
specimens. Experiments were carried out in accordance with the chosen standards. It was
concluded that procedure involved in the ASTM standard provides a smaller variability of results
with better levels of repeatability, therefore a smaller volume of specimens can be tested in one
series in order to achieve reliable results.
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Märksõnad
SFRC, steel fibres, flexural strength, energy absorption capacity, articles