Abstract
The influence of strain rate and low temperature on the mechanical properties of steel fibre reinforced concrete and on a reference plain concrete is reported. About 80 specimens were tested at strain rates of 1.25 × 10 −6 to 20°C and − 170°C. Straight fibres were used at 1.5% and 3% volume. The results show a considerable increase of tensile strength, strain at maximum stress and fracture energy due to rate effect. Most properties are also improved at low temperature. Statistical relations are given which show the influence of the most important variables. The theory of deformation kinetics could be applied to plain concrete, but not to fibre reinforced concrete, to explain temperature and strain rate effects.
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