Abstract
The paper presents results of tests conducted on self-compacting mixes with the addition of engineered steel fibres. There were used four types of fibres. The fibres were added at 5 levels of the volume ratio. Firstly, fresh mixes were tested (slump flow, class of viscosity and rheological characteristics). Secondly, properties of hardened concretes were tested (compressive strength and flexural strength). Hardened concretes were also tested using non-destructive method, namely X-ray computed tomography. The tests confirmed the possibility of using steel fibres for reinforcing self-compacting concrete. The workability of mixes was maintaining and the assumed technological parameters for hardened concretes were kept. It was found that longer fibres are more likely to be oriented parallel to the direction of the mix flow. Thus, they can operate efficiently under flexural loading of the cast beam.
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