Abstract
In the paper the methodology and test results of the investigation are presented and discussed of the influence of steel fibres on rheological and mechanical properties of Steel Fibre Reinforced Self-Compacting Concrete (SFRSCC). The rheological parameters of SFRSCC – behaves as Bingham body, their rheological parameters yield value g and plastic viscosity h were determined to using new kind of rheometer BT2 to mortar and concrete mix research. The mechanical parameter of SFRSCC – the cube compressive strength fc were presented as well. In the research, an experimental verification of and significance of an influence: volume fraction of fibres, fibres factor, lengths and shape of fibres on rheological properties of SFRSCC was investigated. In the paper the results obtained for mixes with 3 kind of steel fibres shapes are presented. Concrete mixtures are proportioned to provide the workability needed during construction and the required properties in the hardened concrete. The length of fibres does not have the significant influence on yield value g and plastic viscosity h of SFRSCC. The significant influence of the length of fibres on plastic viscosity h of tested hooked steel SFRSCC was observed only. The rheological properties of SFRSCC from workability point of view are better than for SCC with other types of fibres.
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