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1 2015

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Influence of steel fibres addition on mechanical and selected rheological properties of steel fibre high-strength reinforced concrete

Bywalski C., Kamiński M., Maszczak M., Balbus Ł.

Archives of Civil and Mechanical Engineering

2015

Vol. 15, no. 3

742--750

The paper discusses the mechanical and selected rheological properties of steel fibre high-strength reinforced concrete (SFHSRC). The creep deformation in compression, total shrinkage strain, compression strength, longitudinal modulus of elasticity and tensile strength of steel fibre high-strength reinforced concrete have been presented in the research. Steel reinforcements with a length of 13 mm and a diameter of 0.2 mm have been used. The content of fibres in 1 m3 of the concrete mix was 0, 78.5, 157 and 235.5 kg. Four batches of composite materials with different mixture compositions have been tested. The average compressive strength ranged from 128.2 to 147.7 MPa. The functional relations describing the increase of shrinkage and creep deformation in time have been discussed. The summary contains conclusions related to the rheological deformation of steel fibre high-strength reinforced concrete and the effects of steel fibre content on the mechanical properties of such composite materials.