Steel fibre concrete

Renault s new automotive plant in Tangier, Morocco (annual capacity of 170,000 vehicles with possible increase to 400,000) also employed steel-fibre concrete for jointless floor slabs. 165,000 m of SFRC was the technical solution to (1) comply with the fast-track construction programme demanded by Renault, as reinforcement was added directly in the concrete and (2) eliminate the need for sawcut contraction joints and dramatically reduced year-to-year maintenance costs. Class C25/30 and C30/37 concretes were used with 35 0 kg/m dosages of steel fibres (Lazzari, 2012). 

Lazzari, J., 2012. Driving forward steel-fibre concrete. Concrete Engineering International, January, pp. 49. 

Kasperkiewicz, J., Skarendahl, A. (1988) Fracture resistance evaluation of steel fibre concrete , in Proc. Int. Symp. Brittle Matrix Composites 1, A. M. Brandt, I. H. Marshall eds, Jablonna, London Elsevier Applied Science, pp. 619—28. 

Nemeeger, D., Vanbrabant, J., Stang, H. (2003) Brite Euram program on steel fibre concrete subtask durability corrosion resistance of cracked fibre reinforced concrete , in Proc. Int. RILEM Workshop Test and Design Methods for Steelfibre Reinforced Concrete, RILEM Publ. SARL, pp. 47-66. 

Kasperkiewicz, J., Malmberg, B., Skarendahl, A. (1978) Determination of fibre content, distribution and orientation in steel fibre concrete by X-ray technique , in Proc. RILEM Symp. Testing and Test Methods of Fibre Cement Composites, R. N. Swamy ed., Lancaster The Construction Press, pp. 297-305. 

Hannant, D. J., Edgington, j. (1975) Durability of steel fibre concrete, in Proc. RILEM Symp. Fibre Reinforced Cement and Concrete, Lancaster Construction Press, pp. 159-69. 

Toughness measurements on steel fibre concrete at elevated temperatures, ... 

Macroscopically heterogeneous materials, such as concrete, are even in the virgin state severely cracked. The size distribution of these cracks is directly governed by that of the particles in the material. Steel fibres dispersed in such a matrix have a length roughly twice the maximum grain size. A composite model of steel fibre concrete on mesolevel inevitably has to encompass particles, cracks and fibres. They mutually interact in a complicated way when the material body is stressed. Only somewhat simplified concepts are however accessible for design purposes. 

BONZEL J., SCHMIDT M. "Distribution and orientation of stell fibres in concrete and their influence on the characteristics of steel fibre concrete" - RILEM SYMPOSIUM, 13-17 July Sheffield 1986. 

Swamy, R.N., Sa ad A. Al-Ta-Ta an, Deformation and Ultimate Strength in Flexure of Reinforced Concrete Beams Made with Steel Fibre Concrete. ACI Journal, 1981, Sept/Oct. pp 395-405. 

FRACTURE RESISTANCE EVALUATION OF STEEL FIBRE CONCRETE... 

Guan Liqiu and Zhao Guofan, A study on the mechanism of fibre reinforcement in short steel fibre concrete, RILEM Symposium FRC86... 

A. H i I lerborg, Determination and significance of the fracture toughness of steel fibre concrete , in S.P. Shah and A. Skarendahl (eds) Steel Fibre Concrete, US-Sweden Joint Seminar, Stockholm, 1985, pp. 257-271. 

T.Y. Lim, P. Paramasivam and S.L. Lee, Analytical model for tensile behaviour of steel-fibre concrete . Amen Conor. Inst. Mat J. 84,1987, 286-298. 

P. Stroeven and Y.M. de Haan, Structural investigations on steel fibre concrete by stereological methods , in H.W. Reinhardt and A.E. Naaman (eds) High Performance Fibre Reinforced Cement Composites, London E FN SPON, 1992, pp. 407-418. 

For very high volume steel fibre concretes, the effect of the fibres on the flexural strength can be quite dramatic. For some reactive powder concretes (RPC), flexural strengths can reach 60 MPa with about 2.4% fibres by volume, and 102 MPa with 8% fibres [60]. Ductal , another RPC, can achieve a flexural strength of about 45 MPa, with 2% by volume of 13-15 mm long fibres with diameters of 0.2 mm [61] similarly. Sun etal. [62] obtained strengths of about 60 MPa with 4% by volume of 13 mm long by 0.175 mm diameter fibres. 

Steel fibres have been found to improve the fatigue performance of pavements [97], particularly when high performance steel fibre concretes are used [98]. They also appear to improve the fatigue properties of conventionally reinforced structural elements [99-101]. 

R.N. Swamy and H. Stavrides, Some properties of high workability steel fibre concrete , in A. Neville (ed.) Fibre-Reinforced Cement and Concrete, RILEM Symp., The Construction Press, Lancaster, England, 1975, pp. 197-208. 

H.A. Kormeling and H.W. Reinhardt, Strain rate effects on steel fibre concrete in uniaxial tension , int J. Cement Composites and Lightweight Concrete. 9, 1987,197-204. 

From the studies cited above, the mechanical properties of self-compacting FRC show the strength and toughness that one would normally associate with various FRC mixes. In addition, Walter etal. [85] found a good bond between a thin self-compacting steel fibre concrete overlay cast on a steel plate, even though the only measure taken to prepare the steel surface was sandblasting. 

T.-Y Urn, P. Paramasivam and S.-L. Lee, Behaviour of reinforced steel-fibre-concrete beams in flexure , J. Struct Eng. ASCE 113,1987,2439-2458. 

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