Slurry Infiltrated Fibre Concrete with Waste Steel Fibres from Tires - The Behaviour under Static and Dynamic Load

Abstract

Waste fibres coming from the recycling process of the old tires were incorporated in slurry infiltrated fibre concrete (SIFCON), which is a special type of high performance fibre reinforced concrete with high fibre content. The technological feasibility (i.e. suitability of the waste fibres for SIFCON technology) was assessed using infiltration test and homogeneity test. Test specimens were prepared with three volume fractions (5; 7.5 and 10% by vol.) of waste unclassified fibres. SIFCON with industrial steel fibres (10% by vol.) and high performance fibre concrete with industrial fibres were also cast and tested for comparison purposes. Quasi-static mechanical properties were determined. The impact test was carried out by using an in-house manufactured impact testing machine based on drop test principle. Realized tests confirmed the possibility of using the waste fibres for SIFCON technology. The obtained results indicate, that the usage of waste fibres does not significantly reduce the values of SIFCON flexural and compressive strength at quasi-static load and energy absorption at dynamic load, the values were comparable to the specimens with industrially produced fibres. With increasing fibre content, the mechanical parameters and energy-absorption characteristics at dynamic load are increasing as well.

Experimental Investigation on Dynamic Tensile Behaviors of Engineered Cementitious Composites Reinforced with Steel Grid and Fibers

“…The better performance of fiberreinforced concrete can even be maintained under different strain rate loads [5][6][7][8][9][10][11][12]. The energy absorption capacity and toughness of concrete can especially be enhanced by adding more fibers [13][14][15][16][17][18][19].…”

High Strain Rate Compressive Behavior of Micro-Fibre Reinforced Fine Grained Cementitious Composite

“…Compared to ordinary high-performance fibrereinforced concrete, this enhanced behavior indicates a superior ductility, energy absorption capacity and overall integrity of SIFCON under dynamic load [6], and thus has potential for applications in protective structures. Excellent blast resistance of SIFCON in terms of overall integrity and internal damage was concluded in [7], but some fragmentation of the matrix was admitted. This can be prevented by using small amount of micro-fibre reinforcement in the slurry, but more information in this field must be provided, as the studies comparing the compressive high strain rate properties of fine grained fibre reinforced cementitious composites are very limited [8] and mostly focused on PVA and steel reinforcement [9] and lower strain rates.…”