Blast Resistance of Slurry Infiltrated Fibre Concrete with Waste Steel Fibres from Tires

Abstract

The utilization of waste steel fibres (coming from the recycling process of the old tires) in production of blast resistant cement based panels was assessed. Waste fibres were incorporated in slurry infiltrated fibre concrete (SIFCON), which is a special type of ultra-highperformance fibre reinforced concrete with high fibre content. The technological feasibility (i.e. suitability of the waste fibres for SIFCON technology) was assessed using 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 ultra-highperformance fibre concrete with industrial fibres were also cast and tested for comparison purposes. Quasi-static mechanical properties were determined. Real blast tests were performed on the slab specimens (500x500x40 mm) according to the modified methodology M-T0-VTU0 10/09. Damage of the slab, the change of the ultrasound wave velocity propagation in the slab specimen before and after the blast load in certain measurement points, the weight of fragments and their damage potential were evaluated and compared. 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 - the values were comparable to the specimens with industrially produced fibres. With increasing fibre content, the mechanical parameters are increasing as well. Using of the waste fibres reduces fragmentation of SIFCON at blast load due to the fibre size parameters. Using of low diameter fibres means more fibres in the matrix and thus better homogeneity of the whole composite with less unreinforced areas. Regarding the blast tests, the specimen with waste steel fibres showed the best resistance and outperformed also the specimen with commercial fibres. Using of waste fibres in SIFCON technology can reduce the price of this composite by 70 % by keeping the original SIFCON extraordinary properties, which makes it very competitive material in the concrete area.

Experimental study on flexural strength of slurry infiltrated fibrous concrete (SIFCON) produced with various percentages of waste steel fibers recovered from used tires

“…Furthermore, waste steel fibers extracted from scrap tires are less expensive than industrial steel fibers, which is also an added advantage for SIFCON applications. Studies regarding the usage of waste steel fibers in the production of SIFCON are limited based on the available literature [13,14,15,16,17].…”

Investigation of usability of recycled aggregate in SIFCON production

“…Al-Hadithi and Al-Hadithi [17] examined the usability of waste plastic fibers in SIFCON production. Celikten and Canbaz [18] and Drdlova et al [19] investigated the properties of SIFCON composites produced using waste steel fibers obtained from waste automobile tires. Canbaz and Celikten [20] explored the effect of crumbed waste automobile tire rubbers on the properties of SIFCON composites.…”