Experimental Investigation of Ultra-high Performance Fiber Reinforced Concrete Slabs Subjected to Deformable Projectile Impact

Sovják, Radoslav; Vavřiník, Tomáš; Máca, Petr; Zatloukal, Jan; Konvalinka, Petr; Song, Yuan-Hong

doi:10.1016/j.proeng.2013.09.021

Cited by 58 publications

(15 citation statements)

References 7 publications

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“…Previous studies showed that the optimal fibre content with respect to the inservice deformable projectile impact lies around 2.0% by volume [11,12]. Purpose of this contribution was to extend a previous case study and find the optimal fibre content with respect to the residual velocity of the non-deformable in-service projectile after perforating UHPFRC slab.…”

Section: Research Significancementioning

confidence: 91%

Residual velocity of the non-deformable projectile after perforating the ultra-high performance fibre reinforced concrete

Sovják¹,

Vav²,

iník³

et al. 2014

WIT Transactions on the Built Environment

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This contribution is focused on the optimal fibre content in the ultra-high performance fibre reinforced concrete (UHPFRC) mixture with respect to the residual velocity of the non-deformable projectile after perforating the UHPFRC slabs. Impact velocity of the non-deformable projectile was in the range of 700 m/s. The UHPFRC used in this study exceeded 150 MPa in uniaxial compression and tensile strength was around 10 MPa. In total 24 UHPFRC slabs with different fibre content were tested for impact loading. In addition, 8 slabs were tested for comparison including high strength concrete (HSC) and conventional fibre reinforced concrete (FRC). It was verified experimentally that UHPFRC had an excellent impact resistance compared to conventional materials such as FRC or HSC. Further it was found that optimal fibre content in UHPFRC for impact resistant structures is 2% by volume. Usage of less than 2% of fibre concrete by volume led to higher residual velocity of the projectile after perforating the slab and also to higher debris fragment mass.

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Section: Research Significancementioning

confidence: 91%

Residual velocity of the non-deformable projectile after perforating the ultra-high performance fibre reinforced concrete

Sovják¹,

Vav²,

iník³

et al. 2014

WIT Transactions on the Built Environment

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“…Actually, many academic teams started to suggest protective solutions made of UHPFRC for impact, blast, as well as close charge [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Response of UHPFRCs in Tension under High Stress Rate

2018

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The paper presents a part of a full-experimental campaign characterizing various Ductal® mix designs (compressive strength of 150, 170, 210MPa) with various dosages of fibers (2% and 3.25%). The dynamic tests are performed by means of two Modified Hopkinson Bar devices with that are installed at the DynaMat Laboratory in Lugano. The tests, in tension at different velocities were performed on cylindrical notched specimens of 60mm in diameter and 60mm height (notch/radius = 0.20). The preliminary results present different rate sensitivity of the materials. Different behaviours are registered for the materials having matrix with special thermal curing respect to those cured as usual. An important increment of stress was obtained for the matrix where sand was partially replaced by Silica Fume. These results are the base for better understanding the mechanical behaviour in dynamic that will be obtained by further tests on Ultra-High Performance Fibre-Reinforced Concretes (various Ductal® classes). Such data will provide designers better overview of relevant properties of these materials for design of protective structures.

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“…Ultra-high-performance fibre-reinforced concrete (UH-PFRC) is an advanced cementitious composite with enhanced mechanical and durability properties that outperforms conventionally used concretes in many ways. Such a material with certain properties and specifications is well suited for energy absorption facade panels and key elements of building structures that may be exposed to impacts [1][2][3] or blast loads [4][5][6][7]. In the event of such a disaster, a large deformation of the structural member is expected, while the exposed member is required to continue to possess some residual capacity to carry the load.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fibre Aspect Ratio and Fibre Volume Fraction on the Effective Fracture Energy of Ultra-High-Performance Fibre-Reinforced Concrete

2016

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Experimental Investigation of Ultra-high Performance Fiber Reinforced Concrete Slabs Subjected to Deformable Projectile Impact

Cited by 58 publications

References 7 publications

Residual velocity of the non-deformable projectile after perforating the ultra-high performance fibre reinforced concrete

Residual velocity of the non-deformable projectile after perforating the ultra-high performance fibre reinforced concrete

Response of UHPFRCs in Tension under High Stress Rate

Effect of Fibre Aspect Ratio and Fibre Volume Fraction on the Effective Fracture Energy of Ultra-High-Performance Fibre-Reinforced Concrete

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