Resistance of slim UHPFRC targets to projectile impact using in-service bullets

Sovják, Radoslav; Vavřiník, Tomáš; Zatloukal, Jan; Máca, Petr; Mičunek, Tomáš; Frydrýn, Michal

doi:10.1016/j.ijimpeng.2014.10.002

Cited by 103 publications

(27 citation statements)

References 23 publications

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“…[13] and Sovják and etc. [14] proposed that the straight steel fibers with 1.5%-2% by volume is the optimum choice with respect to the mechanical properties, workability, crack prohibiting ability as well as the costs.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…[13] and Sovják and etc. [14] conducted the deformable (Pb core) and non-deformable (steel core) small-caliber bullet (7.92mm in diameter, 8.04g at weight) impacting tests on UHP-SFRC slabs with the striking velocity at ~710m/s, respectively. The influences of steel fibers volumetric fractions (1%-3%) on the DOP, the impact crater size, and debris fragment mass were studied, respectively.…”

Section: A N U S C R I P Tmentioning

confidence: 99%

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Projectile impact resistance of corundum aggregated UHP-SFRC

Fang

Gong

et al. 2015

International Journal of Impact Engineering

111

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Section: Accepted Manuscriptmentioning

confidence: 99%

Section: A N U S C R I P Tmentioning

confidence: 99%

Projectile impact resistance of corundum aggregated UHP-SFRC

Fang

Gong

et al. 2015

International Journal of Impact Engineering

111

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“…The specimens remained in steel forms under laboratory conditions (20°C, at a relative humidity of 50 %) until the time when the hydrothermal process took place. The hydrothermal process took place at various ages of the fresh samples (12,15,18, 21 and 24 hours).…”

Section: Curing Before Hydrothermal Processmentioning

confidence: 99%

“…Applied CEM I 42.5 R cement replaces the commonly used CEM 52.5 R in the UHPC category [12,13]. The philosophy of manufacture is in compliance with the technology of UHPC productions.…”

Section: Compositionmentioning

confidence: 99%

Analysis of Mechanical Properties of Hydrothermally Cured High Strength Cement Matrix for Textile Reinforced Concrete

2015

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Abstract. The main objective of this article is to describe the influence of hydrothermal curing conditions in an autoclave device (different pressure and temperature), which took place at various ages of a fresh mixture (cement matrix -CM, and fibre-reinforced cement matrix -FRCM), on textile reinforced concrete production. The positive influence of autoclaving has been evaluated through the results of physical and mechanical testing -compressive strength, flexural strength, bulk density and dynamic modulus of elasticity, which have been measured on specimens with the following dimensions: 40 × 40 × 160 mm 3 . In addition, it has been found that increasing the pressure and temperature resulted in higher values of measured characteristics. The results indicate that the most suitable surrounding conditions are 0.6 MPa, and 165°C at the age of 21 hours; the final compressive strength of cement matrix is 134.3 MPa and its flexural strength is 25.9 MPa (standard cured samples achieve 114.6 MPa and 15.7 MPa). Hydrothermal curing is even more effective for cement matrix reinforced by steel fibres (for example, the compressive strength can reach 177.5 MPa, while laboratory-cured samples achieve a compressive strength of 108.5 MPa).

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“…[7e10]. Based on the experimental investigations on the influences of steel fibers volumetric fractions (1e3%) on the DOP, impact crater size, and debris fragment mass of ultra-high performance steel fiber reinforced concrete (UHP-SFRC) with no coarse aggregates, M aca et al [11] and Sovj ak et al [12] concluded that the optimum volumetric ratio of straight steel fibers (13 mm in length and 0.15 mm in diameter) with respect to the mechanical properties, workability and resistance to projectile impact is 2%.…”

Section: Introductionmentioning

confidence: 99%