Some Problems Concerning the Determination of the Impact Resistance of Steel Fibre Reinforced Concrete

1989 ◽  
pp. 412-426
Author(s):  
Wojciech Radomski
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
Impact Resistance ◽  
Fibre Reinforced Concrete ◽  
Steel Fibre Reinforced Concrete ◽  
The Impact

Experimental Tests of Steel Fibre Reinforced Concrete Beams under Drop-Weight Impacts

2014 ◽  
Vol 626 ◽  
pp. 311-316 ◽  
Author(s):  
Yi Fei Hao ◽  
Hong Hao ◽  
Gang Chen
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
Concrete Beams ◽  
Plain Concrete ◽  
Fibre Reinforced Concrete ◽  
Steel Fibres ◽  
Steel Fibre Reinforced Concrete ◽  
Impact Tests ◽  
Drop Weight ◽  
The Impact

Concrete is a brittle material, especially under tension. Intensive researches have been reported to add various types of fibres into concrete mix to increase its ductility. Recently, the authors proposed a new type of steel fibre with spiral shape to reinforce concrete material. Laboratory tests on concrete cylinder specimens demonstrated that compared to other fibre types such as the hooked-end, deformed and corrugated fibres the new fibres have larger displacement capacity and provide better bonding with the concrete. This study performs drop-weight impact tests to investigate the behaviour of concrete beams reinforced by different types of steel fibres. The quasi-static compressive and split tensile tests were also conducted to obtain the static properties of plain concrete and steel fibre reinforced concrete (FRC) materials. The quasi-static tests were carried out using hydraulic testing machine and the impact tests were conducted using an instrumented drop-weight testing system. Plain concrete and concrete reinforced by the commonly used hooked-end steel fibres and the proposed spiral-shaped steel fibres were tested in this study. The volume dosage of 1% fibre was used to prepare all FRC specimens. Repeated drop-weight impacts were applied to the beam specimens until total collapse. A 15.2 kg hard steel was used as the drop-weight impactor. A drop height of 0.5 m was considered in performing the impact tests. The force-displacement relations and the energy absorption capabilities of plain concrete and FRC beams were obtained, compared and discussed. The advantage and effectiveness of the newly proposed spiral-shaped steel fibres in increasing the performance of FRC beam elements under impact loads were examined.

scholarly journals Effect of Steel Fibres Distribution on Impact Resistance Performance of Steel Fibre Reinforced Concrete (SFRC)

2016 ◽  
Vol 32 ◽  
pp. 012028
Author(s):  
Zakaria Che Muda ◽  
Nur Liyana Mohd Kamal ◽  
Agusril Syamsir ◽  
Chen Shao Yang ◽  
Salmia Beddu ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
Impact Resistance ◽  
Fibre Reinforced Concrete ◽  
Steel Fibres ◽  
Steel Fibre Reinforced Concrete ◽  
Resistance Performance

scholarly journals Effect of Thickness and Fibre Volume Fraction on Impact Resistance of Steel Fibre Reinforced Concrete (SFRC)

2016 ◽  
Vol 32 ◽  
pp. 012026
Author(s):  
Zakaria Che Muda ◽  
Fathoni Usman ◽  
Agusril Syamsir ◽  
Chen Shao Yang ◽  
Kamal Nasharuddin Mustapha ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Steel Fibre ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Impact Resistance ◽  
Fibre Volume ◽  
Fibre Reinforced Concrete ◽  
Steel Fibre Reinforced Concrete

scholarly journals Impact Response of Plates Under Drop Weight Impact Testing

1970 ◽  
Vol 7 (1) ◽  
pp. 1-11 ◽  
Author(s):  
S Elavenil ◽  
GM Samuel Knight
Keyword(s):  
Reinforced Concrete ◽  
Aspect Ratio ◽  
Energy Absorption ◽  
Steel Fibre ◽  
Impact Resistance ◽  
Impact Testing ◽  
Fibre Content ◽  
Fibre Reinforced Concrete ◽  
Steel Fibre Reinforced Concrete ◽  
Drop Weight

Concrete structures are often subjected to long term static and short term dynamic loads. Due to a relatively low tensile strength and energy dissipating characteristics, the impact resistance of concrete is poor. Research work carried out so far towards the development of concrete that exhibits improved impact resistance than conventional concrete showed that the steel fibre reinforced concrete has a good potential as a viable structural material for such applications. The overall objective of the study is to investigate the dynamic behaviour of steel fibre reinforced concrete plates under impact loading with respect to displacement, velocity and acceleration. In the drop weight test, eighteen plate specimens were tested with three different thicknesses of 20,25 and 30mm and with three different steel fibre contents of 0.5,0.75 and 1%.The edges of the plates were fixed on all sides. Displacement versus time, velocity versus time and acceleration versus time behaviour for all the plates tested were studied. It was found that when the aspect ratio of fibres is 50 and 75 there is a marginal increase in energy absorption for change in fibre content from 0.5 to 0.75%. There is a steep increase in energy absorption for a steel fibre content of 1% when the aspect ratio of fibre is 100.DOI: http://dx.doi.org/10.3329/diujst.v7i1.9580Daffodil International University Journal of Science and Technology Vol.7(1) 2012 1-11

scholarly journals Mechanical Performance of Steel Fibre Reinforced Concrete Exposed to Wet–Dry Cycles of Chlorides and Carbon Dioxide

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2642
Author(s):  
Victor Marcos-Meson ◽  
Gregor Fischer ◽  
Anders Solgaard ◽  
Carola Edvardsen ◽  
Alexander Michel
Keyword(s):  
Carbon Dioxide ◽  
Reinforced Concrete ◽  
Steel Fibre ◽  
Mechanical Performance ◽  
Corrosion Damage ◽  
Concrete Surface ◽  
Fibre Reinforced Concrete ◽  
Steel Fibre Reinforced Concrete ◽  
Toughness Variation ◽  
The Impact

This paper presents an experimental study investigating the corrosion damage of carbon-steel fibre reinforced concrete (SFRC) exposed to wet–dry cycles of chlorides and carbon dioxide for two years, and its effects on the mechanical performance of the composite over time. The results presented showed a moderate corrosion damage at fibres crossing cracks, within an approximate depth of up to 40 mm inside the crack after two-years of exposure, for the most aggressive exposure conditions investigated. Corrosion damage did not entail a significant detriment to the mechanical performance of the cracked SFRC over the time-scales investigated. Corrosion damage to steel fibres embedded in uncracked concrete was negligible, and only caused formation of rust marks at the concrete surface. Overall, the impact of fibre damage to the toughness variation of the cracked composite over the time-scale investigated was secondary compared to the toughness variation due to the fibre distribution. The impact of fibre corrosion to the performance of the cracked composite was subject to a size-effect and may only be significant for small cross-sections.

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