Mix design of UHPFRC and its response to projectile impact

Mix design of UHPFRC and its response to projectile impact 1 Introduction</h5> Increasing requirements for durability, safety and security of concrete structures push its development still further. High-rise buildings and other structures of strategic importance such as government buildings and television towers have become a symbol of developed cities worldwide. However, such structures are threatened by possible extreme-load events like earthquakes, gas explosions, car or plane impact and in recent years to terrorist attacks. New hi-tech materials such as ultra-high performance fiber reinforced concrete (UHPFRC) are ideal for applications where high compressive and tensile strength, small thickness and high energy absorption capacity are required. For instance, the utilization of high strength concrete allowed construction of many skyscrapers around the world. In addition, UHPFRC significantly improves blast resistance of cladding panels and walls while maintaining its standard thicknesses and appearance [1] .</P>UHPFRC can be characterized as a composite containing large volume of steel fibers, low water-binder ratio, high microsilica content and absence of coarse aggregate i.e. larger than 4 mm [2] . It has outstanding material characteristics such as self-consolidating workability, very high mechanical properties and low permeability which results in excellent environmental resistance [3] . Typical strengths are 150–200 MPa in compression and 7–15 MPa in uniaxial tension. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Impact Engineering Elsevier

Mix design of UHPFRC and its response to projectile impact

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Publisher
Elsevier
Copyright
Copyright © 2013 Elsevier Ltd
ISSN
0734-743X
D.O.I.
10.1016/j.ijimpeng.2013.08.003
Publisher site
See Article on Publisher Site

Abstract

1 Introduction</h5> Increasing requirements for durability, safety and security of concrete structures push its development still further. High-rise buildings and other structures of strategic importance such as government buildings and television towers have become a symbol of developed cities worldwide. However, such structures are threatened by possible extreme-load events like earthquakes, gas explosions, car or plane impact and in recent years to terrorist attacks. New hi-tech materials such as ultra-high performance fiber reinforced concrete (UHPFRC) are ideal for applications where high compressive and tensile strength, small thickness and high energy absorption capacity are required. For instance, the utilization of high strength concrete allowed construction of many skyscrapers around the world. In addition, UHPFRC significantly improves blast resistance of cladding panels and walls while maintaining its standard thicknesses and appearance [1] .</P>UHPFRC can be characterized as a composite containing large volume of steel fibers, low water-binder ratio, high microsilica content and absence of coarse aggregate i.e. larger than 4 mm [2] . It has outstanding material characteristics such as self-consolidating workability, very high mechanical properties and low permeability which results in excellent environmental resistance [3] . Typical strengths are 150–200 MPa in compression and 7–15 MPa in uniaxial tension.

Journal

International Journal of Impact EngineeringElsevier

Published: Jan 1, 2014

References

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