Experimental Ballistic Loading of Steel Fiber Reinforced Concrete Slabs and Unreinforced Concrete Slabs by Plastic Explo
The article presents the results of experimental tests carried out on steel fiber reinforced concrete slabs and on unreinforced concrete slabs. The aim of the experimental tests was to determine its suitability for anti-spalling layer by using effects of
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tract. The article presents the results of experimental tests carried out on steel fiber reinforced concrete slabs and on unreinforced concrete slabs. The aim of the experimental tests was to determine its suitability for anti-spalling layer by using effects of plastic explosive PlHx 30 explosion. Slabs of steel fiber reinforced concrete and of plain concrete were made according to the same recipe. For this experiment, high-strength concrete with strength class C70/85 was used. In the mixture of steel fiber reinforced concrete, it was added 30 kg of fibers per 1 m3, type Dramix RC-65/50-BN. The interior surface of shelters walls must be protected against the concrete spalling, which are caused by detonations on the outside surface. The results of the tests proved that steel fiber reinforced concrete is not a suitable material for the anti-spalling layer. Keywords: Steel fiber reinforced concrete Plain concrete layer Ballistic loading Plastic explosive PLHx 30
Anti-spalling
1 Introduction The efficient defense against contemporary threats requires the use of new materials that are able to bear loading from blast, penetration or puncture. The amplifying materials that meet these requirements are described in [1]. In addition, some types of building protection against the explosion of an improvised explosive device are described in [1]. Testing of metallic materials suitable for such protection is described in [2]. The loading structure can also be used for improvised explosives such as disclosed in [3]. This article will also deal with only cement composites. Concrete, widely used material especially at civil engineering possesses two fundamental disadvantages: low strength at tensile stress and fragility while damaged. Such two disadvantages are partly removed in common constructions by placing in the conventional reinforcement that has been inserted into building blocks as individual steel rods, mesh and/or grids. Both mentioned disadvantages are eliminated using this reinforcement because of rightly placed reinforcement that is capable of to take up resultant force of tensile stresses as well as to avoid the failure of individual fragile construction elements [4–6].
© Springer Nature Singapore Pte Ltd. 2017 A. Kravcov et al. (eds.), Durability of Critical Infrastructure, Monitoring and Testing, Lecture Notes in Mechanical Engineering, DOI 10.1007/978-981-10-3247-9_13
Experimental Ballistic Loading of Steel Fiber
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2 Reinforcement By employing the conventional reinforcement the structure behavior changes, however the concrete properties remain the same. We can reach increase in tensile strength and change of fragile character in concrete failure only by direct reinforcement of concrete structure. To achieve such reinforcement there is a necessity to use reinforcing elements meeting the size of components that create its structure. The reinforcing element is a fiber. The important advantage of concrete is that all production technologies enable its reinforcement by fibers. Not only fibers influence the propert
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