Steel Fibres are short pieces of round wire, of low carbon steel, cold drawn, with high tensile strength of 700 N/mm2 to 1400 N/mm2, with low elongation and ranging from a diameter of 0.2 mm to 1.3 mm and length of 30 mm to 80 mm. They are undulated, hooked end, flat end, straight, twisted or round head at both ends for mechanical anchoring in the concrete mix. Fibre diameter and aspect ratio (Length /dia. of wire) effects anchorage.
Steel fibre’s tensile strength, modulus of elasticity, stiffness modules and mechanical deformation provides an excellent means of internal mechanical interlock. This provides the concrete with increased ductility that can be used in applications of high impact and fatigue without the fear of brittle concrete failure.
The concrete with the fibre reinforcement has been widely used in construction industry recently. However, the use of fibre in cement concrete is no longer a new idea or concept. Fibre has already started to use as the concrete reinforcement since prehistoric period. In the past, horsehair was added into the mortar and straw to reinforce the mud bricks.
Today, many types of research still carry on finding out more type of fibre that is able to use as the concrete reinforcement. Research shows that the conventional civil infrastructures which made out of steel reinforced concrete can be easily deteriorated in an aggressive environment which eventually leads to the failure of the structure. As to prevent the occurrence of the structural failure, constant maintenance and rehabilitation are required.
Therefore, the involvement of huge amount of maintenance and rehabilitation cost is inevitable. To come out with a most economical solution, concrete specialists have invented a new method, they replaced the steel reinforcement with fibre reinforced concrete and it is also known as FRC. Fibre increases the concrete toughness, tensile strength, provide fatigue and impact resistance as well as improve the post-cracking ductility performance.
Most importantly, for any civil work, QUALITY and COST BENEFIT is of utmost importance and thus, steel fibres offer you that.
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