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Fibre reinforced concrete is defined by the unit as a composite containing discrete, discontinuous, uniformly dispersed fibres. Which of the following is therefore NOT classed as a fibre reinforcement?
Answer & Solution
Correct answer: D.
1. The definition stresses three properties: discrete, discontinuous and uniformly dispersed.
2. Long continuous wires or rods through the matrix violate the discontinuous requirement.
3. The unit explicitly excludes continuous meshes, woven fabrics and long wires from fibre reinforcement.
4. Short steel fibres, chopped glass strands and polypropylene strands all meet the discrete criterion.
5. So continuous wires belong to conventional reinforcement, not fibre reinforcement.
_Source: IGNOU Concrete Technology, Unit 11 "Special Concrete" (Light Weight, Aerated, No-Fines, High Density, Fibre Reinforced, Polymer Concrete)._
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