Fibres used in FRC are also called as -
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A.
Secondary reinforcements
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B.
Slim reinforcements
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C.
Slender reinforcements
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D.
Super reinforcements
Correct Answer:
A. Secondary reinforcements
Explanation:
Fibres used in Fibre-Reinforced Concrete (FRC) are commonly referred to as secondary reinforcements. While traditional primary reinforcement, such as steel rebar, is designed to carry the main structural loads and provide bending strength, fibres serve a supplementary role. They are distributed throughout the concrete mix to form a three-dimensional network that specifically targets crack control.
By bridging micro-cracks as they begin to form, these fibres prevent them from expanding into larger, structural cracks. This process enhances the material's overall toughness, impact resistance, and ductility, effectively improving the long-term durability and serviceability of the concrete without replacing the primary structural steel.
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