Which statement about fiber-reinforced concrete is true?

Which statement about fiber-reinforced concrete is true?

• A. It contains fibrous materials to increase ductility and toughness
• B. It eliminates the need for reinforcement entirely
• C. It cures faster than standard concrete
• D. It cannot be used in slabs

Answer: (A)

Fiber-reinforced concrete uses dispersed fibers to change how the material behaves when stress is applied. The fibers act as crack bridges, catching and resisting crack growth as the concrete starts to crack. This energy absorption and bridging action make the concrete more ductile (it can deform more before failure) and tougher (it can absorb more energy without breaking). That’s why the statement about containing fibrous materials to increase ductility and toughness is true. It's helpful to note what isn’t true: fibers don’t completely eliminate the need for reinforcement in structural elements, curing time isn’t inherently faster because fibers are present, and fiber-reinforced concrete can be used in slabs and other elements to control cracking and improve durability.

Fiber-reinforced concrete uses dispersed fibers to change how the material behaves when stress is applied. The fibers act as crack bridges, catching and resisting crack growth as the concrete starts to crack. This energy absorption and bridging action make the concrete more ductile (it can deform more before failure) and tougher (it can absorb more energy without breaking). That’s why the statement about containing fibrous materials to increase ductility and toughness is true.

It's helpful to note what isn’t true: fibers don’t completely eliminate the need for reinforcement in structural elements, curing time isn’t inherently faster because fibers are present, and fiber-reinforced concrete can be used in slabs and other elements to control cracking and improve durability.