Question

Which of the following materials are used as fibres in fibre-reinforced plastics?

I) E-glass

II) Epoxy

III) Kevlar 49

1. Only I and III
2. Only I and II
3. Only II and III
4. I, II and III

Answer 1

Correct Answer - Option 1 : Only I and III

Explanation:

FRP (fiber reinforced plastics)

• These are composite materials made of a polymer matrix reinforced with fibres.
• E-glass and Kevlar 49 are used as fibres in fibre-reinforced plastics.
• This recently developed material can be used for the strengthening of reinforced concrete (RC) or masonry structures or as a replacement of steel plate bonding.
• The strength to weight ratio as well as corrosion resistance of FRP is high.
• Further, the weight of an FRP plate can be as low as 20% that of a steel plate while it can be 2 to 10 times stronger also.
• These plates need to be attached to the affected structure using epoxy mortar.