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Fiber-Reinforcement

Which one of the following is NOT composed with gypsum, also calcium sulphur dihydrate and the second softest mineral on the Mohs Hardness Scale? Choose 3

A. FRP
B. GFRG
C. FRG
D. GFRC
E. GRG
F. GFRS




Answer: A,D,F do not contain gypsum (fiber reinforced plastic or polymer, glass fiber reinforced concrete, glass fiber reinforced stone).
All choices are fiber-reinforced products that typically use fiberglass, but some can alternatively use carbon or aramid fibers.

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