Polymer impregnated concrete (PIC) is produced by:
Choose the correct answer
Adding polymer fibres to the mix
Impregnating hardened concrete with monomer which is then polymerized — fills pores giving very high strength
Replacing water with polymer solution in mixing
Coating only the surface with epoxy
Correct Answer
B. Impregnating hardened concrete with monomer which is then polymerized — fills pores giving very high strength
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PIC: Hardened concrete is dried, vacuumed to remove air and moisture, then monomer (methyl methacrylate, MMA) is impregnated into pores by vacuum or pressure, then polymerized (by gamma radiation or thermal method). Result: very high strength (up to 200 MPa), very low permeability, chemical resistance. Used for: bridge decks, marine structures, tunnels.
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