Precast concrete
Complete removal of a concrete deck is done when it is too deteriorated to keep, but the structural concrete is adequate or can be easily repaired after the hydrodemolition has taken place. It can also be a preferred alternative where a bridge deck has been compromised during initial construction but not yet open to traffic. It allows the preservation of the reinforcement while the deck concrete can be fully replaced to meet the design intent and avoid the need for potential future repairs under traffic. Precast concrete beams are often used in structures such as bridges and parking garages. Hydrodemolition has been used successfully to remove concrete over these beams, where alternate methods such as jackhammers might have caused fracture of the beams.