Specifications include, but are not limited to: This work shall consist of the removal of bridge deck concrete using hydrodemolition equipment as preparation for bridge deck repairs or overlay. Rotomilling of the existing concrete deck prior to hydrodemolition will not be allowed. All work shall be performed in accordance with the details shown on the plans or as directed by the Engineer. The hydrodemolition equipment shall be a selfpropelled machine that utilizes a high pressure water jet stream capable of removing concrete to the depths shown on the plans or as directed by the Engineer and be capable of removing rust and concrete particles from reinforcing steel. Hand-held wands or pneumatic hammers, 30- pound class maximum, shall be used to remove unsound concrete in areas that are inaccessible or inconvenient to the self-propelled machine, such as areas under reinforcing steel or around expansion joints. Pneumatic hammers and chipping tools exceeding a 15-pound class shall not be operated at an angle exceeding 45° relative to the surface of the bridge deck. Such tools may be started in the vertical position but must be immediately tilted to a 45° operation angle.
