Specifications include, but are not limited to: CONCRETE REPAIR: Description This provision entails the repair of deteriorated or damaged concrete manifested as spalling, delamination, cracking, crushing or breakage. This type of repair shall consist of patching defective concrete with suitable materials. Concrete repair shall be performed at locations indicated on the plans and/or as authorized by the Engineer.; Material Requirements Products appearing on the Approved Products List under “Pavement and Structural Patching Materials” may be used without further qualification. Products suitable for vertical and overhead placement are shown on a continuation of this list. Products used shall be prescribed by the manufacturer for the purpose for which they are to be used.; Equipment Sand blasting equipment for cleaning of reinforcing steel and adequate tools for placement of repair material shall be used as needed. Effective mixing equipment shall be used for mixing concrete repair materials.; CONCRETE BRIDGE DECK/APPROACH REPAIR WITH CLASS 47BD 4000 CONCRETE: 1. The work shall include removing unsound concrete, disposing of the old concrete, preparation of the repair area, and furnishing, placing, finishing, and curing the concrete for repairs to bridge decks and/or approaches.; Equipment: 1. Surface preparation equipment shall be of the following types: a. Concrete saws capable of sawing to a specified depth.; b. Sandblasting equipment able to remove rust and concrete from exposed reinforcing bars. The equipment shall also be able to remove loose and fractured particles from the prepared concrete surface.; c. Power-driven hand tools will be allowed with the following restrictions: (1) Jackhammers greater than the nominal 60-lb (27 kg) class shall not be used.; (2) Jackhammers or chipping tools shall not be operated at an angle greater than 45 degrees measured from the deck surface.; 2. Vibrating screeds, either mechanical or hand operated shall be used to finish the concrete.
