570-573 for Highway Construction Page 435 of 715 SECTION 569 – REMOVAL OF EXPANSION JOINT
569.01 Description.
Remove existing joint material consisting of elastomeric concrete, steel armor angles, and concrete within the removal limits specified.
569.02 Materials.
Not specified.
569.03 Construction Requirements.
Before starting work, obtain approval for the appropriate joint removal methods and equipment. Remove steel armor angles and concrete within the proposed blockout so the concrete is not damaged beyond the limits. Use jackhammers with a nominal rating of 15 pounds or less and held at an angle 45° or less from the sur face of the slab to remove the existing concrete within the new nosing limits specified. Notify the Engineer immediately if unsound concrete is encountered beyond the removal depth. Repair concrete overbreak or other damage outside the lim its specified at no additional cost to the Department.
569.04 Method of Measurement.
The Engineer will be measure acceptably completed work by the foot.
569.05 Basis of Payment .
The Department will pay for accepted quantities at the contract unit price as follows: Pay Item Pay Unit Removal of Expansion Joint ................................................................... FT Removed materials are the Contractor’s property and must be properly disposed. 570-573 for Highway Construction Page 436 of 715 SECTIONS 570 -573 - RESERVED for Highway Construction Page 437 of 71 5 SECTION 574 - ANTI -GRAFFITI COATING
574.01 Description.
Coat exposed surfaces of designated concrete superstructures and substructures, retaining walls and MSE walls and coping to a line one foot below finished grade. Cover surfaces of the bridges and walls except the deck surfaces and the underside of the decks.
574.02 Materials.
Provide anti -graffiti coating system consisting of either a one or two coat system to create a continuous pinhole- free film; the combination of coatings may be pigmented or clear. Use an aliphatic urethane system with a clear finish for graffiti system topcoat coating. Use a permanent type anti -graffiti coating for the protection of raw concrete substrates. Provi de color pigment of base or sealer coat specified on the plans. Apply in accordance with the manufacturers guidelines so that the coating system qualifies for all the guarantees and warranties provided by the manufacturer. Furnish the terms of the guarantees and warranties given by the manufacturer.
574.03 Construction Requirements.
Provide an ordinary surface finish on all surfaces to be coated in accordance with 502.03 or provide textured concrete surface as specified . Cure concrete in accordance with 502.03 after surface acceptance. Sandblast all surfaces to be coated clean and without any foreign substances, such as form release agents, curing compounds, dirt, laitance, leachates, oils, grease or other surface contaminants. Apply base or sealer coat to the concrete surfaces as required by manufacturer. Apply anti -graffiti coating in accordance with manufacturer’s written instructions, including surface pre paration, application rate and environmental conditions.
574.04 Method of Measurement.
The Engineer will measure acceptably completed work by the square foot.
574.05 Basis of Payment .
The Department will pay for acceptable quantities at the contract unit price as follows: Pay Item Pay Unit Anti-Graffiti Coating ................................................................................ SF