475 — REMOVAL AND REPLACEMENT OF HOT MIX ASPHALT (HMA) WEARING SURFACE 2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 400 STRUCTURES SECTION 475 — REMOVAL AND REPLACEMENT OF HOT MIX ASPHALT (HMA) WEARING SURFACE
475.01 Description
Remove the existing asphalt mix wearing surface from the bridge deck, remove additional areas of deteriorated concrete, perform deck repairs, and place asphalt mix wearing surface as specified in the Contract Documents.
475.02 Materials
Asphalt Mix 904.04
475.03 Construction
Refer to Section 508 and Section 504, and as specified herein. Remove the existing asphalt mix wearing surface to the limits shown on the Plans. Remove the asphalt mix wearing surface with equipment that can remove the wearing surface without damaging the existing concrete deck. Methods used may be as specified herein or as approved.
475.03.01 Equipment and Procedures.
Removal Equipment. Use equipment as specified in 426.03.02(a), 426.03.02 (c), 426.03.02 (d) and 426.03.02 (e). Removal Procedures. The Engineer will inspect and determine if any damage occurred to the existing bridge that was caused by the Contractor’s removal operations. Repair any of the damaged portions of the existing bridge to the satisfaction of the Engineer, at no additional cost to the Administration. All removed material shall become the Contractor’s property and shall be disposed of at approved spoil locations. Prior to the removal and replacement of the asphalt mix wearing surface, perform a test strip removal on the low-side shoulder of each bridge. The Engineer will determine the dimensions of the test strip in the field. Notify the Engineer at least 48 hours prior to performing the test strip operation. Schedule and perform the test strip removal so that the bridge work can be determined prior to performing any specified resurfacing on the approach roadway to the bridges. 475 — REMOVAL AND REPLACEMENT OF HOT MIX ASPHALT (HMA) WEARING SURFACE 2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Based on witnessing the test strip removal, the Engineer will determine the condition of the bridge deck and whether complete removal of the existing asphalt wearing surface is appropriate. If deemed appropriate, remove, and replace the asphalt mix wearing surface as specified in the Contract Documents. If the Engineer determines that the existing concrete bridge deck exposed during the test strip removal is so deteriorated as to be best rehabilitated by partial or full depth repairs as specified in Section 423, remove as much the asphalt wearing surface as practical to maintain traffic for inspection of the concrete deck. Repair any portion of the deteriorated existing concrete bridge deck exposed during the test strip work or any other work. Repair spalled concrete, voids, and other defects that are located within the proposed asphalt mix wearing surface in accordance with Section 423. Prior to the placement of asphalt mix over the existing concrete bridge deck or over an existing asphalt mix surface, apply a tack coat over the entire surface. Replace in-kind that portion of the asphalt mix wearing surface that was removed. Once the entire deck concrete has been repaired the in-kind asphalt has been replaced, add any additional asphalt overlay as specified in the Contract Documents.
475.04 Measurement and Payment
The payment will be full compensation for all chipping and removal of hot mix asphalt pavement, cleaning, abrasive blast cleaning, air blasting, flushing with water, curing, all saw cuts, disposal of material removed, and for all material, labor, equipment, tools, and incidentals necessary to complete the work.
475.04.01 Removal and Disposal of Existing Wearing Surface from Bridge, including that portion
removed during the test strip removal will be measured and paid for at the Contract unit price per square yard for the actual surface area removed from the bridge deck.
475.04.02 The new asphalt mix wearing surface will be measured and paid for at the Contract unit
price per ton for the pertinent Asphalt Mix for Bridge Deck item. Payment will also include tons of asphalt used in any Type 1 Deck Repairs as specified in Section 423.
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