Opening of Quotes - 2024 Contracted Microsurfacing Proj No. 124-049 - Asphalt Restoration Srvs.

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Construction: a. Area shall be swept clean prior to setting infrared heating unit. b. Work shall only be performed when the ambient and surface temperatures are 45°F or above. c. The infrared heating unit shall be lowered to within six to nine inches of the existing pavement. The heated area must extend at least six inches outside of the area of repair. Apply heat to the area continuously until the surface is heated to a depth of approximately two inches. When the existing bituminous surface can be worked with a rake, proper heat penetration has been achieved. d. Under windy conditions, metal shields will be placed on three sides to block the wind and provide for an even heated surface. e. Etch an outline of the repair area with the back of a rake at least three inches beyond the edges of the repair area. Scarify the existing bituminous surface within the repair area to the full heated depth. Ensure that a vertical surface around the edge of the repair area is achieved by rake. f. Remove existing bituminous material (as required by adjacent grades) to allow for the placement of new bituminous mix within the area of the patch. Rejuvenating agent shall be applied at a rate of 0.10 to 0.20 gal 1 syd prior to placement of new bituminous material. g. Reshape patched area by hand with rake and lute to match grade of existing adjacent pavement. After reshaping, reapply rejuvenating agent at a rate of 0.10 to 0.20 gal / syd. h. Outside perimeter shall be compacted as soon as possible to ensure thermal bonding. Compact new paving with the specified roller to the full depth of the heated patch. Compacted surface shall be smooth in texture and shall have positive drainage matching the slope of the existing adjacent pavement. i. Any potholes within the patched area shall be cleaned, sides dressed to vertical, overfilled with new bituminous material, and compacted to match existing surface prior to application of infrared heat. j. Locations for infrared patches will be determined after award by the Owner. k. For a four inch patch depth: i. Heat pavement to a two inch depth and etch the repair area outline as detailed above. Remove all old bituminous material to a depth of two inches. ii. Heat and patch an additional two inch depth as detailed above. Do not compact. Add new bituminous material to fill the patch area. iii. Reshape patched area by hand with rake and lute to match grade of existing adjacent pavement. After reshaping, reapply rejuvenating agent at a rate of 0.10 to 0.20 gal I syd. iv. Outside perimeter shall be compacted as soon as possible to ensure thermal bonding. Compact new paving with the specified roller to the full depth of the heated patch. Compacted surface shall be smooth in texture and shall have positive drainage matching the slope of the existing adjacent pavement. 4. Method of Measurement & Basis of Payment: a. Payment for infrared patching shall be made at the unit price set forth in the proposal for the specified depth of patch. b. Contractor is to provide unit price for an additional 2 inch depth of patching per 5 ft. x 7 ft. patch. 5. The item(s) will be paid for as specified in the proposal as follows: Patch, Infrared, 5 ft. by 7 ft. by 2 in. depth ...................EA Patch, Infrared, 5 ft, by 7 ft. additional 2 in. depth .......... EA XX. COMPOSITION OF BITUMINOUS MIXTURES A. Prevailing Specifications: 2024, INDOT Standard Specifications Section 402 B. Additions: 1. All material used shall be HMA Surface PG 64-28, with up to 25% RAP, no RAS and incorporating only limestone aggregate, at no additional cost to the owner. 2. The contractor shall submit a job mix formula for approval five (5) working days prior to the first patch being placed. The contractor will not be allowed to proceed with the placement of asphalt without an approved job mix formula- The contractor shall notify the city 46 hours prior to Version 311 5/2024 Page - 7 Public Works Quote Scanned with CamScanner