for Highway Construction Page 448 of 715 SECTION 579 – BON D REINFORCING STEEL
579.01 Description.
Drill and bond reinforcing steel as specified using an epoxy -resin based bonding system.
579.02 Materials.
Provide adhesive as specified in 720.04. Use Type IV, Grade 3 bonding system classification. Meet AASHTO M 31, Grade 60 requirements for reinforcing steel . Submit certified test results for the proposed product for approval before use. The Department has verif ied and approved the following products meet the requirements of bond reinforcing steel :
1.Unitex® Pro -Poxy™ 300 from Dayton Superior.
2.Hilti HIT -RE 500® from Hilti, Inc.
3.Simpson Set Pac Epoxy from Simpson Strong- Tie Company, Inc. Other products will need to be approved before use. This list is for information only and other products may be submitted for approval. Time associated with testing and verifying additional product(s) meet the requirements is not compensable.
579.03 Construction.
Follow the manufacturer's written instructions regarding mixing, drill- hole diameter and depth, application, and curing temperatures and conditions. Size the holes to fully develop the deformed bar. Clean and clear the holes of debris before a dhesive placement . If necessary, adjust the reinforcing steel embedment depth specified to meet development length requirements of the bonded bar. Ensure the pullout strength of the bonded reinforcing steel exceeds the yield strength of the deformed bar. Adjustments to embedment depth will be at no additional cost to the Department.
579.04 Method of Measurement.
The Engineer will measure acceptably completed work as lump sum.
579.05 Basis of Payment .
The Department will pay for accepted quantities at the contract unit price as follows: Pay Item Pay Unit Bond Reinforcing Steel ........................................................................... Lump Sum for Highway Construction Page 449 of 715 SECTION 580 – REMOVING ASPHALT OVERLAY
580.01 Description.
Remove the existing asphalt overlay from the bridge deck using power -operated diamond- grinding machinery or hydro- demolition m ethods with Engineer approval. Use small, power -operated curb diamond cutting or curb diamond- grinding machinery at the curbs, drains, and armored joints where the power -operated diamond- grinding machinery cannot access.
580.02 Materials.
Not specified.
580.03 Construction Requirements.
Plug existing deck drains by Engineer -approved methods to prevent waste materials from the removal operations entering the drains and falling under the bridge. R emove asphalt from the bridge deck without damaging the existing deck drains, concrete parapets, concrete curbs, and metal railing. Repair damage caused by removal operations at no cost to the Department. Protect adjacent traffic from debris by means of an Engineer -approved positive barrier system. Prevent debris from entering waterways. The Engineer will designate a trial area for the Contractor to demonstrate the equipment, personnel, and methods of operat ion produce satisfactory results. Begin removal operations only after the Engineer accepts the trial area results. The Engineer will inspect the deck during and after completion of the removal process to determine the need for further removal or repair of damaged areas. Removed mat erials are the Contractor’s property and must be properly disposed of.
580.04 Method of Measurement.
The Engineer will measure acceptably completed work by the square yard of the deck surface.
580.05 Basis of Payment .
The Department will pay for accepted quantities at the contract unit price as follows: Pay Item Pay Unit Removal of Asphalt Overlay ................................................................... SY
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 484–484 of 768.