460SECTION 507 – PCCP RESTORATION

507.01 Description

This work shall consist of cleaning and sealing of joints and cracks, patching, profiling, underseal, and retrofit load transfer in accordance with 105.03. MATERIALS

507.02 Materials

Materials shall be in acco rdance with the following: 10 Asphalt Binder, PG 64-22 ........................................... 902.01(a) Dowel Bars .................................................................. 910.01(b)10 Fine Aggregates, Size No. 23 or 24 ............................. 904.02 Joint Sealing Materials ................................................ 906.02 Rapid Setting Patc h Materials ..................................... 901.07 Dowel bars and dowel bar assemblies shall be in accordance with 503.04. CONSTRUCTION REQUIREMENTS 20

507.03 Cracks

Sealing and filling operations shall not be conducted on a wet surface, when the ambient temperature is below 40°F, or when other unsuitable conditions exist, unless approved by the Engineer.

507.06 Profiling Profiling consists of the diamond grinding of the pavement. The grinding shall be completed by mechanical gr inding equipment in accordance with 508.08(c). Grinding 110

shall be completed in a longitudinal direc tion and shall begin and end at lines normal to the pavement centerline in any ground section. The operation shall be coordinated such that the slurry or residue materials are continuously removed from the pavement. The slurry shall not encroach into adjacent pavement lane s carrying traffic, or flow into gutters or other drainage facilities and shall be immediately and directly deposited into a tanker truck and removed from the jobsite. Final disposal of the material shall be in accordance with 104.07 and 203.08. Pa vement smoothness will be measured and adjusted in accordance with 501.25 and 501.28(d) after the cracks are routed, cleaned, and sealed in accordance with 507.03 and joints are sawed, cleaned, and resealed in accordance with 507.04. 120

507.07 Undersealing Undersealing shall be in accordance with 612.

507.08 Retrofit Load Transfer for PCCP Retrofit load transfer consists of diamond saw slot cutting and placing dowel bar assemblies in the PCCP, parallel to the centerline of the roadway without damaging adjacent PCCP. The diamond-sawed slot sha ll be cut using two diamond saw blades

per slot to cut the edges of the slot. The PCC within the slot and the burrs and bumps remaining in the base of the slots after cutting shall be removed with hand tools, or 130 mechanical chipping hammers not to exceed a nominal 15 lb in weight and shall be operated at a maximum angle of 45° from the pavement surface. All surfaces of the slots shall be thoroughly cleaned by sand blasting and all cracks in the slots shall be sealed with a silicone sealer. The slots shall be cleaned and blown dry with compressed air. Dowel bar assemblies shall be as shown on the plans. Prior to placement, the 507.05 463 assemblies shall be coated with a bond breaking material and placed on non-metallic supports in the slots. Dowel bars sha ll be parallel to the pavement surface. 140 Rapid setting patch material shall be mi xed and cured in accordance with the manufacturer’s recommendations. The mate rial shall be placed in the slots and troweled to match existing adjoining PCCP. Excess material removed during placing and troweling shall not be reused. Transverse contraction joints with retrofitted load transfers shall be sawed for the full lane width and sealed in accordance with 503.03(a) except the joint shall be cut in one operation. Transverse random cracks with retrofitted load transfer slots shall be routed and sealed for the full lane width in accordance with 503.05. 150 PCCP damaged outside the area of the slots due to the Contractor’s operations shall be repaired in an acceptable manner or replaced.

507.09 Method of Measurement

Routing and sealing of cracks, filling of cracks, sawing and sealing of joints, and filling of joints will be measured by the linear foot, complete in place. Retrofit load transfer will be measured by each dowel bar assembly installed, complete in place. PCCP patching will be measured in accordance with 506.13. PCCP joint repair will be measured in accordance with 509.18. Pr ofiling, regardless of depth, will be 160 measured by the square yard. Asphalt material and drilled holes for undersealing will be measured in accordance with 612.07. Construction activities for the cutting, cleaning of the PCCP, dowel bars, dowel bar supports, dowel bar end caps, foam core board, patching material and all other incidentals will not be measured. Routing of cracks or sawing of joints will not be measured. Routing and sealing of transverse random cracks at retrofitte d load transfer assemblies will not be measured. 170 Temporary traffic control measures for routing, sealing or filling of cracks or sawing, sealing, or filling of joints, and profiling will be measured in accordance with 801.17.

507.10 Basis of Payment

Routing and sealing of cracks, filling of cracks, sawing and sealing of joints, and filling of joints will be paid for by the linear foot, complete in place. The accepted quantities of retrofit load transfer will be paid for at the contract unit price per each assembly installed, complete in place. PCCP patching will be paid for in accordance 180 with 506.14. PCCP joint repair will be paid for in accordance with 509.19. Profiling will be paid for by the square yard. Undersealing and drilled holes will be paid for in accordance with 612.08. 507.10 464 The cost of temporary traffic control meas ures will be paid for in accordance with 801.18. Payment will be made under: Pay Item Pay Unit Symbol 190 Cracks in PC CP, Filled .............................................................. LFT Cracks in PCCP, Rout and Seal ................................................. LFT Joints in PC CP, Filled................................................................ LFT Joints in PCCP, Saw and Seal ................................................... LFT Profiling PCCP .......................................................................... SYS Retrofit Load Transfer ............................................................... EACH The cost of cutting of slots, cleaning, dowel bars, dowel bar supports, dowel bar end caps, foam board, mortar, and curing materials shall be included in the cost of the 200 pay item, retrofit load transfer. The cost of cleaning, sealing materials, and all incidentals shall be included in the cost of the pay item cracks in PCCP, filled or joints in PCCP, filled. The cost of routing, cleaning, sealing materials, and all incidentals shall be included in the cost of the pay item cracks in PCCP, rout and seal. The cost of sawing, cleaning, sealing materials, and all incidental s shall be included in the cost of the pay item joints in PCCP, saw and seal. The cost of all grinding, diamond cutting heads, and cleaning of the pavement, shall be included in the cost of the pay item for profiling.