CONCRETE JOINT SEALING 415.03 Include the cost of placing concrete pavements, including relevant labor and material (except the PCC), and the cost of reinforcing steel, load transfer devices, joint fillers, and joint sealants in the contract unit price for the relevant “Placement” pay items. The Department will not pay f or substitutions of high early -strength concrete for standard PCC. Steel, concrete, and materials needed for approach slab construction is to be included in the contract unit price for P.C. Railroad Approach Slabs . Steel, concrete, and other materials needed for joint construction is to be included in the contract unit price for Terminal Joints . Steel, concrete, and other materials needed for slab construction is to be included in the contract unit price for Terminal Joint Sleeper Slabs . The Department considers the cost of coring and filling core holes to be included in the contract unit price for the relevant portland cement concrete pavement pay items. The Department will pay adjusted prices for deficient units of pavement in accordance with Subsection 414.04.R, “Acceptance of Pavement.”
415.01 Description
This work consists of sawing, cleaning, and sealing joints in existing portland cement concrete pavement.
415.02 Materials
Provide materials in accordance with Subsection 701.08, “Joint Fillers an d Sealer.”
415.03 Equipment
Provide the following equipment:
A.Concrete Saw Provide concrete saws capable of sawing concrete joints to the dimensions shown on the Plans.
B.High -Pressure Water Pumping System Provide high -pressure w ater pumping systems capable of flushing concrete slurry from sawed joints.
C.Sand Blasting Unit Provide compressed air sand blasting units capable of cleaning joint surfaces as specified. Ensure the units include traps to remove free water and oil from the compressed air.
415.04 Concrete Joint Sealing
D.Air Compressor Provide air compressors capable of delivering compressed air with a pressure of at least 90 psi [620 kPa]. Ensure the compressors include traps to remove free water and oil from the compressed air.
E.Extrusion Pump Provide air -powered extrusion pumps to apply joint sealer. Ensure the pump output is capable of delivering the volume of the joint sealer to the joint as specified.
F.Injection Tool Provide a mechanical injection device to insert the sealer into the joint .
G.Joint Sealer Kettle Provide a double -bottom oil -bath indirect -flame type kettle if the joint sealant requires heating . Ensure the kettle is capable of mixing, heating, delivering, and maintaining the specified temperature.
415.04 Construction Methods
A.Sawing Joints Saw the joints to the dimensions shown on the Plans. Produce a joint of uniform width with cut faces on both sides along its full length.
B.Flushing Joints Remove the slurry from the joint area after sawing by flushing it with a high -pressure water system and other necessary equipment.
C.Cleaning Joint Faces
1.General Clean the sawed faces of the joints of foreign material before installing the joint sealer or filler Do not blow -dry the joints with compressed air or use portable han d saws to clean joint faces.
2.Sandblasting Sandblast joint faces after they dry. Attach the sandblaster nozzle to a mechanical aiming device to direct the sandblast at a 45° angle and maintain sandblasting at less than 2 in [50 mm] from the joint faces . Blow out the joints after sandblasting using filtered (oil and moisture free) compressed air at least 90 psi [620 kPa] and 120 ft³/min [3.4 m³/min]. Use a blow tube that fits into the joint. Repeat the sandblasting and blowing until no residual dust or coating remains in the joint.
3.Joint Contamination Clean the joints of any contaminates (due to traffic or weather) before sealing joints . CONCRETE JOINT SEALING 415.05
D.Backer Rod Install a backer rod before applying sealant if indicated in the plans or recommended by the sealan t manufacturer. Use a backer rod of the type recommended by the sealant material manufacturer. Install backer rod to the dimensions shown on the Plans.
E.Sealing Joints Clean and seal joints on the same day.
1.Approval of Joints for Sealing The Depart ment’s inspectors will examine joints prepared for sealing. The Resident Engineer will not approve joints for sealing if the joints are contaminated or wet.
2.Installation of Joint Sealers and Fillers The Resident Engineer may require that a representat ive of the joint filler manufacturer, joint sealer manufacturer, or both be on the job site at the beginning of the joint -sealing. The representative shall demonstrate the manufacturer’s installation standards.
3.Application of Joint Sealers Apply the j oint sealer using a Resident Engineer approved mechanical injection tool. Apply the joint sealer when the joint temperature is above 40°F [4°C] and joints are clean and dry. Inject sealers into the joint. Ensure that the sealers bond to the joint face sur faces. For surfaces of joint sealers that require tooling, use an approved mechanical device to make a concave surface from ¼ in to ½ in [6 mm to 12 mm] below the pavement surface. Complete the tooling before a skin forms on the surface of the sealer. D o not use soap or oil as a tooling aid. Tooling is not required for self -leveling joint sealers
4.Bonding Failures Repair sealants that fail to bond to sawn concrete joint surfaces, at no additional cost to the Department.
F.Traffic Ensure the freshly applied joint sealant is no longer sticky before allowing traffic on it.
415.05 Method of Measuremen T
The Resident Engineer will measure the length of concrete joint sealing after the joint sealant is in place.
416.02 Dowel Bar Retrofit
415.06 Basis of Payment
The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit: CONCRETE JOINT SEALING Linear Foot [Meter] SECTION 416 DOWEL BAR RETROFIT
416.01 Description
This work consists of restoring load transfer in existing portland cement concrete (PCC) pavement by installing epoxy coated dowel bars across transverse joints or cracks.
416.02 Materials
A.Dowel Bars Provide epoxy -coated dowel bars in accordance with Subsection 723.08, “Epoxy Coated Reinforcement Bars,” of the dimensions shown on the Plans. Provide tight -fitting, nonmetallic end caps that allow the bar to move ¼ in [6 mm] at each end.
B.Foam Core Board Provide foam core board ¼ in [6.25 mm] thick, constructed of closed cell foam, and faced with poster board material on each side.
C.Dowel Bar Chairs Provide nonmetallic dowel bar chairs to keep the dowel bars from moving during concrete placement. Place dowel bar chairs a t the locations shown on the Plans, within the vertical and horizontal tolerances.
D.Portland Cement Concrete Patching Material Provide PCC patching material to backfill retrofit slots in accordance with Section 701.16 . Mix, place, and cure PCC patching material in accordance with the manufacturer’s recommendations. The PCC patching material may be extended by using aggregate in accordance with Subsection 701.05, “Fine Aggregate,” and Subsection 701.06, “Coarse Aggregate, ” excluding the gradation requirements. Provide and use a PCC mix design for the patching material (including additives) that develops a compressive strength of at least 4,000 psi [27.6 MPa] in 6 hr. Provide curing compound in accordance with Subsection 701.07, “Curing Agents.”
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 291–293 of 935.