461Sealing Roadway and Bridge Joints and Cracks

461.1General Description

This work includes removing the existing sealant material (if applicable), cleaning the joint, and installing silicone sealant in the roadway and bridge joints specified on the plans. The plans will designate the: • Type of joint (transverse or longitudinal) • Location of joint (mainline, shoulder, ramps, acceleration/deceleration lanes) • Type of joint (roadway, bridge) to be resealed • Which type silicone to use (Type A, B, C, or D) The Engineer will determine the roadway and bridge cracks to be resealed. Unless otherwise specified on the plans, use Type A silicone for roadway joints and use Type D silicone for bridge joints. 461.1.01 Definitions General Provisions 101 through 150. 461.1.02 Related References

QPL 66 461.1.03 Submittals General Provisions 101 through 150.

461.2Materials

Ensure that materials meet the requirements of the following Specifications: Material Section Silicone Sealant and Bond Breakers 833.2.06 Epoxy Resin Adhesives 886 For a list of silicone joint sealant sources, please see QPL 66. Select and use bond breakers [backer rod (if required) or tape] according to Subsection 833.2.06.A.2, Bond Breakers 461.2.01 Delivery, Storage, and Handling General Provisions 101 through 150.

461.3Construction Requirements

461.3.01 Personnel General Provisions 101 through 150. 615 615 615 615 615 615 615

461.3.02 Equipment

Use air compressors equipped with traps to remove surplus water and oil in the compressed air. Do not use contaminated air. Ensure that the compressor can deliver compressed air at a continuous pressure of at least 90 psi (600 kPa). The Engineer may check the compressed air for contamination.

Apply silicone sealant by pumping only. Use a caulking gun with a cartridge for touch-up work or small applications only. Use a pump with sufficient capacity to deliver the necessary volume of silicone to completely fill the joint in a single pass. Ensure that the nozzle’s size and shape closely fits into the joint to fill the joint with sealant with enough force to prevent voids in the sealant and to force the sealant to contact the joint faces.

Use a caulking gun with cartridge for the following situations: • Touch up work. • Placing vertical runs of Type A silicone in a bridge deck joint when Type B, C, or D silicone is used in the horizontal runs. • Sealing voids and cracks with Type A silicone where Type B, C, or D silicone (which will be applied on top of the Type A silicone) might leak through. • Sealing small cracks in the concrete. 461.3.03 Preparation Before installing a bond breaker or sealant, ensure that the joint is clean and dry. Complete all cleaning, air blasting, or air drying. 461.3.04 Fabrication General Provisions 101 through 150. 461.3.05 Construction

Completely remove the existing sealant in the joints. Take care during removal and cleaning to prevent damaging or enlarging the existing width of the joint. Repair any damaged areas at no cost to the Department.

Determine if the joint depth will accommodate the required sealant thickness and bond breaker and provide the required recess below the riding surface. Consider that the backer rod is thicker after it is squeezed into the joint. If necessary, saw the existing joint deeper and wider to provide the joint depth and width specified on the plans.

Thoroughly clean the joint of all foreign material including oil, asphalt, curing compound, sealant adhesive, paint, rust, and existing sealant, if still present. Demonstrate to the Engineer that the proposed method of cleaning old sealant or foreign material from joints will not widen the joints by more than 0.040 in. (1 mm). The method shall not alter the joint profile (including rounding of the top corner) or alter the texture of the concrete riding surface. Do not use chemical agents to clean the joint. Ensure that the cleaning process produces a new, clean concrete face on the vertical faces of the joint. 616 616 616 616 616 616 616

Saw the transverse and longitudinal joints according to the specifications and plan details.

NOTE: Do not use a gang saw to make a completed cut in a single operation.

compound and allow it to fully cure before installing the joint sealant.

Immediately after sawing the joint do the following:

of water under pressure. Use other tools as necessary.

compressed air with a pressure of at least 90 psi (620 kPa) to blow out the joint and remove dust traces.

concrete riding surface texture. Do not clean the joint with chemical agents.

Select and use bond breakers [backer rod (if required) or tape] according to Section 833.2.06.A.2.

sealant, complete the cleaning, air blasting, or air drying.

Engineer, and according to Subsection 461.3.05.B. NOTE: The width of some bridge joints may require back-up material other than the typically shaped round backer rod.

into the joint. Use approved bond breaking tapes in place of backer rod in some applications. See plan details for various joint types.

Install the silicone sealant immediately after cleaning the joint or crack and installing the bond breaker. Keep the joint or crack clean and dry. If the joint or crack becomes contaminated, damp, or wet, remove the bond breaker if it has been installed. Clean and dry the joint or crack and install a new bond breaker before placing the sealant. Follow these guidelines when placing the sealant:

specified width and height of sealant in one pass. Use a nozzle with the proper size and shape to closely fit inside the joint. The sealant must be introduced inside the joint with enough pressure to prevent voids in the sealant and to force the sealant into contact with the joint faces. 617 617 617 617 617 617 617

silicone in a bridge deck joint when Type B, C, or D silicone is used), and to seal voids and cracks with Type A silicone where Type B, C, or D silicone might leak through. You may also use a caulking gun to seal small cracks in the concrete.

shown on the Plans. Apply sufficient force to the sealant in this tooling operation to force the sealant against the joint faces and to ensure proper wetting and bonding of the sealant to the joint faces. Type B, C, and D silicones are self-leveling and do not normally require tooling.

closes off gaps and voids where the silicone might leak through. To ensure that the gaps are closed use any of the following methods: • Stuff small pieces of backer-rod into the gaps and voids • Place a piece of bond breaking tape over the void • Use Type A silicone to seal the void. If using Type B, C, or D silicone and a backer-rod, ensure the backer rod is Type M. Do not use Type L backer-rod with Type B, C, and D silicone.

After sealing a joint or crack, immediately remove the surplus sealant or other residue on the pavement or structure surfaces.

Do not permit traffic on the sealed joints or cracks until: • The sealant is tack free. • The sealant has cured enough to resist displacement from slab movement or other causes. • Debris from traffic does not imbed into the sealant.

The following requirements apply to this work:

surface grinding for that day is completed, unless otherwise specified on the Plans. Seal joints on new pavement after the curing period. When the Plans call for resealing before specified grinding, increase the recess depth and joint depth by 1/4 to 3/8 in. (6 to 10 mm) to compensate for the depth of the pavement removed during the grinding operation.

Remove sawing residue or other contaminants.

install primer before the backup material.

Only reseal non-armored joints (one-sealant receptacle and concrete surfaces on joint faces), unless otherwise indicated on the plans. 618 618 618 618 618 618 618

461.3.06 Quality Acceptance If a sealed joint fails due to any of the following reasons, it will be rejected. • Adhesion or cohesion failure of joint material • Unsatisfactory or improper quality of work • Damage by operations or public traffic • Damage to the sealant from displacing because of slab movements or insufficient curing before opening to traffic Repair the joint to the Engineer’s satisfaction at no additional cost to the Department. 461.3.07 Contractor Warranty and Maintenance General Provisions 101 through 150.

461.4Measurement

When listed as a pay item in the proposal, joints and cracks sealed and resealed will be measured in linear feet (meters). No separate measurement and payment will be made unless a pay item for the work is included in the proposal. If no pay item is included in the proposal, include the cost of the joint sealing and resealing in the overall bid price submitted. No separate measurement or payment will be made for any saw cutting required to seal or reseal the joint.

461.4.01 Limits

General Provisions 101 through 150.

461.5Payment

When listed as a pay item in the Proposal, joints and cracks sealed or resealed will be paid for at the Contract Unit

Price bid per linear foot (meter). Payment is full compensation for furnishing materials, equipment, tools, labor, and

incidentals to complete the work.

Payment will be made under:

Item No. 461 Resealing roadway joints and cracks, type___ Per linear foot (meter)

Item No. 461 Resealing bridge joints, type___ Per linear foot (meter)

Item No. 461 Sealing roadway joints and cracks, type___ Per linear foot (meter)

Item No. 461 Sealing bridge joints, type___ Per linear foot (meter)

461.5.01 Adjustments

General Provisions 101 through 150.. 619 619 619 619 619 619 619