724BRIDGE EXPANSION JOINTS

724.01Description

This work shall consist of furnishing and placing bridge expansion joints of the type specified, in accordance with 105.03.

This work shall consist of the remova l and replacement of an existing bridge 10 expansion joint with a joint of the type specified, in accordance with 105.03.

This work shall consist of the replacem ent of the seal in an existing bridge expansion joint of the type specified in accordance with 105.03.

724.01

MATERIALS

724.02Materials

Materials shall be in acco rdance with the following: 20

Bridge Expansion Join t Type M .................................. 906.07(b) Bridge Expansion Jo int Type PCF .............................. 906.07(c) Bridge Expansion Jo int Type SS ................................. 906.07(a) Inorganic Zinc Primer.................................................. 909.02(a)1 Rapid Set Patching Materials ...................................... 901.07 Structural Steel ............................................................ 910.02

The joint manufacturer shall prepare a nd submit working drawings in accordance with 105.02. The working drawings shall include details of the assembly, manufacturer’s installation instructions, installation details for where changes in the joint direction are required, manufacturer’s specifications for all joint materials and adhesives, a statement certifying the compatibility of the joint material and the substrate, and joint setting data.

For joints constructed in phases, the joint width for the initial phase shall be established in accordance with the joint setting table. The joint width for each subsequent phase shall be equal to the field measurement of the joint constructed in 40 the initial phase taken at the time of the subsequent phase joint construction.

The joint assembly shall consist of one of the allowable alternates for this type of joint as shown on the plans. The strip seal shall be sized to accommodate a minimum of 4 in. of movement. The strip seal shall be furnished in one continuous length for the entire limits of the installed joint. The strip seal shall not be field-spliced.

The joint assembly shall be manufactured in accordance with the details shown 50 on the working drawings as prepared by th e manufacturer of the joint assembly. The strip seals shall be furnished in one continuous length for the entire limits of the installed joint. The strip seals shall not be field-spliced.

The joint seal shall be sized to accomm odate the anticipated thermal movement range shown on the plans. The nominal joint size shall meet or exceed the existing joint mean opening size at 60°F as shown on the plans.

CONSTRUCTION REQUIREMENTS 60

724.03General Requirements

All welding shall be in accordance with 711.32. All splice welds shall develop 724.03

full strength. All welds which come in contact with the strip seals shall be ground smooth. All metal surfaces in direct contact with the strip seal shall be cleaned and properly treated in accordance with the manufacturer’s recommendations to provide a high strength bond between the strip seal and mating metal surfaces. Lubricants and adhesives shall be used in accordance with the joint manufacturer’s recommendations. All excess lubricant and adhesive shall be removed before it has set. The strip seals shall be clean and free of foreign materials. 70

Final adjustment of the assembly shall be made as directed at the time of installation. All movements due to such factors as shrinkage, creep, and mid-slab deflection shall be accounted for prior to this final adjustment.

The existing joint and adj acent concrete shall be removed to the limits shown on the plans. Additional removal, as directed, may be required to encounter sound concrete adjacent to the join t area. The replacement joint shall be in accordance with the requirements contained herein for the specified type. Concrete shall be class C in 80 accordance with 702.

The existing seal shall be removed in its entirety. The new seal shall be installed in accordance with the requirements contained herein for the specified joint type.

Where an existing joint is to be replaced, the existing joint and adjacent concrete shall be removed to the limits shown on th e plans. Additional concrete removal to ensure sound concrete adjacent to the join t area shall be as directed. Patching of 90 adjacent concrete shall use bridge deck patching concrete or rapid setting patching materials.

The Contractor shall measure the existing opening perpendicular to the centerline of the joint to determine the installation opening. Using this information and movement and mean opening size from the plans, the manufacturer shall select a specific joint model for the size.

The joint area shall be cleaned as speci fied herein and in accordance with the manufacturer’s guidance. Existing surfaces that will be in contact with the new joint 100 shall be sandblasted and cleaned of all old joint seals, old materials or devices, bituminous material, dirt, grease, and all other deleterious material over the total area of the opening to receive the new joint in accordance with the manufacturer’s recommendations. All areas to be in contact with the new joint shall be sound, clean, dry, and frost free. The use of heat will not be allowed to dry the adjacent surfaces. Bridge deck patching concrete shall be cured a minimum of seven days and rapid setting patching materials shall be cured a minimum of three days prior to installing the joint. Shorter cure durations will be allowed if approved in writing by the joint and sealant manufacturer and shown on the working drawings. 724.03

The joint shall be adhered to the substrate with a field applied epoxy adhesive. Adhesives shall be used in accordance with the joint manufacturer’s recommendations. All excess adhesive shall be removed before it has set. The epoxy material shall be stored, mixed, and placed in accordance with the manufacturer’s recommendations.

Joints shall be inspected for proper depth, width, alignment, and preparation as shown on the plans. The joint shall be installed when the temperature is within the allowable range stated in the manufacturer’s instructions, but not less than 40°F. Final adjustment of the seal shall be made as directed at the time of installation. All 120 movement due to such factors as shrinka ge, creep and deflection shall be accounted for prior to this final adjustment.

Prior to the epoxy curing, the Contractor shall force the tip of the silicone sealant between the substrate and the joint, and inject a corner bead of silicone sealant along the entire length of the joint. The Contractor shall tool the silicone sealant to blend with the substrate and silicone coating of the joint.

724.04Method of Measurement

Bridge expansion joints will be measured by the linear foot along and parallel to 130 the plane of the finished joint surface. Replacement of existing bridge expansion joints will be measured by the linear foot along and parallel to the plane of the finished joint surface. Concrete removal and class C concrete required for the replacement of existing bridge expansion joints Type SS and Type M will not be measured for payment.

Patching of existing concrete adjacent to Type PCF joints as shown on the plans, and as required by the Engineer, will be measured by the square foot of actual surface area of patching. Individual areas of less than 1 sq ft in area will be considered as 1 sq ft. Areas greater than 1 sq ft will be recorded as the actual measurement of the repaired 140 area to the nearest 0.1 sq ft. Removal of the existing joint, removal of the concrete adjacent to the joint, epoxy adhesive, silicone sealant, and all other materials used in the installation of the Type PCF joint will not be measured for payment.

Sliding cover plates will not be measured for payment. Replacement of existing bridge expansion joint seals will be measured by the linear foot along and parallel to the plane of the finished seal installation.

724.05Basis of Payment

Bridge expansion joint will be paid for at the contract unit price per linear foot of 150 the type specified, complete in place. Repl acement of existing bridge expansion joint will be paid for at the contract unit price per linear foot for bridge expansion joint, of the type specified, replace, complete in place. Replacement of existing bridge expansion joint seals will be paid for at the contract unit price per linear foot for bridge expansion joint seal, of the joint type specified, replace. The cost of concrete for 724.05

patching bridge expansion joint areas adjacent to Type PCF joints as shown on the plans and as directed by the Engineer will be paid for at the contract unit price per square foot.

Payment will be made under: 160

Pay Item Pay Unit Symbol

Bridge Expansion Joint, ____ .................................................... LFT type Bridge Expansion Joint, ____, Replace ..................................... LFT type Bridge Expansion Join t Seal, ____, Replace ............................. LFT type Concrete for Patching Br idge Expansion Joint .......................... SFT 170

The cost of sliding cover plates shall be included in the cost of bridge expansion joint or bridge expansion joint, replace, as applicable. The cost of reinforcing bars, concrete removal, and class C concrete for the replacement of existing bridge expansion joint shall be included in the cost of bridge expansion joint, replace.

Areas where patching concrete for bridge expansion joints exceeds an average of 4 in. in depth will be paid for at a price calculated by means of multiplying the contract unit price for the respective item by the following factors:

than 4 in. but less than 6 in. ................................................ 1.25

than or equal to 6 in. but less than 8 in. .............................. 1.50

work shall be done as extra work. Payment will be made in accordance with 104.03.

The cost of existing joint removal, epoxy adhesive, silicone sealant, and all other materials shall be included in the cost of the Type PCF joint pay item.

The cost of removing the existing concrete, furnishing, hauling, placing all materials, preparing the surface, and all n ecessary incidentals shall be included in the pay items in this section.

The cost of replacing damaged reinforcement, supplemental reinforcing bars and mechanical anchors shall be included in the pay items in this section.

724.05