Article 1 — Description
Furnish and install bridge expansion joints .
Article 2 — Materials
Provide materials in accordance with the requirements of the following Items. Item 442, “Metal for Structures” DMS -6140 , “Polymer Concrete for Bridge Joint Systems” DMS -6310 , “Joint Sealants and Fillers” ASTM D5973 Use primers recommended by the manufacturer of the sealant when required. Provide backer rods that are circular and are 25% larger than the joint opening. Use backer rods compatible with the sealant that do not react with or bond to the sealant.
Article 3 — Constructi On
Place expansion joints to conform to the finished grade of the roadway surface. Set the joint opening at the dimension shown on the plans for 70°F, adjusted for the temperature at the time of installation. Place the seal for the full length of the joint for sealed joint openings and, when required, extend it into the parapet wall on the low side or sides of the bridge.
3.1 Sealed Expansion Joint (SEJ). Choose an approved joint system that conforms to the joint type and the
design requirements shown on the plans. Secure each side of the joint by welding it to the adjacent reinforcing steel or other attachments as approved. Remove any connection holding the joint halves together immediately after each joint half is secured in place. Install the neoprene seal as a continuous piece to form a watertight seal.
3.2 Armor Joint . Place steel armor plates as shown on the plans. Secure each side of the joint by welding it to
adjacent reinforcing steel or other attachments as approved. Remove any connection holding joint halv es together immediately after each joint half is secured in place. Seal the joint when specified. Abrasive blast clean the vertical faces of the steel plates where the sealant will be in contact to remove all visible rust, paint, mill scale, and other forms of contamination, leaving a white metal appearance. Clean the concrete in contact with the sealant by an approved method in conformance with the manufacturer’s specifications before placing sealant. After cleaning, air blast the joint to remove all dust. Place sealant in conformance with the manufacturer’s specifications and as shown on the plans. Repair damage to paint protection system above the seal when shown on the plans for steel armor plates to be painted.
3.3 Header -Type Expansion Joint . Meet with the manufacturer’s representative and the Engineer to discuss
the required installation procedures of the materials before beginning the work. Perform the work in conformance with the manufacturer’s printed instructions and as discussed in the meeting. Additionally, the Engineer may request the presence of the manufacturer’s representative for additional training if work personnel are not adequately following manufacturer’s installation directions. 701 3.3.1. Header . Provide an approved polymer concrete in accordance with DMS -6140 . Create the required void in the concrete surface or asphalt overlay to accept the header material as show n on the plans. Extend the depth of the void in the asphalt overlay to sound concrete. Remove any unsound steel or concrete and repair concrete in accordance with Item 429, “Concrete Structure Repair,” and Item 785, “Bridge Joint Repair or Replacement.” Use header material as repair material only when approved. Clean the voided region of all materials that could inhibit the bond between the header material and concrete or steel. Form the joint opening to the required width shown on the plans. Place materials once approved. Place material on a clean, sound, and dry base when the ambient temperature is at least 45°F and rising or as required by the manufacturer. Do not place material on wet substrate or when raining. Cure for the duration required by the manufacturer’s data sheets before opening to traffic. Tool or grind the upper corner of the header adjacent to the opening to a 1/4- in. radius.
3.3.2 Sealant . Provide an approved Class 1 or Class 7 joint sealant in accordance with DMS -6310
, unless otherwise shown on the plans. Clean the joint opening of forming material, existing seal, and other material that will inhibit the bond between the header material and the sealant. Abrasive blast clean surfaces in contact with the sealant. Place an approved backer rod and the sealant as shown on the plans and in conformance with the manufacturer’s specifications . Apply the primer, when required, at the specified rate and time interval before placing the sealant. Apply the sealant to dry joint surfaces unless otherwise recommended by the sealant manufacturer. Place primer and sealant when ambient temperature is rising and is between 55°F and 85°F to provide for adequate joint opening and compression of the sealant during curing. Tool any sealant material that is not self -leveling to force the sealant against the joint surfaces.
3.4 Foam -Type Joint Seal . Meet with the manufacturer’s representative and the Engineer to discuss the
required installation procedures for the materials before beginning the work. Perform the work in conformance with the manufacturer’s printed instructions and as discussed in the meeting. Additionally, the Engineer may request the presence of the manufacturer’s representative for additional training if work personnel are not adequately following the manufacturer’s installation directions. Measure all joint openings and size the width of the seal in conformance with the manufacturer’s spec ifications. Provide one of the systems shown on the plans with materials meeting the following: ultraviolet stable polymer- impregnated foam body, rated for ±50% contraction or expansion of joint opening, adhered to expansion joint surfaces with epoxy adhes ive, factory -attached traffic -grade silicone with minimum thickness of 0.07 in. on upper surface, compatible field- installed silicone caulk to attach silicone top to joint edges and for splicing, pre-compressed system for field installation, and a range of widths of joint seals to ensure the joint seal is in compression after installation is complete.
3.5 Type “A” Joint . Provide an approved Class 7 silicone joint sealant in accordance with DMS -6310
, unless otherwise shown on the plans. Clean the joint opening of forming material, existing seal, and other material that will inhibit bond between the header material and the sealant. Abrasive blast clean surfaces in contact with the sealant. Place an approved backer rod, pre- formed bituminous fiber material, and sealant as shown on the plans and in conformance with the manufacturer’s specifications. Apply the primer, when required, at the specified rate and time interval before applying the sealant. Apply the sealant to dry joint surfaces unless otherwise recommended by the sealant manufacturer. Place primer and sealant when ambient temperature is rising and is between 55°F and 85°F to provide for adequate joint opening and compression of the sealant during curing. Tool any sealant material that is not self -leveling to force the sealant against the joint surfaces. 702 4. MEASUREMENT SEJs, armor joints , foam -type joint seals, and Type “A” joints will b e measured by the foot. Header -type expansion joints will be measured by the cubic foot of header material and foot of sealant. Length measurement will be along the centerline of the joint at the surface of the roadway and up into the parapet. Calculate volume for header -type expansion joints using the length and width shown on the plans and the header depth measured in place. SEJs, armor joints , foam -type joint seals, and Type “A” joints are a plans quantity measurement Item. The quantity to be paid is the quantity shown in the proposal , unless modified by Article 9.2., “Plans Quantity Measurement.” Additional measurements or calculations will be made if adjustments of quantities are required.
Article 5 — Payment
The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Sealed Expansion Joint” of the size (minimum total movement capacity) and designation specified, “Armor Joint,” “Armor Joint (With Seal),” “Foam Seal,” “Type A,” and “Header- Type Expansion Joint.” Sealing the joint will be subsidiary to these items with the exception of the header -type expansion joint . This price is full compensation for furnishing and installing the joint systems, including steel , and for materials, tools, equipment, labor, and incidentals . For “Header -Type Expansion Joint,” header material will be paid for at the unit price bid for “Header -Type Expansion Joint ,” and the sealant will be paid for at the unit price bid for “Joint Sealant.” This price is full compensation for furnishing and installing the joint systems and for materials, tools, equipment, labor, and incidentals.