SECTION 563: POLYMER BRIDGE JOINT SEALS
563.1 Description
This Work consists of providi ng and installing polymer Bridge j oint seals consisting of a rapid-curing silicone or polyure thane sealing element. The pol ymer joint sealant system may also be used at concrete element to concrete element intersecti ons when specified by the Contract Documents.
563.2 Materials
563.2.1 General
The Contractor shall select sealing Material from the Departmen t’s Approved Products List for polymer Bridge joint seals.
563.2.2 Silicone Sealing Element
If using a silicone sealing element, the Contractor shall provi de a two-part, rapid-curing, self-leveling, cold-applied silicone polymer Material that cure s to a low-modulus rubber-like Material in accordance with Table 563.2.2:1, “Silicone Sealant Requirements.” The Contractor shall deliver each sealing compound lot or batch to the Project in the original sealed container. The Contractor shall indicate the m anufacturer’s name, batch and lot number on each container. Table 563.2.2:1 Silicone Sealant Requirements Property Requirement Tack-free time, 77 °F 30–60 min Nonvolatile content, minimum 93% Tensile strength and 24 h extension test — Initial, 5-Day cure, 77 °F 4–29 psi After water immersion 4–29 psi After heat aging, 4–29 psi After cycling, –20 °F, 50%, 3 cycles 4–29 psi 24 h extension (all specimens)a P a s s aAfter 24 h, no evidence of crack s, separation, or other opening that at any point is over 1/8 inch deep in the sealant or between the sealant and ba ckup blocks.
563.2.3 Polyurethane Sealing Element
If using a polyurethane sealing element, the Contractor shall p rovide a two-part joint sealant that cures quickly at ambient temperatures to form a fl exible, resilient, tear-resistant rubber. The Contractor shall provide polyurethane sealant in a ccordance with Table
563.2 3:1, “Polyurethane Sealing Requirements.”
The Contractor shall deliver each sealing Material lot or batch to the Project in the original sealed container. The Contractor shall indicate the manufactur er’s name and batch and lot number on each container. Polyurethane Sealing Requirements Property ASTM Requirement Bond @ -20 °F, 50% extension (1/2 inch) Non-immersed D 5329 Pass 3 cycles Water-immersed D 5329 Pass 3 cycles Tensile adhesion, minimum D 412 800% Penetration @ -13 °F D 5329 5/16 inch @ 0 °F D 5329 1/16 inch Flow 5 h @ 200 °F D 5329 0
563.2.4 Backer Rods
The Contractor shall provide backer rods in accordance with the sealant manufacturer’s recommendations.
563.3 Construction Requirements
563.3.1 Technical Representative
When installing Bridge joint sealants, the Contractor shall hav e the manufacturer’s technical representative on site for the initial joint installa tion to advise the construction personnel and ensure a satisfactory joint installation. If the Contractor can show proof of satisfactory past experience in stalling at least ten (10) joint s or 300 ft of joints of the same Material, whichever is larger , the Project Manager may waive th is requirement.
563.3.2 Manufacturer’s Instructions
The Contractor shall provide a complete set of written joint in stallation instructions to the Project Manager at least 14 Days before installing the joints.
563.3.3 Joint Preparation
The Contractor shall prepare the joint per the manufacturer’s r ecommendations.
563.3.4 Inspection Before Installation
The Contractor shall inspect joints for proper depth, width, al ignment, and preparation, and obtain Project Manager approval before installing the seala nt Material.
563.3.5 Application of Sealing Element
The Contractor shall install a backer rod at least 25% larger i n diameter than the joint opening, or a diameter specified by the manufacturer, to the sp ecified depth. Before applying sealant, the Contractor shall prime the substrate surfaces in a ccordance with the sealant manufacturer Specifications. The Contractor shall place sealant when the air and substrate t emperatures are from 45 °F to 80 °F and maintain at or above 45 °F for at least four (4) h. The Contractor shall apply sealant in accordance with the manuf acturer's Section 563: Polymer Bridge Joint Seals Page 579 recommendations, using an approved applicator.
563.3.6 Traffic
The Contractor shall not allow traffic on newly installed silic one or polyurethane sealing elements without Project Manager approval. Silicone or polyure thane sealants are normally ready for traffic upon removal of the traffic control devices.
563.4 Method of Measurement
Polymer Bridge joint seals will be measured by the linear foot .
563.5 Basis of Payment
Pay Item Pay Unit Polymer Bridge Joint Seals Linear Foot
563.5.1 Work Included In Payment
The Department will consider as included in the payment for th e pay item(s) listed in this section and will not measure or pay separately for the followin g Work: 1. Polymer bridge joint seal system; 2. Including material, labor, C ertificate of Compliance; 3. All other costs associated wi th providing and installing of the joint systems; and 4. Technical representative unless waived by Project Manager. Section 564: Preformed Closed Cell Foam Bridge Joint Seals Page 580