SECTION 565: PREFORMED SILICONE-COATED FOAM JOINT SYSTEM
565.1 Description
This Work consists of providi ng and installing preformed, pre- compressed, self- expanding foam with silicone pre-coated surface. The foam is b onded in place with a structural epoxy adhesive. The s ilicone pre-coated surface is sealed to the bridge with silicone sealant. This system is referred to herein as “joint system.”
565.2 Materials
565.2.1 Joint System
The Contractor shall provide 100% waterproof pre-compressed po lymer impregnated open cell polyurethane foam topped with a silicone coating. Th e Contractor shall provide a joint system comprised of the following three (3) components: 1. Cellular polyurethane foam impregnated with 100% hydrophobic polymer, water based emulsion and factory coated with highway-grade, fuel resi stant silicone; 2. Field-applied epoxy adhesive primer; and 3. Field-injected silicone sealant. The Contractor shall provide a total system from a single manu facturer.
565.2.1 1 Open Cell Polyurethane
The Contractor shall provide a foam seal with the following pr operties: 1. Foam with a working range of 50% in tension and 50% in compr ession. Factory fabricate changes in plane and dir ection using factory fabricat ed watertight transition assemblies on inside and outside corners for 45 degrees and 90 degree bends; 2. Bleeding: none at 180 deg. F@ 50% compression for three (3) hrs; 3. UV Resistance, no changes 2000 hrs, in accordance with ASTM G155; and 4. Provide a polymer impregnation agent.
565.2.1 2 Epoxy Adhesive
The Contractor shall use 100% solids, two component moisture s ensitive modified epoxy adhesive which meets ASTM C-881.
565.2.1 3 Silicone Sealant
The Contractor shall use a one part, cold applied chemically c uring silicone joint sealant which meets ASTM D 5893. Silicone shall be fuel resistant.
565.3 CONSTRUCTION REQUIREMENTS 565.3.1 General
The Contractor shall be certified by the manufacturer for inst allation of the joint system. If the Contractor is not certified, the Contractor shall ensure th at a technical representative from the manufacturer is present for the duration of the joint syste m installation. Section 565: Preformed Silicone-Coated Foam Joint System Page 584 565.3.2 Installation The Contractor shall install the components of the joint syste m when the temperature is within the range specified by the manufacturer of each system c omponent. The Contractor shall store Materials in accordance with the manufacturer’s req uirements. The Contractor shall install field-applied epoxy adhesive prim er and field-injected silicone sealant as directed by the manufacturer. Prior to installation , the Contractor shall measure the opening of the existing joint at different locations and comput e the mean opening. The Contractor shall furnish the seal joint topped with fuel resist ant silicone in a width greater than the mean measured joint extension which when compressed will fo rm bellow(s) as recommended by the manufacturer. The Contractor shall furnish a foam seal having a depth appropriate for the joint width as recommended by the manufactu rer. The Contractor shall prepare surfaces to receive the sealant b y grinding, sand blasting, and/or shot blasting concrete bond surfaces, or per the manufac turer’s recommendations. For concrete surfaces, the Contract or shall repair spalls, chips, i rregular or unsound joint surfaces to provide smooth joint surfaces in a manner approved by the Pr oject Manager. The Contractor shall blast clean steel surfaces in accordance with SSPC-SP 6, "Industrial Blast Cleaning." After preparing the surface, the Contractor shall n otify the Project Manager for inspection of the joint before installing the joint system. Th e Contractor shall ensure joint sides are dry of solvents or other c leaning agents prior to installat ion. At deck edges, the joint Material shall not extend horizontall y beyond the deck, but shall turn down and seal the deck edge in the vertical plane. The jo int Material shall extend one (1) inch below the bottom of the deck. When factory fabricated universal 90's are required, the Contr actor shall start installation with these members. The Contractor shall apply epoxy adhesive to the sides of the joint header as directed by the manufacturer. The Contractor shall u nwrap joint system and place in joint opening as directed by the manufacturer. The Contract or shall provide a minimum recess of ½ inch for joint sizes ½ – 1-1/4 inch and a minimum r ecess of ¾ inch for sizes 1-1/2 – four (4) inch. Prior to placing joint system in the joint op ening, the Contractor shall verify depth using a wooden block shaped in the form of a 'T.' Before the epoxy cures, the Contractor shall install a bead of silicone sealant between the foam and the silicone topping.
565.3.3 Acceptance Test Procedures
The Contractor shall perform a watertight integrity test of th e joint system if required by the Project Manager. The test shall be observed by the Project Manager. The test results shall be photographically recorded and transmitted to the Proje ct Manager. Unless otherwise directed by the manufacturer, the water integrity test shall be as follows: Wait a minimum of 72 hours after the joint is placed. The Contractor shall flood t h e j o i n t w i t h w a t e r . T h e Contractor shall visually verify that there are not any leaks o n the underside of the joint as observed by the Project Manager. Joints that leak will not be accepted. The Contractor shall repair leaky joints in accordance with the manufacturer's recom mendations.
565.4 Method of Measurement
The joint system will be measured by the linear foot from end to end along the joint centerline.
565.5 Basis of Payment
Pay Item Pay Unit Section 565: Preformed Silicone-Coated Foam Joint System Page 585 Preformed Silicone-Coated Foam Joint System Linear Foot
565.5.1 Work Included in Payment
The Department will consider as included in the payment for the joint system and will not measure or pay separately for the following Work: 1. All Material, labor and Certificate of Compliance; 2. All other costs associated wi th providing and installing of the joint system; and 3. Technical representative if required. Section 570: Pipe Culverts Page 586