3721Preformed Elastomeric Compression Joint Seals for Concrete

3721.1SCOPE

Provide preformed polychloroprene elastomeric joint seals for use in sealing joints in concrete pavements, Bridges, and other Structures.

3721.2REQUIREMENTS

A Composition and Manufacture Provide joint seals meeting the requirements of ASTM D2628, Standard Specification for Preformed Polychloroprene Elastomeric Joint Seals for Concrete Pavements , and as specified in this section. Provide seals that are preformed and manufactured from a vulcanized elastomeric compound using polymerized chloroprene as the only polymer. B Size and Shape Provide preformed elastomeric compression joint seals in the size, shape, and dimensional tolerances of the seals as shown on the Plans or required by the Contract. The Contractor may use alternate shapes, if approved by the Engineer. C Physical Properties Unless the Contract requires otherwise, provide a 13/16 inch joint seal meeting the physical properties in accordance with ASTM D2628, Standard Specification for Preformed Polychloroprene Elastomeric Joint Seals for Concrete Pavements, and the following table: Table 3721.2-1 13/16 inch Joint Seal Compression-Deflection Requirements Property Requirement Force at 0.65 inches* ≥ 4 pounds/linear inch Force at 0.41 inches* ≤ 20 pounds/linear inch * Meeting the requirements of ASTM D2628, Standard Specification for Preformed Polychloroprene Elastomeric Joint Seals for Concrete Pavements , and the Compression-Deflection Test Method located in the Laboratory Manual. D Identification and Marking Provide joint seals marked with the following at intervals no greater than 4 feet:

For multiple die extrusion machines, identify the seal produced from each extrusion die as an individual sublot, in addition to the list above. Limit individual lot numbers or sublot numbers to 1 every 8 hour shift or every 6,000 feet, whichever results in the smallest lot size. Place a mark on the top surface of the seal at 1 foot intervals, to allow length measurements on each seal after installation. Provide containers to package joint seals for shipment marked with the following information:

E Lubricant-Adhesive Provide lubricant-adhesive meeting the requirements of ASTM D2835, Standard Specification for Lubricant for Installation of Preformed Compression Seals in Concrete Pavements , to install the seals.

3721.3SAMPLING AND TESTING

The Engineer in conjunction with the Materials Engineer may sample and test joint seals and lubricant adhesive Materials before or after delivery. The Engineer in conjunction with the Materials Engineer may reject an entire lot or sublot if a test result for that lot or sublot fails. A Sampling Provide samples at rates and sizes meeting the requirements of the Schedule for Materials Control or as required by the Contract. B Sample Preparation The Materials Engineer will prepare test specimens meeting the requirements of ASTM D2628, Standard Specification for Preformed Polychloroprene Elastomeric Joint Seals for Concrete Pavements , and in accordance with the Laboratory Manual. C Compression Deflection Test Perform compression deflection testing on two specimens in accordance with the Laboratory Manual.