860 Page 524860 PREFORMED EXPANSION JOINT FILLER FOR CONCRETE
860.1REQUIREMENTS
Preformed expansion joint filler for concrete will conform to the requirements of AASHTO M 213, AASHTO M 153, AASHTO M 33, ASTM D7174, or ASTM D8139. 870 Page 525870 CONCRETE JOINT SEALER
870.1REQUIREMENTS
A.Hot Poured Elastic Joint Sealer: The sealant will conform to the requirements of ASTM D6690 Type IV or be on the Department’s Approved Products List for joint sealants for asphalt over long jointed concrete pavement. Hot poured elastic joint sealer meeting the requirements of ASTM D6690 Type IV will not weigh more than 9.35 pounds per gallon. Test methods will conform to ASTM D5329, except the fine aggregate used in preparing the concrete test blocks will conform to Section 800. The Contractor will furnish a Certificate of Compliance for hot poured elastic joint sealer not listed on the Department’s Approved Products List. B.Low Modulus Silicone Sealant: Low modulus silicone sealant will be furnished in a one-part silicone formulation. The sealant must be on the Department’s Approved Products List and must meet the following requirements: Test Limit Test Method Tack Free Time 20-75 minutes MILS 8802 Specific Gravity 1.010-1.515ASTM D792 (Method A) Durometer Hardness Type A: [Cured 7 days at 77°F ±3° and 45% to 55% R.H.]10-25 0°F ASTM D2240 Tensile Stress: [150% elongation, 7 days at 77°F ±3° and 45-55% R.H.]45 psi maximum ASTM D412 (Die C) Elongation: [7 day cure at 77°F ±3° and 45- 55% R.H.]1000% minimum ASTM D412 (Die C) Shelf Life6 month minimum from date of manufacture Ozone and Ultra Violet ResistanceNo chalking, cracking or bond loss after 5000 hours Movement Capability and Adhesion [ 7 day cure in air 77°F ±3°]No adhesive or cohesive failure, *1 all 3 specimens must exceed 500% extension at 0°F Bond to Concrete Mortar Concrete Briquettes [air cured 7 days at 77°F ±3°]50 psi minimum 0°F AASHTO T 132*2 *1Prepare the specimens using 1" x 2" x 3" concrete blocks made in accordance with ASTM D 5329, except the fine aggregate will conform to Section 800. A sawed face will be used for bond surface. Seal 2 inches of block leaving 1/2 inch on each end of specimen unsealed. The depth of sealant will be 3/8 inch and the width 1/2 inch. Subject the sealant to movement at a rate of 2 inches per minute until failure. *2Briquettes molded in accordance with AASHTO T 132 sawed in half and bonded with approximately 10 mils of sealant and tested using clips meeting AASHTO T 132. Briquettes will be dried to constant weight in oven 100°C ± 5°. They will be tested in tension at a loading rate of 0.3 inches per minute. The backer rod will be a non-moisture absorbing, closed cell, resilient material meeting the requirements of ASTM D5249 approximately 25% larger in diameter than the width of the joint to be sealed. The backer rod will be compatible with the sealant and no bond or reaction will occur between the rod and the sealant.