Performance of concrete joint sealants in hot climates

619195Final reportPDFResearch PaperFHWA-AZ-7904NTIS-PB92125814HPR-PL-1(33) Item 114Test sectionsJoint sealingJoint sealersPavement jointsPerformance evaluationsArizonaArizona. Dept. of TransportationMcCullagh, Frank R.Wolfe, Timothy W.D'Souza, MelvillArizona. Dept. of TransportationUnited States. Federal Highway AdministrationNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and PerformanceNTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsUS Transportation CollectionA research project was initiated in 1979 on project IR-17-1(126) to compare and evaluate several joint sealants. In 1982 another test section on project F 028-1-506 was established to evaluate several other sealants. This report documents the placement and performance of these sealants, and presents recommendations for sealant material in hot climates. The 1979 project is located on the northbound lanes of the Black Canyon Freeway, in Phoenix, between the Northern Avenue underpass and the Northern Avenue northbound on-ramp. The test section is approximately 1500 ft long and includes three lanes of PCCP in each direction. A total of five products were evaluated on the Black Canyon Freeway: Dow Corning 888, Superseal 444, Overflex-MS2, ARCO III, and ADOT's own formula of MC250 with rubber. The second experimental project was initiated in October 1982 and is located on both the eastbound and westbound lanes of the Superstition Freeway between Gilbert Road and Lindsey Road in Mesa, Arizona. Four products were evaluated on the Superstition Freeway: General Electric's low modulus silicone SCS 4403, Tremco's THC-900 and Kitimine, and Superseal 444. Based on these two test sections it was found that if a silicone sealant is placed properly it will perform better than the PVC coal tar, asphalt-rubber, and polyurethane products that were tested. /Abstract from report summary page