The Florida Department of Transportation has approved Keystone Retaining Wall Systems’ KeySystem II for use on state and federal highways under the agency. The system consists of Keystone Compac III units and TenCate Geosynthetics’ namesake Miragrid geogrids. Under FDOT Specification Section 548: Retaining Wall Systems, KeySystem II is approved as a “segmental block FDOT wall type 4A and 4B (permanent). The system is to be used with TenCate Miragrid 3XT, 5XT, 7XT, 8XT or 10XT only.”Read More
A refined self-consolidating concrete (SCC) mix was developed to achieve the high workability needed for faster concrete discharge and finish, and attain the Florida Department of Transportation six-hour strength requirement of 2,200 psi (15 MPa) for concrete slab replacements, report Jamshid Armaghani, Ph.D., P.E., Global Sustainable Solutions, Gainesville, Fla.; Kamal Tawfiq, Ph.D., P.E., and Steven Squillacote, FAMU-FSU College of Engineering, Tallahassee; and, Michael Bergin, P.E., State Materials Office, Florida DOT-Gainesville, in their 2015 TRB paper, Accelerating Slab Replacement Using Self-Consolidating Concrete.