Sources: American Concrete Institute, Farmington Hills, Mich.; CP staff
ACI’s newest certification program tests individuals’ technical knowledge on self-consolidating concrete mixes and ability to correctly perform five ASTM Standard Test Methods: C1610, Static Segregation of SCC Using Column Technique; C1611, Slump Flow of SCC; C1621, Passing Ability of SCC by J-Ring; C1712, Rapid Assessment of Static Segregation Resistance of SCC Using Penetration Test; and, C175, Fabrication of a Test Specimen with SCC. The Self-Consolidating Concrete Testing Technician certification program consists of written and performance exams; valid for five years, it is offered through ACI’s global network of 120-plus sponsoring groups in local practitioner communities.
Sources: Missouri University of Science & Technology (Missouri S&T), Rolla
The committee overseeing the 6th North American Conference on Design and Use of Self-Consolidating Concrete (SCC 2016), May 15-18, 2016, in Washington, D.C., is reviewing abstracts for candidate papers and presentations through July 31. It invites engineers, architects, public works officials, material suppliers, researchers, academics, students, contractors, and concrete industry professionals to share their research, experiences and accomplishments in advancing SCC production and practice by submitting abstracts via the conference portal, www.scc2016.com.
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.
Lafarge North America is playing a major role in the construction of a 4,800-ft., two-lane tunnel under the Elizabeth River in Hampton Roads, Va. Adjacent to the existing U.S. 58 Midtown Tunnel, the West Midtown Tunnel will double traffic capacity between the cities of Norfolk and Portsmouth, helping to alleviate congestion while separating tightly confined eastbound and westbound vehicles.