The American Concrete Institute introduced 2017-2018 officers and directors during The Concrete Convention and Exposition in Detroit, led by President Khaled Awad, chairman of Beirut-based material and geotechnical consultant ACTS; Vice President Randall Poston, senior principal with Pivot Engineers in Austin, Texas; and, Senior Vice President David Lange, University of Illinois professor of Civil Engineering.
Joining the ACI Board for three-year terms are H.R. Trey Hamilton, professor of Civil Engineering at the University of Florida Engineering School of Sustainable Infrastructure and Environment; Joe Hug, technical services manager for Monarch Cement Co., Humboldt, Kan.; William Klorman, founder of W.M. Klorman Construction Corp., Woodland Hills, Calif.; and, Tracy Marcotte, P.E., a King of Prussia, Pa.-based specialist in metallurgical and materials engineering.
ASTM International Committee A01 on Steel, Stainless Steel and Related Alloys has approved the inclusion of grades 310, 325, 340 product in A416/A416M, Specification for Low-Relaxation, Seven-Wire Steel Strand for Prestressed Concrete, representing a 15- to 25-percent increase in minimum tensile strength from existing grades. A new annex will reference the three grades.
“In the global engineering and construction industries, there is considerable interest in high-performance materials for use in concrete structures,” says Korea Testing Certification Senior Researcher Taejin Hwang, who chaired the task group revising A416. “For steel reinforcement, the term ‘high-performance’ encompasses several desired attributes including corrosion resistance, toughness, weldability and strength.” Higher strength strand joining A416 is manufactured in Asia, he adds, and being used in the construction of bridges, storage tanks, and other structures.