ASTM International’s A1094/A1094M, Specification for Continuous Hot-Dip Galvanized Steel Bars for Concrete Reinforcement details corrosion protection for zinc- or zinc alloy-coated rebar.
“Galvanizing is a proven and effective way to protect reinforcing bar from corrosion, as it provides both barrier and galvanic protection to the steel substrate, [and] increases the chloride threshold,” says GalvInfo Center Director Gary Dallin. In addition to protection, the unique fabrication properties of the bars A1094 covers will help minimize installation and long-term maintenance costs, he adds, underscoring the standard’s usefulness to precast concrete producers; state and federal agencies overseeing bridge and road infrastructure; engineering and contracting firms; manufacturers seeking to confirm product parameters meet specification.
A1094 was developed under ASTM Committee A01 on Steel, Stainless Steel and Related Alloys, which convenes next in Tampa, Fla., during November (16-19) Committee Week. Contacts: (technical) Gary Dallin, 905/315-7443, [email protected]; (staff liaison) Kevin Shanahan, 610/832.9737, [email protected].
GALVANIZER GROUP UPDATES LIFE-CYCLE COST CALCULATOR
The American Galvanizers Association relaunched the Life-Cycle Cost Calculator (LCCC) at lccc.galvanizeit.org while releasing a new publication, “Costs Less, Lasts Longer.” The former tool automates the calculation from ASTM A1068, Standard Practice for Life-Cycle Cost Analysis of Corrosion Protection Systems on Iron and Steel Products, using cost data from a paint manufacturer survey. Galvanizing cost data is derived from a 2014 AGA Industry Survey. The LCCC update includes the 2014 cost data, a new design template, and user-friendly functionality.
AGA launched the LCCC in 2007, updating the calculator in 2010 to include the option to evaluate duplex systems (hot-dip galvanizing and paint). It allows specifiers to compare either the initial and life-cycle costs of hot-dip galvanizing or a duplex system to various other corrosion protection coatings. Users input three simple forms of data about a particular project including size, service life expectancy, exposure atmosphere, inflation and interest; the calculator runs the ASTM A1068 equation and generates results in a customizable, printable format.
In conjunction with the LCCC update, AGA released “Costs Less, Lasts Longer,” which discusses the parameters of initial and life-cycle cost analyses, and provides four case studies. The LCCC was used in each to compare the hot-dip galvanized or duplex system to the paint system considered. In all four case studies, the life-cycle cost of utilizing hot-dip galvanizing is more efficient; in some conditions, galvanizing is more economical on an initial cost basis.