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A01 STEEL, STAINLESS STEEL AND RELATED ALLOYS A04 IRON CASTINGS A05 METALLIC-COATED IRON AND STEEL PRODUCTS B01 ELECTRICAL CONDUCTORS B05 COPPER AND COPPER ALLOYS B07 LIGHT METALS AND ALLOYS C01 CEMENT C04 VITRIFIED CLAY PIPE C07 LIME AND LIMESTONE C09 CONCRETE AND CONCRETE AGGREGATES C11 GYPSUM AND RELATED BUILDING MATERIALS AND SYSTEMS C12 MORTARS AND GROUTS FOR UNIT MASONRY C13 CONCRETE PIPE C14 GLASS AND GLASS PRODUCTS C15 MANUFACTURED MASONRY UNITS C16 THERMAL INSULATION C17 FIBER-REINFORCED CEMENT PRODUCTS C18 DIMENSION STONE C21 CERAMIC WHITEWARES AND RELATED PRODUCTS C24 BUILDING SEALS AND SEALANTS C27 PRECAST CONCRETE PRODUCTS D01 PAINT AND RELATED COATINGS, MATERIALS, AND APPLICATIONS D04 ROAD AND PAVING MATERIALS D07 WOOD D08 ROOFING AND WATERPROOFING D09 ELECTRICAL AND ELECTRONIC INSULATING MATERIALS D11 RUBBER D14 ADHESIVES D18 SOIL AND ROCK D20 PLASTICS D35 GEOSYNTHETICS E05 FIRE STANDARDS E06 PERFORMANCE OF BUILDINGS E33 BUILDING AND ENVIRONMENTAL ACOUSTICS E36 ACCREDITATION & CERTIFICATION E57 3D IMAGING SYSTEMS E60 SUSTAINABILITY F01 ELECTRONICS F06 RESILIENT FLOOR COVERINGS F13 PEDESTRIAN/WALKWAY SAFETY AND FOOTWEAR F16 FASTENERS F17 PLASTIC PIPING SYSTEMS F33 DETENTION AND CORRECTIONAL FACILITIES F36 TECHNOLOGY AND UNDERGROUND UTILITIES G03 WEATHERING AND DURABILITY A01 STEEL, STAINLESS STEEL AND RELATED ALLOYS A04 IRON CASTINGS A05 METALLIC-COATED IRON AND STEEL PRODUCTS A06 MAGNETIC PROPERTIES B01 ELECTRICAL CONDUCTORS B02 NONFERROUS METALS AND ALLOYS B05 COPPER AND COPPER ALLOYS B07 LIGHT METALS AND ALLOYS B08 METALLIC AND INORGANIC COATINGS B09 METAL POWDERS AND METAL POWDER PRODUCTS B10 REACTIVE AND REFRACTORY METALS AND ALLOYS C03 CHEMICAL-RESISTANT NONMETALLIC MATERIALS C08 REFRACTORIES C28 ADVANCED CERAMICS D01 PAINT AND RELATED COATINGS, MATERIALS, AND APPLICATIONS D20 PLASTICS D30 COMPOSITE MATERIALS E01 ANALYTICAL CHEMISTRY FOR METALS, ORES, AND RELATED MATERIALS E04 METALLOGRAPHY E07 NONDESTRUCTIVE TESTING E08 FATIGUE AND FRACTURE E12 COLOR AND APPEARANCE E13 MOLECULAR SPECTROSCOPY AND SEPARATION SCIENCE E28 MECHANICAL TESTING E29 PARTICLE AND SPRAY CHARACTERIZATION E37 THERMAL MEASUREMENTS E42 SURFACE ANALYSIS F01 ELECTRONICS F34 ROLLING ELEMENT BEARINGS F40 DECLARABLE SUBSTANCES IN MATERIALS F42 ADDITIVE MANUFACTURING TECHNOLOGIES G01 CORROSION OF METALS G03 WEATHERING AND DURABILITY A01 STEEL, STAINLESS STEEL AND RELATED ALLOYS C01 CEMENT C09 CONCRETE AND CONCRETE AGGREGATES D02 PETROLEUM PRODUCTS, LIQUID FUELS, AND LUBRICANTS D03 GASEOUS FUELS D04 ROAD AND PAVING MATERIALS D15 ENGINE COOLANTS AND RELATED FLUIDS D18 SOIL AND ROCK D24 CARBON BLACK D35 GEOSYNTHETICS E12 COLOR AND APPEARANCE E17 VEHICLE - PAVEMENT SYSTEMS E21 SPACE SIMULATION AND APPLICATIONS OF SPACE TECHNOLOGY E36 ACCREDITATION & CERTIFICATION E57 3D IMAGING SYSTEMS F03 GASKETS F07 AEROSPACE AND AIRCRAFT F09 TIRES F16 FASTENERS F25 SHIPS AND MARINE TECHNOLOGY F37 LIGHT SPORT AIRCRAFT F38 UNMANNED AIRCRAFT SYSTEMS F39 AIRCRAFT SYSTEMS F41 UNMANNED MARITIME VEHICLE SYSTEMS (UMVS) F44 GENERAL AVIATION AIRCRAFT F45 DRIVERLESS AUTOMATIC GUIDED INDUSTRIAL VEHICLES
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Seven-Wire Steel Prestressing Strand

Prestressing concrete has existed in the construction industry for more than 100 years, but without a repeatable and reproducible test capable of quantifying the bond performance of prestressing steel strands (commonly called PC strand). This test has now been developed in the form of A1081/A1081M, Test Method for Evaluating Bond of Seven-Wire Steel Prestressing Strand.

A1081/A1081M was developed by Subcommittee A01.05 on Steel Reinforcement, part of ASTM International Committee A01 on Steel, Stainless Steel and Related Alloys.

Prestressing concrete technology most commonly uses seven-wire prestressing steel strands, as described in A416/A416M, Specification for Steel Strand, Uncoated Seven-Wire for Prestressed Concrete.

PC strands impart compressive force to concrete structural members, enabling otherwise brittle concrete members to reliably span long distances. When PC strands are tensioned in forms prior to pouring the concrete, the tension in the strands must bond to the concrete sufficiently to cause the concrete member to be in a state of compression once the strands are released from the tensioning anchorages.

Bonding issues in the pre-tensioned segment of the prestressed concrete made evident the need for the bonding test described in A1081/A1081M.

“Prestressing concrete is a vital construction technology used throughout the world,” says Christopher Reeve, a metallurgist with Insteel Wire Products, and a member of Committee A01. “PC strand producers need the test covered in A1081/A1081M to be able to evaluate the bond characteristics of their product as a quality control/quality assurance checkpoint in their manufacturing processes.”

In addition, Reeve notes, PC strand users need such a test to be able to qualify potential PC strand suppliers and monitor existing suppliers.

A01.05 invites interested parties to participate in its standards developing activities. Due to the limited number of facilities currently available to perform the test, A01.05 is particularly interested in identifying laboratories that are willing to perform it.

To purchase ASTM standards, visit www.astm.org and search by the standard designation, or contact ASTM Sales (phone: 877-909-ASTM; sales@astm.org).

CONTACT Technical Information: Christopher F. Reeve, Insteel Wire Products • Gallatin, Tenn. • Phone: 615-451-6330, ext. 2762 | ASTM Staff: Kevin Shanahan • Phone: 610-832-9737 | Upcoming Meeting: May 20-23 • May Committee Week • Indianapolis, Ind.

This article appears in the issue of Standardization News.