ASTM A881
Full Name
ASTM A881 – Standard Specification for Steel Wire, Indented, Low-Relaxation for Prestressed Concrete
Scope
ASTM A881 is a standard specification that outlines the requirements for indented, low-relaxation steel wire used in prestressed concrete applications. This type of wire is characterized by its high tensile strength, low relaxation properties, and a distinctive indented surface. The indented surface enhances the bond between the wire and the concrete, improving the transfer of stress and preventing slippage.
Key requirements specified in ASTM A881 include:
- Tensile strength: the wire must meet minimum tensile strength requirements, which vary depending on the wire diameter and grade.
- Relaxation: the wire must exhibit low relaxation properties, meaning it maintains a high percentage of its initial stress over time.
- Indentation: the wire must have a specific indentation pattern to ensure proper bonding with the concrete.
- Chemical composition: the wire must meet specified limits for elements such as carbon, manganese, phosphorus, sulfur, and silicon.
- Diameter: the wire is available in various diameters to suit different prestressing applications.
ASTM A881 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM A881 standard. By partnering with us, you can be confident in the quality and performance of your prestressed concrete components.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
steel wire; indented; low-relaxation; prestressed concrete; tensile strength; relaxation; indentation; chemical composition; diameter; bond; stress transfer; slippage; carbon; manganese; phosphorus; sulfur; silicon