ASTM A820/A820M-22

Anotace textu normy ASTM A820/A820M-22 :

This specification covers steel fibers intended for use in fiber-reinforced concrete. The fibers shall be straight or deformed and of Types I (cold-drawn wire), II (cut sheet), III (melt-extracted), IV (mill cut), and V ( modified cold-drawn wire). Tensile and bend tests of randomly-selected finished fibers shall be performed. Measurement of dimensions shall be performed and values should conform to permissible variations of length, nominal length, diameter, equivalent diameter, aspect ratio, and nominal aspect ratio. Guidelines for inspection, rejection, rehearing, certification, and packaging are also given.


Keywords:
acceptance testing, classification, fiber-reinforced concrete, steel fibers, tensile strength, testing procedures,, ICS Number Code 77.140.15 (Steels for reinforcement of concrete)