ISO DIS 21022

Description / Abstract: This International Standard specifies a test method for evaluating flexural performance of fibrereinforced cementitious composites (FRCCs) using parameters derived from the load-deflection curve obtained by testing a circular plate supported on a concentric ring and loaded by another ring with a smaller diameter. The performance of FRCCs specimens tested by this method is characterized for biaxial properties.

This test method provides for the determination of first-cracking load and the corresponding stress. It also provides for determination of specimen toughness based on the area under the loaddeflection curve up to the deflections at the first-cracking and peak loads. For determining the toughness value, this test method is intended primarily for use with FRCCs that exhibit deflection hardening behaviour. The application of this test method to materials that exhibit deflection-softening behaviour is not recommended.