本文件规定了使用衍生参数评估纤维增强水泥基复合材料（FRCC）弯曲性能的试验方法。这些参数来自测试由同心环支撑并由另一个直径较小的环加载的圆形试样所获得的载荷-挠度曲线。通过该方法测试的FRCC的性能具有双轴特性。 本试验方法规定了首次开裂荷载和相应应力的测定。它还规定了根据载荷下的面积确定试样韧性- 挠度曲线，直至第一次开裂和峰值荷载时的挠度。为了确定韧性值，本试验方法主要用于表现出偏转硬化行为的FRCC。本试验方法不适用于具有挠曲软化特性的材料。

This document specifies a test method for evaluating flexural performance of fibre-reinforced cementitious composites (FRCCs) using derived parameters. These parameters are derived from the load-deflection curve obtained by testing a circular specimen supported on a concentric ring and loaded by another ring with a smaller diameter. The performance of FRCCs 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 the determination of specimen toughness based on the area under the load-deflection 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. This test method is not intended for materials that exhibit deflection-softening behaviour.