ISO 21022:2018

Test method for fibre-reinforced cementitious composites — Load-deflection curve using circular plates

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.

Méthode d'essai des composites à base de ciment renforcés par des fibres — Courbe de charge-déformation utilisant des plaques circulaires

General Information

• Status: Published
• Publication Date: 26-Nov-2018
• ICS: 83.120 - Reinforced plastics
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: ISO/TC 71/SC 6 - Non-traditional reinforcing materials for concrete structures
• Drafting Committee: ISO/TC 71/SC 6/WG 2 - Testing methods for fibre-reinforced cementitious composites
• Current Stage: 9060 - Close of review
• Start Date: 04-Jun-2029

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 21022
First edition
2018-11
Test method for fibre-reinforced
cementitious composites — Load-
deflection curve using circular plates
Méthode d'essai des composites à base de ciment renforcés par
des fibres — Courbe de charge-déformation utilisant des plaques
circulaires
Reference number
ISO 21022:2018(E)
©
ISO 2018

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ISO 21022:2018(E)

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ii © ISO 2018 – All rights reserved

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ISO 21022:2018(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative reference . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Test specimens. 3
5.1 Geometry . 3
5.2 Fabrication of specimens . 4
6 Testing machine and measuring devices. 5
6.1 Testing machine . 5
6.2 Loading fixtures for concentric ring testing . 6
6.2.1 General. 6
6.2.2 Loading and support rings . 6
6.2.3 Compliant layer and friction elimination. 6
6.3 Alignment . 7
6.4 Measuring device for loads . 7
6.5 Measuring device for deflection . 7
6.6 Data acquisition. 8
7 Test procedure .
...