ISO 10406-3-2019 PDF

Full title and description

ISO 10406-3:2019 — Fibre-reinforced polymer (FRP) reinforcement of concrete — Test methods — Part 3: CFRP strips. This International Standard specifies test methods for unidirectional carbon fibre‑reinforced polymer (CFRP) strips used as externally bonded reinforcement on concrete substrates, including specimen preparation and tensile testing with bonded anchorage.

Abstract

This document specifies test methods applicable to unidirectional carbon fibre‑reinforced polymer (CFRP) strips as external‑bonded reinforcements on concrete. It applies to CFRP strips that consist of carbon fibre and thermoset resin, are manufactured by pultrusion, have a high carbon‑fibre fraction (typically >60 %) and a thickness up to about 3 mm. Tensile test specimens are cut from the strips along the strip axis and use bonded anchorage blocks at both ends for gripping.

General information

• Status: Published (confirmed)
• Publication date: 25 July 2019
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 83.120; 91.100.30
• Edition / version: Edition 1 (2019)
• Number of pages: 11

Scope

Specifies laboratory test methods for unidirectional CFRP strips used as externally bonded reinforcement on concrete elements. The standard covers material and dimensional applicability (carbon fibre + thermoset resin; pultruded manufacture; high fibre content, typically >60 %; strip thickness up to ≈3 mm), specimen cutting and preparation, and tensile testing using bonded anchorage blocks to determine tensile strength and modulus for design and quality control.

Key topics and requirements

• Definition of applicable CFRP strip types (carbon fibre + thermoset resin, pultruded, high fibre fraction, thickness ≤ ~3 mm).
• Specimen preparation: cutting specimens along the strip axis and attaching bonded anchorage blocks for testing.
• Tensile testing procedures to determine tensile strength, tensile modulus and strain characteristics of CFRP strips.
• Requirements for test equipment calibration and verification (alignment with standard test‑machine calibration practice).
• Material and dimensional characterization relevant to bond and external bonding performance on concrete.
• Normative/related test references used for calibration and complementary methods.

Typical use and users

Used by materials and structural testing laboratories, CFRP‑strip manufacturers, civil and structural engineers, research organisations, and contractors performing concrete strengthening or rehabilitation with externally bonded CFRP reinforcement. Typical uses include product qualification, quality control, research, and input data for structural design or retrofit specifications.

Related standards

Part of the ISO 10406 series on FRP reinforcement test methods. Relevant related standards include ISO 10406-1 (FRP bars), ISO 10406-2 (FRP sheets) and ISO 10406-4 (FRP grids). ISO 10406 parts of the series are maintained by ISO/TC 71/SC 6; parts 1, 2 and 4 have more recent revisions published in 2025. Other normative references commonly used with ISO 10406-3 include machine calibration standards and complementary material test methods used for FRP products.

Keywords

CFRP strips; FRP reinforcement; concrete strengthening; pultruded CFRP; tensile test; bonded anchorage; tensile strength; tensile modulus; ISO 10406; test methods; external bonded reinforcement.

FAQ

Q: What is this standard?

A: ISO 10406-3:2019 is an ISO test‑methods standard that specifies how to prepare and test unidirectional CFRP strips used as externally bonded reinforcement on concrete, with emphasis on tensile testing using bonded anchorage.

Q: What does it cover?

A: It covers the types of CFRP strips to which the methods apply (carbon fibre + thermoset resin, pultruded, high fibre content, thickness up to ≈3 mm), specimen cutting and preparation, and tensile test procedures (strength, modulus, strain) including the use of bonded anchorage blocks.

Q: Who typically uses it?

A: Manufacturers of CFRP strips, independent testing laboratories, structural/materials engineers, researchers, and contractors working on concrete strengthening and rehabilitation projects.

Q: Is it current or superseded?

A: ISO 10406-3:2019 is current. It was published on 25 July 2019 and was reviewed and confirmed in 2025 (confirmed during the ISO five‑year review cycle), so the 2019 edition remains the valid edition.

Q: Is it part of a series?

A: Yes — it is Part 3 of the ISO 10406 series (test methods for FRP reinforcement of concrete). Other parts address FRP bars (Part 1), FRP sheets (Part 2) and FRP grids (Part 4); several parts of the series have been revised in 2025.

Q: What are the key keywords?

A: CFRP strips, FRP reinforcement, tensile test, bonded anchorage, pultrusion, carbon fibre, thermoset resin, external bonded reinforcement, ISO 10406.