ISO 10406-4-2025 PDF

Full title and description

Fibre-reinforced polymer (FRP) reinforcement of concrete — Test methods — Part 4: FRP grids. This International Standard specifies test methods applicable to FRP grids used as reinforcement or pre-stressing tendons in concrete, covering physical, mechanical, durability, long-term durability and bond properties for FRP grids composed of fibres (aramid, basalt, carbon, glass) in a resin matrix.

Abstract

This document defines standardized test procedures for FRP grids intended for use in new concrete construction and rehabilitation of existing reinforced concrete structures. It addresses identification of material constituents, mechanical characterization, bond behaviour to concrete, and accelerated/long-term durability tests (including alkali resistance). The standard clarifies that FRP grids are rigid arrays of interconnected FRP bars and excludes textile/fabric mesh types.

General information

• Status: Published.
• Publication date: 2025-09 (Edition 1).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 83.120, 91.100.30.
• Edition / version: Edition 1 (2025).
• Number of pages: 36.

Scope

The scope covers test methods for FRP grids used as reinforcement or pre-stressing tendons in concrete, including procedures for determining physical and mechanical properties, bond performance with concrete, and durability/long-term behaviour (with particular reference to alkali resistance). The document specifies applicable fibre types (aramid, basalt, carbon, glass) and matrix types (thermosetting and thermoplastic resins), and explicitly excludes fibre textiles and fabric mesh products from the definition of FRP grids.

Key topics and requirements

• Standardized test methods for physical characterization (dimensions, mass, fibre content) of FRP grids.
• Mechanical testing procedures (tensile, compressive where applicable, stiffness/modulus, and strength properties).
• Bond tests to assess interaction between FRP grid elements and concrete (bond strength, slip characteristics).
• Durability and long-term performance tests, including accelerated ageing and alkali resistance assessments.
• Definitions and classification of FRP grid materials by fibre and resin type; exclusion of textile/fabric mesh from the FRP grid category.
• Conformance and reporting requirements for laboratories and manufacturers performing the tests.

Typical use and users

Used by materials and structural testing laboratories, FRP manufacturers, structural and geotechnical engineers, infrastructure owners and contractors, product certification bodies, and standards committees when specifying, testing, certifying or approving FRP grid products for concrete reinforcement and rehabilitation projects.

Related standards

This part is part of the ISO 10406 series on FRP reinforcement test methods. Related and recently updated parts include ISO 10406-1:2025 (FRP bars), ISO 10406-2:2025 (FRP sheets) and other series documents that define test methods for different FRP product forms; ISO 10406-4:2025 replaces former combined items in earlier editions (superseding elements of ISO 10406-1:2015 where applicable).

Keywords

FRP grids, fibre-reinforced polymer, test methods, bond testing, durability, alkali resistance, carbon fibre, glass fibre, basalt fibre, aramid fibre, concrete reinforcement.

FAQ

Q: What is this standard?

A: ISO 10406-4:2025 is an International Standard that specifies test methods for FRP grids used as reinforcement and pre-stressing tendons in concrete.

Q: What does it cover?

A: It covers physical and mechanical characterization, bond testing with concrete, and durability/long-term performance tests (including alkali resistance) for FRP grids; it also defines material classifications and exclusions (for example, textile/fabric meshes are excluded).

Q: Who typically uses it?

A: Materials and structural testing laboratories, FRP manufacturers, structural engineers, contractors, certification bodies and standards committees use this standard to ensure consistent testing, product specification and acceptance criteria for FRP grid reinforcement.

Q: Is it current or superseded?

A: ISO 10406-4:2025 is published and current (publication September 2025). It forms part of an update to the ISO 10406 series and supersedes or redistributes content from earlier editions such as ISO 10406-1:2015 where applicable.

Q: Is it part of a series?

A: Yes — it is Part 4 of the ISO 10406 series (test methods for FRP reinforcement of concrete); other parts in the 2025 updates include parts addressing FRP bars (Part 1) and FRP sheets (Part 2).

Q: What are the key keywords?

A: FRP grids, FRP reinforcement, test methods, bond, durability, alkali resistance, carbon/glass/basalt/aramid fibres.