ISO 10406-1:2025

Overview

ISO 10406-1:2025 - Fibre-reinforced polymer (FRP) reinforcement of concrete - Test methods - Part 1: FRP bars - is an international standard that specifies standardized test methods for FRP bars used as reinforcement or pre-stressing tendons in concrete. The document covers physical, short-term mechanical, durability and long-term mechanical properties for FRP bars manufactured from fibres (aramid, basalt, carbon, glass) embedded in thermosetting (e.g., vinylester, unsaturated polyester) or thermoplastic (e.g., polypropylene, polyamides, polymethyl methacrylate) matrices.

Key topics and technical requirements

The standard defines required test procedures and reporting for core property categories, including:

• Physical properties
  • Cross-sectional area, fibre volume fraction, coefficient of thermal expansion.
• Short-term mechanical properties
  • Tensile properties, bond strength to concrete, anchorages and couplers, transverse shear strength, flexural tensile properties.
• Durability tests
  • Alkali resistance (immersion, mass change, tensile retention, visual inspection).
• Long-term mechanical properties
  • Long-term relaxation, tensile fatigue strength, creep rupture strength.

Each test section specifies:

• Test piece preparation and geometry
• Test equipment and environmental conditions (e.g., temperature)
• Step-by-step test procedures and calculations
• Required test report content

These systematic requirements enable consistent measurement of properties such as tensile strength, bond strength, fatigue performance, and alkali resistance - key metrics for evaluating FRP bars for concrete reinforcement.

Practical applications and who uses this standard

ISO 10406-1:2025 is a practical resource for stakeholders involved in the design, manufacture, testing and specification of FRP reinforcement:

• Manufacturers - quality control, material development and product certification.
• Testing laboratories - standardized methods for reproducible test data.
• Structural and civil engineers - material selection, design verification and performance assessment.
• Construction and precast producers - procurement specifications and compliance checks.
• Researchers and standards bodies - comparative studies, validation of novel fibre/resin combinations.

Adopting the standard supports reliable performance data for designers and specifiers, facilitates regulatory acceptance, and helps ensure long-term durability in concrete structures where corrosion-resistant, lightweight reinforcement is required.

Related standards

• ISO 10406-1 is part of the ISO 10406 series on FRP reinforcement test methods. Users should consult other ISO and national standards on FRP design, installation and complementary test methods to ensure complete compliance and application-specific guidance.

Keywords: ISO 10406-1:2025, FRP bars, fibre-reinforced polymer reinforcement, concrete reinforcement testing, tensile strength, durability testing, bond strength.