ISO 10406-2:2025

Overview

ISO 10406-2:2025 - Fibre-reinforced polymer (FRP) reinforcement of concrete - Test methods - Part 2: FRP sheets provides standardized laboratory procedures for testing FRP sheets used to upgrade and strengthen concrete members. The third edition specifies how to prepare test pieces, carry out tensile, bond and splice tests, and report results. It supports consistent evaluation of material performance for design, quality control and research.

Key topics and technical requirements

The standard details test methods and the essential parameters to ensure reproducible, comparable results. Major topics include:

• Test piece preparation and conditioning
  • Types, dimensions, curing and conditioning of specimens; anchorage and notching for specific tests.
• Tensile properties
  • Procedures for tensile testing of FRP sheets, strain measurement (strain gauges/extensometers), loading rate, and expression of tensile strength, Young’s modulus and ultimate strain.
• Overlap splice strength
  • Test layout, failure category definitions and calculation of splice capacity for overlapped sheet terminations.
• Bond properties to concrete
  • Methods to determine bond strength and interfacial fracture energy between FRP sheets and concrete substrates.
• Direct pull-off strength
  • Setup and procedures to measure pull-off resistance of sheet-to-concrete systems and classification of failure modes.
• Durability testing
  • Environmental conditioning such as freeze/thaw resistance and other conditioning regimes referenced for long-term performance.
• Testing equipment and data reporting
  • Requirements for testing machines, chucks, measuring devices, test temperature control, range of test and standardized test report content.

Keywords integrated: ISO 10406-2:2025, FRP sheets, fibre-reinforced polymer, test methods, bond strength, tensile properties, overlap splice, pull-off.

Applications and users

ISO 10406-2:2025 is directly applicable to professionals involved in the evaluation and use of FRP sheet systems for concrete strengthening:

• Structural and civil engineers assessing retrofit solutions for beams, slabs, columns and bridge decks
• Materials testing laboratories performing qualification and quality control of FRP sheets
• Manufacturers and suppliers of FRP composites developing product data and test certificates
• Contractors and inspectors verifying installation performance and long-term durability
• Researchers and standards committees comparing materials and informing design guidance

Practical uses include verifying material properties for design, comparing different FRP systems, establishing acceptance criteria, and supporting durable rehabilitation techniques.

Related standards

Related documents include other parts of the ISO 10406 series and national/international concrete reinforcement and testing standards that address FRP bars, design principles and complementary test procedures. For project compliance, use ISO 10406-2 alongside applicable design codes and material specifications.