Overview
ISO 10406-2:2015, "Fibre-reinforced polymer (FRP) reinforcement of concrete - Test methods - Part 2: FRP sheets", is an international standard that defines laboratory test methods for FRP sheets used in upgrading and strengthening concrete members. Published by ISO (second edition, 2015), it provides vocabulary, symbols, specimen requirements, test procedures, calculation rules and reporting formats to assess mechanical and durability properties of fibre‑reinforced polymer sheets.
Key Topics and Technical Requirements
The standard covers a comprehensive suite of test methods and related provisions, including:
- Terms, definitions and symbols - unified terminology for FRP sheets, bond area, effective bond length, tensile capacity, etc.
- General provisions for test pieces - specimen types, conditioning and preparation rules.
- Tensile properties - procedures to determine tensile strength, ultimate strain and Young’s modulus of FRP sheets.
- Overlap splice strength - methods for measuring splice performance of sheet overlaps used in field joints and repairs.
- Bond properties to concrete - tests to determine bond strength, effective bond length and interfacial fracture energy between FRP sheets and concrete substrates.
- Direct pull‑off strength - pull‑off test methods using steel devices bonded to FRP sheets on concrete.
- Durability and environmental resistance:
- Freeze/thaw resistance tests
- Exposure to laboratory light sources (accelerated UV/weathering)
- General durability test procedures and reporting
- Accuracy, calculation and reporting - rules for expressing results, retention rates after conditioning, and required test report contents.
Normative references cited include ISO 31-0, ISO 291, ISO 4892 series (laboratory light exposure), ISO 5725 (measurement accuracy) and ISO 7500-1 (testing machine verification).
Practical Applications and Who Uses This Standard
ISO 10406-2 is used by:
- Materials testing laboratories for quality control and certification of FRP sheets.
- FRP manufacturers to validate product mechanical properties and durability claims.
- Structural engineers and designers specifying reliable FRP reinforcement for concrete strengthening and retrofit projects.
- Contractors and installers to assess splice/bond requirements and ensure correct application procedures.
- Research & development teams developing new FRP systems or formulations.
- Standards committees and regulators referencing consistent test methods in codes and specifications.
Typical applications include external strengthening of beams, slabs and columns, seismic retrofits, and corrosion‑free reinforcement systems where FRP sheets bond to concrete surfaces.
Related Standards
- ISO 10406-1: FRP bars and grids (companion part for other FRP reinforcement forms)
- ISO 4892 (exposure to laboratory light sources) and ISO 7500-1 (testing machine verification) - both are normatively referenced.
Keywords: ISO 10406-2, FRP sheets, fibre‑reinforced polymer, test methods, tensile strength, bond strength, overlap splice, pull‑off test, durability, concrete strengthening.
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