Overview
ISO 14824-2:2012 - "Grout for prestressing tendons - Part 2: Grouting procedures" specifies the procedures, testing and site controls for grouting tendons in post‑tensioned prestressed concrete. Applicable to all structure types (including bridges and buildings), the standard ensures that grouting operations protect prestressing steel, provide required bond where specified, transfer transverse compressive stresses and fill voids that could collect water and cause frost damage. The document also sets out requirements for suitability testing and inspection testing of grouts and their component materials used on a project.
Key topics and requirements
- Scope and purpose: Procedures for grouting tendons in post‑tensioned prestressed concrete; suitability and inspection testing for project materials.
- Documentation and execution: Execution specification, quality plan and execution documentation (method statements, shop drawings, records of materials and test results) must be available on site.
- Grout assessment: Suitability testing using the proposed materials, equipment and personnel before production grouting. Typical tests referenced include sieve, fluidity, bleed, volume change, compressive strength and density (see ISO 14824-3 for methods). The standard distinguishes three testing regimes: initial type/audit testing (ISO 14824-1), project suitability testing (ISO 14824-2) and production inspection testing.
- Equipment and materials: Requirements for mixers, pumps, hoses, inlet connections and storage/agitation to permit continuous, interruption‑free filling of ducts.
- Grouting procedures: Site controls for inlets/outlets and anchorages, pre‑grouting precautions, temperature considerations, continuous grouting operations and post‑grouting measures.
- Quality management: Personnel qualifications, inspection regimes, conformity criteria and corrective action procedures; records retention and traceability requirements.
Practical applications
ISO 14824-2 provides actionable guidance for:
- Executing reliable grouting procedures on post‑tensioned structures to reduce corrosion risk and ensure structural performance.
- Planning project‑specific suitability testing and full‑scale grouting trials where tendon geometry is novel or unproven.
- Specifying equipment, quality control, and documentation for contractors and specialist grouting teams.
- Supporting compliance checks and acceptance testing for owners, engineers and third‑party inspectors.
Who uses this standard
- Specialist grouting contractors and on‑site crews
- Bridge and building contractors carrying out post‑tensioning works
- Structural engineers and designers specifying post‑tensioned systems
- Quality assurance inspectors and laboratory personnel
- Asset owners and authorities requiring documented evidence of proper grouting
Related standards
- ISO 14824-1 - Grout for prestressing tendons: Basic requirements (initial/type testing)
- ISO 14824-3 - Grout for prestressing tendons: Test methods (detailed test procedures)
- ISO 22966 - Execution of concrete structures (referenced execution requirements)
Using ISO 14824-2:2012 in project specifications improves durability, conformity and traceability of grouting works for post‑tensioned prestressed concrete.