Overview
ISO 1927-8:2012 - Monolithic (unshaped) refractory products - Part 8: Determination of complementary properties - specifies standardized test methods for measuring additional (complementary) properties of unshaped refractory materials. It is part of the ISO 1927 series and is intended for test pieces prepared and stored in accordance with ISO 1927-5. The methods complement ISO 1927-6 and adapt test procedures from shaped refractory standards to suit dense and insulating castables, ramming materials and other unshaped refractory types, both before and after firing.
Key Topics
- Scope of tests: The standard defines procedures for selected complementary properties; it does not require all tests to be performed for every material.
- Test methods referenced: Adapted from established standards such as ISO 8841 (gas permeability), ISO 8894‑1 / ISO 8894‑2 (thermal conductivity, hot‑wire methods), ISO 8890 (sulfuric acid resistance), ISO 10060 (carbon-containing products), ISO 12676 (CO resistance), ISO 16282 (abrasion at ambient temperature) and EN 993‑11 (thermal shock).
- Specimen preparation and formats: Test pieces must be prepared per ISO 1927-5; common specimen formats A, B or C are used depending on the test. Example: format B specimens for thermal shock are 230 × 64 × 54 mm.
- Key procedural requirements:
- Drying: many tests require drying at 110 °C ± 5 °C for at least 24 h.
- Thermal shock: standardized quench temperature is 950 °C with a recommended 5 h pre‑firing at ≥950 °C (unless parties agree otherwise).
- Conductivity: measured on dried, fired or unfired specimens using hot‑wire methods; equilibrium at measurement temperature must be ensured.
- Carbon-containing products: properties measured before carbonization, after carbonization and after total carbon removal following ISO 10060.
- Reporting: Test reports must identify the sample, reference ISO 1927‑8:2012, list methods used, describe specimen state/preparation, and present individual determinations and averages.
Applications
Who uses ISO 1927-8:2012:
- Refractory manufacturers (castables, ramming mixes, insulating concretes) for product development and quality control.
- Independent test laboratories and R&D departments validating material behavior (permeability, thermal shock, conductivity, chemical resistance, abrasion, CO resistance).
- Process, materials and metallurgical engineers specifying refractory linings in steel, foundry, glass, cement, petrochemical and power industries.
- Procurement/specification writers who require standardized test evidence for acceptance criteria.
Practical benefits:
- Enables consistent, comparable property data for unshaped refractories.
- Helps assess material performance before service (pre‑ and post‑firing) and under relevant chemical/thermal conditions.
- Supports material selection, failure analysis and lifecycle assessment of refractory linings.
Related Standards
Keywords: ISO 1927-8:2012, monolithic refractory products, unshaped refractory products, complementary properties, permeability to gases, thermal shock resistance, thermal conductivity, sulfuric acid resistance, carbon-containing refractory tests, CO resistance, abrasion resistance, test methods.
Open preview (PDF)Monolithic (unshaped) refractory products — Part 8: Determination of complementary properties
