ASTM C531
Full Name
ASTM C531 – Standard Test Method for Linear Shrinkage and Coefficient of Thermal Expansion of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes
Scope
ASTM C531 establishes a standardized procedure for measuring the linear shrinkage and coefficient of thermal expansion (CTE) of chemical-resistant mortars, grouts, monolithic surfacings, and polymer concretes. These properties are critical for evaluating the durability and performance of these materials, particularly in applications where they are exposed to temperature fluctuations or chemical environments.
Test procedure:
- Sample preparation: specimens are prepared according to ASTM C531 specifications, ensuring consistent dimensions and curing conditions.
- Linear shrinkage measurement: the initial length of the specimens is measured, and then they are subjected to controlled drying conditions. The final length is measured after a specified drying period, and the linear shrinkage is calculated.
- Coefficient of thermal expansion measurement: the specimens are subjected to controlled temperature changes, and the dimensional changes are recorded. The CTE is calculated based on the temperature change and the corresponding dimensional change.
Key considerations:
- Specimen size and shape: the size and shape of the specimens can influence test results.
- Drying conditions: the drying conditions, including temperature, humidity, and airflow, can affect linear shrinkage.
- Temperature range: the temperature range used for CTE measurement should be representative of the intended application.
ASTM C531 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C531 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
linear shrinkage; coefficient of thermal expansion; chemical-resistant materials; mortars; grouts; monolithic surfacings; polymer concretes; test method