ASTM C452
Full Name
ASTM C452 – Standard Test Method for Potential Expansion of Portland-Cement Mortars Exposed to Sulfate
Scope
ASTM C452 is a standard test method specifically designed for portland cements. It focuses on determining the potential expansion of mortar bars when exposed to sulfate environments. This is achieved by creating mortar bars from a mixture of portland cement and gypsum, ensuring a sulfur trioxide (SO3) content of 7.0 mass %. The expansion of these bars under controlled conditions serves as an indicator of the cement’s sulfate resistance.
Key points about the scope of ASTM C452:
- Applicability: the test method is exclusively applicable to portland cements.
- Purpose: the primary purpose is to assess the potential expansion of portland cement mortars due to sulfate exposure.
- Measurement: it involves measuring the length change of mortar bars over time while immersed in a sulfate solution.
- Units: both SI units and inch-pound units are recognized as standard in the test method.
- Safety: the standard acknowledges the caustic nature of fresh hydraulic cementitious mixtures and advises users to take necessary precautions.
The test method is primarily used in research to evaluate sulfate resistance of portland cement. It’s also used to ensure that sulfate-resisting portland cement meets the requirements specified in ASTM C150 (Standard Specification for Portland Cement).
ASTM C452 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C452 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
mortar bars; portland cement; sulfate exposure; potential expansion; length change; sulfate solution; sodium sulfate; magnesium sulfate; expansion test; sulfate resistance; gypsum; water-cement ratio; curing conditions; storage solution; test duration