ASTM C233
Full Name
ASTM C233 – Standard Test Method for Air-Entraining Admixtures for Concrete
Scope
ASTM C233 outlines the procedures for testing materials proposed for use as air-entraining admixtures in concrete. These admixtures are chemicals added to concrete to create and stabilize microscopic air bubbles, improving the concrete’s durability and resistance to freeze-thaw cycles.
The scope of ASTM C233 includes:
- Materials: the standard applies to all types of air-entraining admixtures, regardless of their chemical composition or physical form.
- Test methods: it provides detailed instructions for conducting various tests to evaluate the effectiveness and performance of air-entraining admixtures, including:
- Air content: measuring the air content of freshly mixed concrete containing the admixture.
- Bleeding: assessing the potential for bleeding (separation of water) in concrete containing the admixture.
- Strength: determining the compressive and flexural strength of hardened concrete containing the admixture.
- Length change: evaluating the potential for shrinkage or expansion of hardened concrete containing the admixture.
- Freezing and thawing resistance: assessing the durability of concrete containing the admixture under repeated freezing and thawing cycles.
- Acceptance criteria: the standard establishes minimum performance requirements for air-entraining admixtures based on the results of the specified tests.
ASTM C233 does not cover:
- Chemical composition: the standard does not specify the chemical composition of air-entraining admixtures, as different types of admixtures may have different formulations.
- Environmental impact: the standard does not address the potential environmental impact of air-entraining admixtures or their degradation products.
Overall, ASTM C233 plays a crucial role in ensuring the quality and performance of air-entraining admixtures used in concrete. By adhering to the standard, manufacturers and users can verify that the admixtures meet the required specifications and will perform as intended in concrete applications.
ASTM C233 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C233 standard.
Our laboratory offers ASTM C233 testing services to help you ensure the optimal performance of your concrete mix. Through this testing, we can determine:
- Whether the air-entraining admixture meets the desired air content requirements.
- The impact of the admixture on the compressive strength and workability of the concrete.
- The suitability of the admixture for your specific project needs.
Our expertise in ASTM C233 testing can contribute to the success of your construction project by ensuring you use concrete with the right balance of air content, strength, and workability. Contact us today to discuss your air-entraining admixture testing needs.
Resources
Keywords
air-entraining admixture; concrete; air content; bleeding; strength; length change; freezing and thawing; durability