ASTM C226-22 PDF

Overview

ASTM C226-22 is the internationally recognized standard specification for air-entraining additions used in the manufacture of air-entraining hydraulic cement. Developed by ASTM International, this standard establishes requirements for the materials, testing methods, and performance criteria for air-entraining additives that are interground with cement clinker. Adherence to ASTM C226-22 ensures the production of hydraulic cements capable of delivering improved workability, durability, and resistance to freezing and thawing, especially in cold weather environments and demanding construction applications.

By following this specification, manufacturers and suppliers can ensure that air-entraining additions meet strict quality, consistency, and performance standards, supporting cement products that align with specifications such as ASTM C150/C150M, ASTM C595/C595M, and ASTM C1157/C1157M.

Key Topics

• Material Requirements: Defines acceptable materials for use as air-entraining additions in hydraulic cement, including reference additions and aggregate grading requirements.
• Performance Standards: Outlines performance properties for cements containing these additions, such as setting time, compressive strength, air content, flexural strength, and durability under freezing and thawing.
• Test Methods: Specifies laboratory procedures for evaluating:
  • Chemical composition and consistency
  • Fineness and normal consistency of cement
  • Time of setting and autoclave expansion
  • Compressive and flexural strengths, and length change of mortar
  • Air content of both mortar and plastic concrete
• Sampling and Evaluation: Details protocols for sample preparation, weighing, mixing, and the creation of test specimens for comprehensive quality assessment.
• Reporting: Identifies required elements in test reports, such as material identification, test results, and compliance statements for regulatory and quality assurance purposes.

Applications

The ASTM C226-22 standard is integral to various sectors of the construction and materials industries, providing key guidelines for:

• Hydraulic Cement Manufacturing: Ensuring air-entraining additions are consistently blended for the production of air-entraining Portland cement, blended hydraulic cements, and performance hydraulic cements.
• Ready-Mixed Concrete Production: Supporting the creation of concrete with enhanced durability and workability for infrastructure, roads, bridges, and cold climate constructions.
• Quality Assurance in Construction: Providing a basis for independent laboratory testing and compliance verification throughout the supply chain.
• Specification and Procurement: Assisting engineers, architects, and contractors in project specification and procurement of hydraulic cements with validated air-entraining performance.
• Research and Development: Enabling material scientists to develop new admixtures and cementitious products that meet or exceed industry benchmarks for freeze-thaw resistance and longevity.

Related Standards

Organizations operating under ASTM C226-22 may also reference the following standards for a comprehensive approach to cement and concrete quality:

• ASTM C33/C33M: Specification for Concrete Aggregates
• ASTM C39/C39M: Test Method for Compressive Strength of Cylindrical Concrete Specimens
• ASTM C109/C109M: Test Method for Compressive Strength of Hydraulic Cement Mortars
• ASTM C150/C150M: Specification for Portland Cement
• ASTM C185: Test Method for Air Content of Hydraulic Cement Mortar
• ASTM C595/C595M: Specification for Blended Hydraulic Cements
• ASTM C1157/C1157M: Performance Specification for Hydraulic Cement
• ASTM C138/C138M, C143/C143M, C231/C231M, C151/C151M, C293/C293M, C596, C666/C666M: Various test methods for density, setting times, air content, expansion, strength, shrinkage, and freeze-thaw resistance

Practical Value

Compliance with ASTM C226-22 provides tangible benefits, including enhanced concrete durability, uniformity, and quality control. It ensures that air-entraining additions are reliable and effective, reduces the risk of concrete damage from freeze-thaw cycles, and supports sustainable, long-lasting infrastructure. This standard is essential for manufacturers, suppliers, and project stakeholders who require consistent, high-performance air-entraining hydraulic cements in their construction projects.