Air-Entraining Agent

Air-entraining agents (AEAs) are additives used in dry mortar to introduce and stabilize microscopic air bubbles within the mortar matrix. These tiny air voids significantly enhance the mortar’s freeze-thaw resistance, workability, and overall durability, especially in cold and wet environments.

Features of Air-Entraining Agents for Dry Mortar:

• Improves Freeze-Thaw Resistance: Air bubbles provide space for expansion of water as it freezes, reducing cracking.
• Enhances Workability: Makes the mortar easier to mix, pump, and apply.
• Increases Durability: Protects against cracking and scaling over time.
• Reduces Water Demand: Can improve the workability without additional water, helping to maintain strength.

Usage Guidelines:

• Dosage typically ranges from 0.02% to 0.1% of the binder weight.
• Mix thoroughly to evenly disperse the agent.
• Usually added during the initial mixing phase with dry components or with water in the mixing process.

Application Tips:

• Perform trial mixes to optimize dosage.
• Ensure good dispersion to achieve consistent air bubble distribution.
• Test the finished mortar for air content and freeze-thaw performance when necessary.