What is the mechanism of adding air-entraining agents to improve the durability of concrete?

air-entraining agent is one of the chemicals. it has good bubble structure, small bubble radius, and high frost resistance index. it is used in high-durability concrete structures, such as dams, high-grade highways, thermal power station cooling towers, pool hydraulics, ports, etc. it is also a commonly used additive to improve the durability of concrete pavements.…