18 September 2026

Concrete structures exposed to changing climatic conditions may experience repeated freezing and thawing throughout their service life. Water penetrating the concrete pores expands when frozen and can create internal stresses within the concrete. Repeated freeze-thaw cycles may lead to surface deterioration, cracking and loss of durability over time.

What Are Air-Entraining Concrete Admixtures?

Air-entraining admixtures are special chemical admixtures designed to create controlled and uniformly distributed microscopic air voids within the concrete. These microscopic voids provide additional space for water to expand when it freezes, helping reduce the internal pressure generated inside the concrete.

As a result, concrete can achieve improved resistance to freeze-thaw cycles and maintain its structural performance for a longer period under challenging climatic conditions.

How Do Air Voids Improve Freeze-Thaw Resistance?

Water absorbed by concrete increases in volume when it freezes. If there is insufficient space within the concrete structure to accommodate this expansion, internal pressure develops and may cause cracking or surface damage.

The microscopic air void system created by air-entraining admixtures provides expansion chambers for freezing water. This helps reduce internal stress and supports the long-term durability of concrete exposed to repeated freezing and thawing.

Improved Concrete Performance in Harsh Climatic Conditions

Air-entraining admixtures are particularly important in regions where temperatures frequently fall below freezing. When properly selected and dosed, these admixtures contribute to improved durability in concrete exposed to severe winter conditions.

They are widely used in roads, bridges, airports, dams, retaining structures, outdoor concrete applications and infrastructure projects exposed to water and changing temperatures.

Contribution to Workability and Application Performance

In addition to improving freeze-thaw resistance, air-entraining admixtures can also contribute to the workability of fresh concrete. Properly distributed microscopic air bubbles can make the concrete mixture easier to place, compact and finish.

However, the amount of entrained air must be carefully controlled because excessive air content may negatively affect concrete strength. For this reason, admixture dosage should be determined according to the concrete mix design, cement type, aggregate characteristics and project requirements.

Long-Term Durability in Infrastructure Projects

Roads, bridge decks, pavements, dams and outdoor concrete structures are continuously exposed to environmental effects throughout their service life. Freeze-thaw resistance is therefore one of the most important parameters affecting the durability of concrete in cold climates.

The use of suitable air-entraining admixtures contributes to reducing deterioration caused by repeated freezing and thawing and supports longer-lasting concrete structures.

EMA Kimya Air-Entraining Admixture Solutions

EMA Kimya develops high-performance air-entraining concrete admixtures for projects requiring improved resistance to freeze-thaw cycles and demanding climatic conditions. With project-specific product selection and technical support, EMA Kimya provides solutions that contribute to controlled air content, improved workability and long-term concrete durability.