Application

FARSIZAL AIR is recommended for all concretes exposed to cyclic freezing and thawing like:

• Light weight concrete
• Mass concrete
• Paving concrete
• Ready-mix concrete
• Structural concrete
• FARSIZAL AIR is suitable for all types of cement

Advantages

• Provides a stable air void system with proper bubble size and spacing. The air void system protects concrete against damage caused by repeated freeze/ thaw cycles.
• The air bubbles act as “Ball – Bearings” to greatly improve the plasticity and work ability of the concrete, making it easier to flow in to forms or be pumped in to place
• Less mixing water can be used
• Minimize bleeding and segregation
• FARSIZAL AIR aids in finishing and produces more watertight concrete with a lower water-cement ratio
• Increased resistance to scaling from deicing salts
• Makes concrete more durable

Method of Use

• FARSIZAL AIR is supplied ready for use and is completely miscible in water
• It can be added in to the mixer at the same time as the mixing water
• It should not be added directly to the cement or dry materials
• FARSIZAL AIR may be added at the end of mixing process by dispensing equipment or it may also be added to the concrete in a drum of ready mix truck, it should be mixed at least 1 minute per m³ of concrete at high speed

Dosage

• FARSIZAL AIR is normally dosed at a rate of 40 to 80gr per 100kg of cement and will generally entrain 3 to 6% air in concrete.
• Higher dosages may be utilized for special conditions and applications.
• Field-testing is recommended to determine the optimum dosage and effect on both plastic and hardened concrete properties such as: workability and workability retention, setting time, early and ultimate strength.

Factors influencing amount of entrained air and dosage rate

The amount of FARSIZAL AIR required to obtain a given air content will very widely depending on:

• Particle shape and grading of organic the aggregate used.
• Impurities in the aggregate and hardness of water.
• Fineness of cement
• Amount of alkali in cement.

Effect of materials and proportions on air content

Effects of material and construction variable on air content