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Cemairin 260
 

Cemairin
280

AIR-ENTRAINING ADMIXTURE
 
Advantages:
  • Improves the durability of concrete against frost and severe weathering conditions
  • Significantly improves the cohesion of concrete mixes
  • Improves workability
  • Chloride-free
Description:

Cemairin 280 is an air-entraining admixture for concrete, formulated from selective polymers to create highly stable microscopic air bubbles which distribute uniformly in the concrete mix.

This effect can be used to improve the resistance of concrete mixes against freezing and thawing, severe weathering and de-icing compounds.

Usage

  • In areas where there is a potential for frost damage such as roadways, airport aprons and runways
  • Can be used with conventional ready mix concrete as well as concrete mixes which include micro-silica, fly ash as well as GGBS

Materials Supplied

Cemairin 280 is available in 275 gal (1,041 litre) and 330 gal (1,249 litre) IBC totes. Bulk supply in tanker trucks is also available upon request. 

Shelf Life

Cemairin 280 has a shelf life of 12 months from date of manufacture if stored at temperatures between 35°F and 122°F (2°C and 50°C).

Application Instructions

Cemairin 280 should be added to the concrete with the mixing water to achieve optimum performance.

An automatic dispenser should be used to dispense the correct quantity of Cemairin 280 to the concrete mix.

DOSAGE

The recommended dosage of Cemairin 280 to achieve air content in range of 3 - 7% is ¼ to 2.3 fl oz/100 Ib (16 - 150 ml/100 kg) of cement or cementitious materials in the mix including GGBFS, PFA or micro-silica.

Representative trials should be first conducted to determine the optimum dosage of Cemairin 280 to meet the performance requirements by using the materials and conditions in actual use.

POINTS TO BE CONSIDERED AFFECTING AIR ENTRAINMENT

Any variation in the following factors can cause change in the air content:

  1. Cement fineness.
  2. Concrete temperature.
  3. Sand grading.
  4. Mixture types.
  5. Compaction method.
  6. Carbon or organic impurities

EFFECTS OF OVER DOSAGE

Overdosage of Cemairin 280 will cause the following:

  •   - Significant increase in air content which may cause slight                 reduction in the compressive strength.
  •   - Slight increase in setting time

HEALTH AND SAFETY

Consult the appropriate Material Safety Data sheet prior to using Cemairin 280.

GENERAL GUIDANCE

This data sheet is for general guidance purposes only and may contain information that is inappropriate for certain conditions of use. Accordingly, all recommendations and suggestions are made without guarantee. Further information is available from our Technical Department.



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Don Construction Products Inc.

Headquarters
2826 Lineberger Industrial Dr.
Lancaster, SC 29720

Tel: +1 803 286 5430
Fax: +1 803 286 5432

E-mail: info.usa@dcp-int.com