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Concrete Admixtures

Duplast Airex

Air Entraining Admixtures/ Water Reducer

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Duplast AIREX is designed to produce air entrainment in concrete mixes. It is used whenever compacted, durable concrete with resistance to frost action and effects of deicing salt is required. It improves workability & reduces tendency of bleeding. It also reduces density of light weight blocks, without impairing strength. It gives increased durability to dense concrete blocks & because of entrained air; a reduction in material cost is achieved.

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Mass concreting works of dams, marine environment and concrete subjected to ground water salt.

Duplast AIREX is used to produce workable and durable concrete for roads, runways, taxiways, power stations and underground water tanks.

Advantage and Benefits

Controllable rate of addition

Air entrainment without loss in strength

Improves cohesion and workability

Enables water reduction

Gives good freeze-thaw resistance

Chloride free

Reduces permeability

Reduces segregation and bleeding

Typical Properties

IS 9103 BS 5075 Part 2

Method of Use

Duplast AIREX should be added preferably through a calibrated dispending unit and added to the mix with the gauging water to ensure correct mixing.


The dosage rate of 100ml – 250ml of Duplast AIREX per 50kg of cement bag will normally produce an entrainment of 4%-5%.

The dosage rate of Duplast AIREX will vary depending upon the particular materials and mix design being used.

Safety precautions

As with all chemical products, care should be taken during use and storage to avoid contact with eyes, mouth, skin and foodstuffs (which can also be tainted with vapour until product is fully cured or dried).

  • Do not reuse containers for storage of consumable item.
  • Duplast AIREX is a non-toxic and inflammable. When in contact with the skin, it should be washed with cold water.
  • If accidentally ingested, seek immediate medical attention.
  • Treat splashes to eyes and skin immediately.
  • Keep away from children and animals.
  • Reseal containers after use.

Technical Information

Form Brown Liquid
Chloride Content Nil
pH 7.5
Specific Gravity 1.23 ± 0.02 at 25ºC

Other Information


50kg, 100kg and 250kg in plastic barrel

Storage Life

Duplast AIREX has shelf life of one year in manufactures unopened containers protect from frost & direct sunlight.

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