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RB-AE AIR-ENTRAINING ADMIXTURE FOR CONCRETE - rbbco

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RB-AE AIR-ENTRAINING ADMIXTURE FOR CONCRETE


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DESCRIPTION

RB-AE is an air-entraining admixture, which creates ultra-stable air bubbles that are strong, small and closely spaced.


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APPLICATION FIELDS

Entraining a controlled air content in a wide range of concrete types:

  • Normal mix designs.
  • Low slump concrete.
  • Concrete containing high carbon content fly ash.
  • Concrete containing large amounts of fine materials.
  • Concrete using high-alkali cements.
  • High temperature concrete.
  • Concrete with extended mixing times.

FEATURES

  • Increased freeze / thaw resistance.
  • Reduced permeability – increased water tightness.
  • Reduced segregation and bleeding.
  • Improved plasticity and workability.
  • Greatly improved stability of air entrainment.
  • Ready to use – solution is at optimum strength for accurate dispensing.

PACKAGING

RB-AE is available in 220 kg drums and 20 kg gallons.

TECHNICAL SPECIFICATIONS

 

Physical state: liquid

Density: Approximately 1kg/m3

Chloride content: according to standard

Color: light brown

STANDARDS

ASTM C-260-86

AASHTO M-154 CRD-C 1377

BS 5075: Part 2

DIN 1048 Part 1

DOSAGE

There is no standard dosage rate for RB-AE admixture. The exact quantity of air-entraining admixtures needed should be determined by trial mixes. Factors are: temperature, cement, sand grading, sand-aggregate ratio, slump, means of conveying and placement, use of extra fine materials such as fly ash and micro silica.

The amount of RB-AE admixture used will depend upon the amount of entrained air required under actual job conditions. In a trial mix, use 60 gr to 400 gr per 100kg of cement and adjust in the light of results obtained. In mixes containing water-reducing, set-controlling admixtures, the amount of RB-AE needed is somewhat less than the amount required in plain concrete.

An increase in the amount of sand in concrete leads to an increase in air entraining.

An increase in the amount of cement in concrete leads to reduce in air entraining.

Organic impurity reduce the effectiveness of RB-AE.

Increasing the concrete temperature reduce the effectiveness of RB-AE.

When using RB-AE, avoid excessive vibration.

DIRECTION FOR USE

When two or more admixtures are used, they must be added to the mix separately (through dispensers or manually) and must not be mixed with each other prior to adding to the concrete mix. For optimum, consistent performance, the air- entraining admixture should be dispensed on damp, fine aggregate.

In presence of water reducing agents, the amount of air entraining is lower than that used for normal concrete (0.1-0.5 cement wt %)

STORAGE

RB-AE admixture should be stored and dispensed at 2°C or higher. Although freezing does not harm this product, precautions should be taken to protect it from freezing. If it freezes, thaw and reconstitute by mild mechanical agitation. Do not use pressurised air for agitation. Shelf life is 12 months when stored as above.

SAFETY

RB-AE contains no hazardous substances requiring labelling. For further information refer to the Material Safety Data Sheet.

 

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