Product Data Sheet Show all documents

SikaTard® ET

SET-RETARDING ADMIXTURE

SikaTard® ET is a set-retarding admixture that can be used for each type of concrete, screeds or mortars. SikaTard® ET - complies with ASTM C 494 type B

On fresh concrete
  • It improves the workability even though the quantity of mixing water is reduced
  • It shifts the beginning of the cement hydration; the setting times are delayed and the consistence of the concrete can be extended. It preserves the fluidity during the period of time required for placing concrete
  • It delays and spreads the release of heat due to cement hydration.
On hardened concrete
  • It improves the mechanical strengths
  • It increases the compactness and watertightness
  • It reduces the shrinkage and creeping
Improvement of mechanical strength:
  • Water reduction from 10 to 15%.
  • Sikatard® ET increases concrete mechanical strength for long- term from 20 to 30%.
  • It also improves its compaction.
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Product Data Sheet Show all documents

Usage

Concreting during hot weather The set-retarding effect of SikaTard® ET avoids a sudden rise in concrete temperature during setting and makes its use absolutely necessary
  • When the temperature is high,
  • In the case of great-mass concretes: dams, etc.
Concreting rework The long set retardation SikaTard® ET can cause makes it possible to rework concreting after it has been discontinued for several hours without any other precaution than a protection against drying. Long-duration concrete transport The use of SikaTard® ET allows trouble-free transportation of any concretes over long distances in any conditions (temperatures, risk of traffic jam) Improvement of the workability SikaTard® ET acting as a retarding plasticizer can be used for placing any types of concrete and more especially:
  • When a greater workability is required
  • For pumped concrete
  • For as-stripped concrete (architectonic aspect)
 

Advantages

On fresh concrete
  • It improves the workability even though the quantity of mixing water is reduced
  • It shifts the beginning of the cement hydration; the setting times are delayed and the consistence of the concrete can be extended. It preserves the fluidity during the period of time required for placing concrete
  • It delays and spreads the release of heat due to cement hydration.
On hardened concrete
  • It improves the mechanical strengths
  • It increases the compactness and watertightness
  • It reduces the shrinkage and creeping
Improvement of mechanical strength:
  • Water reduction from 10 to 15%.
  • Sikatard® ET increases concrete mechanical strength for long- term from 20 to 30%.
  • It also improves its compaction.

Packaging

  • 1,000 L IBC
  • 200 L drum
  • 20 L pails

Colour

Light Brown

Product Details

Product Information

Shelf life

36 months in original unopened packaging

Storage conditions

Store in a dry area in original packaging at temperatures between 5°C and 35°C. Protect from direct sunlight and frost.

Density

 1.09 ± 0.03 kg/l

pH-Value

8.5 ± 1

Total chloride ion content

≤ 0.1 %

Equivalent sodium oxide

≤ 3.0 %
 

Application

Application Information

Dispensing

SikaTard® ET is added in the gauging water or simultaneously poured with it in the concrete mixer.
Consumption

Recommended dosage

From 0.4 to 1% by weight of cement, depending on the required effect.

  • Usual dosage : 0.4 to 0.7%
  • The dosage of 1% may be exceeded when setting has to be slowed for a long time.

Tests must be made with various contents under site conditions (especially the temperature) so as to determine the content needed to obtain the required result.

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