Product Data Sheet Show all documents

SikaControl®-40

Shrinkage reducing admixture

SikaControl®-40 is a liquid shrinkage reducing admixture used to produce high performance concrete with greatly reduced drying shrinkage.

SikaControl®-40 increases cohesion within the concrete pore system. Thus the contraction caused by water loss is reduced which results in significantly reduced drying shrinkage and therefore shrinkage cracking in correctly designed concrete mixes and structures. With the application of SikaControl®-40 the following advantages can be achieved:
  • Reduced drying shrinkage
  • Reduced drying shrinkage cracking
  • Reduced potential of slab curling
  • Reduced permeability
  • Increased concrete durability
SikaControl®-40 does not contain chlorides or any other ingredients which promote the corrosion of steel. It is therefore suitable for use in reinforced and prestressed concrete structures.
Product Data Sheet Show all documents

Usage

SikaControl®-40 is used for the production of high performance concrete with greatly reduced drying shrinkage, so that the durability of the concrete structure is significantly improved.
SikaControl®-40 is mainly used for the following applications:
  • Structures with strict demands regarding the limitation of crack width
  • In concrete where low drying shrinkage is important
  • In situ concrete floors where reduced shrinkage minimizes risk of cracking for the same joint spacing, which therefore allows wider joint spacing without increasing the risk of shrinkage cracking
  • In thin bonded topping slabs, to minimize the difference in shrinkage from the existing substrate
  • In concrete elements which are restrained against shrinkage
  • Concrete in marine environments for enhanced durability
  • Watertight and water retaining concrete structures
 

Advantages

SikaControl®-40 increases cohesion within the concrete pore system. Thus the contraction caused by water loss is reduced which results in significantly reduced drying shrinkage and therefore shrinkage cracking in correctly designed concrete mixes and structures. With the application of SikaControl®-40 the following advantages can be achieved:
  • Reduced drying shrinkage
  • Reduced drying shrinkage cracking
  • Reduced potential of slab curling
  • Reduced permeability
  • Increased concrete durability
SikaControl®-40 does not contain chlorides or any other ingredients which promote the corrosion of steel. It is therefore suitable for use in reinforced and prestressed concrete structures.

Packaging

20 litre drums, 1000 llitre IBC

Colour

Reddish liquid

Product Details

Product Information

Chemical Base

Hydroxyl combination

Shelf Life

12 months shelf life from date of production if stored properly in undamaged, unopened, original sealed packaging.

Storage Conditions

Storage at temperatures between 5 °C and 30 °C in a dry area. Protect from direct sunlight, frost and contamination.

 

Density

~1.0 kg/l (at +20°C)

pH-Value

~11.5

Total Chloride Ion Content

<0.10% (chloride-free)

Equivalent Sodium Oxide

<0.1%
Technical Information

Concreting guidance

The standard rules of good concreting practice, concerning production as well as placing, are to be followed.
Laboratory trials shall be carried out before concreting on site, especially when using a new mix design or producing new concrete components.
Fresh concrete must be cured properly and curing applied as early as possible.

Effect on Setting

The application of SikaControl®-40 will result in retarded setting of the concrete and in cold ambient temperatures this effect will be increased.
When combining SikaControl®-40 with retarding admixtures, their combined retardation effect and the delay in setting time has to be taken into account.

Application

Application Information

Compatibility

SikaControl®-40 may be combined with many other Sika products.
Note:
Always conduct trials before combining products in specific mixes and contact our technical service for more information and advice.

Dispensing

SikaControl®-40 is added to the gauging water or added with it into the concrete mixer.
Consumption

Recommended Dosage

0.5 - 3.0% by weight of cement

Note: Application at higher dosages will increase the retardation effects.

Admixture

W/C ratio     

Consistence    

28 day Compressive strengths  

Shrinkage compared to control mix @ 28 days

Control

0.588

80mm

55.0N/mm2

 -

SikaControl®-40 @ 3%

0.588

80mm

54.0N/mm2

65%

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