Product Data Sheet Show all documents

Sikament® NNR

SUPERPLASTICIZER / HIGH RANGE WATER-REDUCER

Sikament® NNR is a highly effective admixture for concrete especially suitable for the production of free flowing concrete and for the production of high strengths concrete, especially in hot climatic conditions.

Sikament® NNR provides the following properties:
As superplasticizer :
  • Workability is greatly improved.
  • Increase place ability in slender components with densely packed reinforcement.
  • Enables easy placing, less vibration needed.
  • Good slump keeping effect.
As high range water-reducer :
  • Up to 25% of water reduction.
  • Pronounced increase of final strengths.
  • Reduced permeability for water.
Product Data Sheet Show all documents

Usage

Sikament® NNR acting as superplasticizer or as high range water-reducer, promotes a very high plasticity and good slump keeping properties to concrete. Sikament® NNR is mainly used for the following applications:
  • Concrete with strong fluidity.
  • High quality concrete.
  • Concrete submitted to long transportation, delayed placing and high temperatures.
  • Concrete with high water reduction while maintaining favourable consistency enabling good early strength development.
 

Advantages

Sikament® NNR provides the following properties:
As superplasticizer :
  • Workability is greatly improved.
  • Increase place ability in slender components with densely packed reinforcement.
  • Enables easy placing, less vibration needed.
  • Good slump keeping effect.
As high range water-reducer :
  • Up to 25% of water reduction.
  • Pronounced increase of final strengths.
  • Reduced permeability for water.

Colour

Dark Brown Liquid

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

Complies with ASTM C 494 type G and EN 934-2 Table 11.1 and11.2

 
Product Information

Composition

Based on naphthalene formaldehyde sulphonate

Shelf life

12 months minimum from production date if stored in undamaged and unopened, original sealed packaging, in dry conditions at temperatures between +5 and +35 ºC.

Storage conditions

Store in a dry area between 5ºC and 35ºC. Protect from direct sunlight.

Density

1.20 ± 0.015

pH-Value

8.5 ± 1

Total chloride ion content

< 0.1%

Equivalent sodium oxide

< 1.5 %

Application

Application Information

Dispensing

Sikament® NNR is added to the gauging water or can be added separately to the freshly mixed concrete. In this case, further mixing should take place for at least one minute per cubic meter.


Sikament® NNR can also be added to the concrete immediately prior to discharge and after further mixing has taken place for at least five more minutes.
Consumption

Recommended dosage

0.4 – 3.0 % by weight of cement, depending on the requested performance of the concrete.

Usual dosage : 0.5 - 2.0 % by weight of cement.

It is advisable to carry out trial mixes to establish the exact dosage rate required
Application steps

APPLICATION INSTRUCTIONS

Sikament® NNR allows the production of high performance concrete, as long as the composition is well design and standard rules of good concreting practice are followed (production as well as placing).
Fresh concrete must be cured properly and as early as possible especially in hot climatic conditions in order to prevent plastic and drying shrinkage.

  • We recommend previous tests to determine the correct dosage of the admixture and whenever concrete composition is changed.

  • When accidental overdosing occurs, the set retarding effect increases. During this period the concrete must be kept moist in order to prevent premature drying out.
  • For further details contact our Technical Department.

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