Product Data Sheet Show all documents

SikaPlast®-258 VN

PCE BASED SUPERPLASTICIZING AND SET RETARDING CONCRETE ADMIXTURE.

SikaPlast®-258 VN is a 3rd generation polymer based high performance superplasticizer for producing soft consistency concrete. SikaPlast®-258 VN meets the requirements of ASTM C 494 Type D & G. SikaPlast®-258 VN conforms to Type G when used at 0.8 - 1.0% dosage, depending on cement type used.

SikaPlast®-258 VN combines different modes of actions. By adsorption on the surface of the fines and keeping them apart while the hydration is in progress, SikaPlast®-258 VN effects the following concrete properties:
  • Improve mortar phase when using coarse sand.
  • Long slump keeping and high water reduction.
  • High flowability (considerably reduced placing and compacting work).
  • Faster evolution of early strength development.
  • Workability can be maintained over 3 hours (still depends on admixture dosage, cement type, temperature).
  • Improved creep and shrinkage resistance characteristics.
  • When used at higher dosages, SikaPlast®-258 VN can give extended working time.
Product Data Sheet Show all documents

Usage

SikaPlast®-258 VN is mainly suitable for the manufacture of concrete for RMC plants and site batch concrete. SikaPlast®-258 VN is used for the following types of concrete:
  • Bored piles.
  • Barrette foundations and diaphragm walls.
  • Ground and suspended slabs.
  • Columns and walls.
 

Advantages

SikaPlast®-258 VN combines different modes of actions. By adsorption on the surface of the fines and keeping them apart while the hydration is in progress, SikaPlast®-258 VN effects the following concrete properties:
  • Improve mortar phase when using coarse sand.
  • Long slump keeping and high water reduction.
  • High flowability (considerably reduced placing and compacting work).
  • Faster evolution of early strength development.
  • Workability can be maintained over 3 hours (still depends on admixture dosage, cement type, temperature).
  • Improved creep and shrinkage resistance characteristics.
  • When used at higher dosages, SikaPlast®-258 VN can give extended working time.

Packaging

200/1000 litres.

Colour

Liquid/brown colour.

Product Details

Product Information

Chemical base

Modified Polycarboxylate in water.

Shelf life

12 months if stored properly in original unopened packaging.

Storage conditions

Stored in dry conditions, protected from direct sunlight and at temperatures between +5 °C and +30 °C.

Density

1.060 – 1.100 kg/L. (200C).
Technical Information

Concreting Guidance

Concrete placing: With the use of SikaPlast®-258 VN, concrete of highest quality is being produced, however state of the art concrete technology, such as mixing, placing vibrating and curing must be respected and applied.

Curing: Effective measures for concrete curing must be followed.

Application

Application Information

Compatibility

SikaPlast®-258 VN may be combined with all SikaPlast®, Sika® Aer, Sika®Pump, Sikacrete® PP1 products, but must be added separately to the mix and not pre-mixed prior its addition.

SikaPlast®-258 VN is compatible with all Portland Cement types.

DISPENSING

SikaPlast®-258 VN is added to the gauging water prior to its addition to the dry mix or added separately to the wetted concrete mix.

For optimum utilization of the ultra-high range water reducer we recommend a minimum wet mixing time of 60 seconds.

 

When adding the balance of the batching water to adjust concrete consistency this should be done after a minimum of 2/3 of the wet mixing time to avoid surplus water in the concrete.
Consumption

Recommended Dosage

0.5 - 2 ltr per 100 kgs of cement/binder.

Typical 0.8 to 1.2 ltr/100 kgs of cement/binder.

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