Product Data Sheet Show all documents

SikaPlast®-222 PC

CONCRETE ADMIXTURE FOR PRECAST CONCRETE

SikaPlast®-222 PC is a third generation polycarboxylate based superplasticizer for concrete. It has been particularly developed for use in precast concrete to give extended slump retention and high early strength development of concrete mixes. SikaPlast®-222 PC is suitable for use in concrete mixes containing microsilica and other pozzolanic materials such as GGBS and fly ash. Suitable for use in hot and tropical climatic conditions.

SikaPlast®-222 PC acts by surface absorption on the cement particles producing sterical hindrance as well as electrostatic repulsion between cement particles which results in higher dispersion, flow and retention. SikaPlast®-222 PC provides the following beneficial properties:
  • Increased working time
  • Early strength development resulting in economic stripping time for pre-cast and in cast-situe concrete
  • High water reduction resulting in high density, high strength and reduced water permeability
  • Excellent plasticizing effect giving improved flowability, placing and compaction behavior
  • Improved surface finish
  • Better shrinkage and creep behaviour
  • Low risk of segregation
  • Reduces energy costs for steam cured pre-cast elements
  • Does not contain chlorides or other steel corrosion promoting ingredient
Product Data Sheet Show all documents

Usage

  • Precast concrete structures in general
  • Precast concrete tunnel segments
  • Pre-stressed concrete elements
  • Post-tensioned concrete bridge segments
  • Fiber Reinforced Concrete (FRC) containing steel, synthetic and or polypropylene fibers
  • Low w/b ratio concrete requiring high workability, slump retention and high early strength development
 

Advantages

SikaPlast®-222 PC acts by surface absorption on the cement particles producing sterical hindrance as well as electrostatic repulsion between cement particles which results in higher dispersion, flow and retention. SikaPlast®-222 PC provides the following beneficial properties:
  • Increased working time
  • Early strength development resulting in economic stripping time for pre-cast and in cast-situe concrete
  • High water reduction resulting in high density, high strength and reduced water permeability
  • Excellent plasticizing effect giving improved flowability, placing and compaction behavior
  • Improved surface finish
  • Better shrinkage and creep behaviour
  • Low risk of segregation
  • Reduces energy costs for steam cured pre-cast elements
  • Does not contain chlorides or other steel corrosion promoting ingredient

Packaging

1000 L flow bin

Colour

Light brown to brown liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

SikaPlast®-222 PC follows the requirements of ASTM C494; Type F and EN 934-2
Product Information

Composition

Aqueous solution of modified polycarboxylates, co-polymers

Shelf life

12 months from date of production if stored properly

Storage conditions

Store in undamaged, unopened, original sealed packaging in dry conditions at temperatures between +5 °C and +45 °C. Protect from direct sunlight and frost

Density

~1.06 kg/l (25 °C)

Total Chloride Ion Content

Nil

(EN 934-2)
Technical Information

Concreting Guidance

The standard rules of good concreting practice for production and placing must be observed when using SikaPlast®-222 PC in concrete. Refer to relevant standards.
Fresh concrete must be cured properly especially at high temperatures in order to prevent plastic and drying shrinkage. Use Sika® Antisol® products as a curing agent or apply wet hessian.

Application

Application Information

Compatibility

SikaPlast®-222 PC may be combined with all types of Portland cement, concretes containing pozzolanic materials such as; GGBS, PFA , micro-silica and the following Sika products:
▪ SikaPump®
▪ Sika® FerroGard®-901
▪ SikaFume®
▪ SikaFiber®
▪ Sika Aer®
▪ Sika® Stabilizer
▪ Sika®-1 WT
We recommend to perform trial mixes to establish the required performance when combined with the above products. Please consult our Sika Technical Department.

Dispensing

SikaPlast®-222 PC is added to the gauging water or simultaneously poured with it into the concrete mixer at the batching plant. Do not add SikaPlast®-222 PC0 directly to the dry mix. For optimum utilization of its high water reduction property we recommend thorough mixing at a minimal wet mixing time of 60 seconds. The addition of the remaining gauging water (to fine tune concrete consistency) may only be started after two-thirds of the wet mixing time to avoid surplus water in the concrete.

Restrictions

When using SSikaPlast®-222 PC a mix design must be selected for the local material sources used and trial mixes performed to verify suitability. If frozen and/or if precipitation has occurred, it may only be used after thawing slowly at room temperature and intensive mixing.
SikaPlast®-222 PC should not be added to dry cement. Before pouring, suitability tests on the fresh concrete must be carried out. Due to the extended workability take special care that formwork is properly installed and secured. In case the setting time of concrete is extended,
if cured properly, other properties may not be affected and higher ultimate strength is visualized. SikaPlast® products are not compatible with admixtures based on sulfonated napthalene or melamine.
Consumption

Recommended Dosage

0.8 - 2.0 % by weight of binder
Higher dosages by weight of binder can be used depending on the mix design, raw materials, climatic conditions and concrete requirements.
Trial mixes must be performed to establish the exact dosage rate required.

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