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SikaPlast®-170

Superplasticizing admixture for precast concrete

SikaPlast®-170 is a polycarboxylate based superplasticizer particularly formulated for the production of precast concrete elements, targeting its special demands regarding slump retention, very low water/binder ratios, use of double or triple blend mixes (cement, GGBFS, PFA and/or microsilica) and a high degree of compaction. Suitable for use in hot and tropical climatic conditions.

SikaPlast®-170 acts by surface absorption on the cement particles producing steric hindrance as well as electrostatic repulsion between the binder particles resulting in:
  • Easier control during casting due to sufficient retention period and high early strength development
  • High water reduction (leading to high density and strength) even in double or triple blend mixes (e.g. cement, GGBS, and silica fume)
  • Low w/b ratio leads to very low water permeability and chloride migration
  • High early strength and strength development even with the use of low cement content mixes
  • Improved shrinkage and creep behavior
  • Excellent flow ability resulting in minimal placing and compacting efforts
  • Does not contain chlorides or other steel corrosion promoting ingredients so may be used for reinforced and pre-stressed concrete construction
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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®-170 acts by surface absorption on the cement particles producing steric hindrance as well as electrostatic repulsion between the binder particles resulting in:
  • Easier control during casting due to sufficient retention period and high early strength development
  • High water reduction (leading to high density and strength) even in double or triple blend mixes (e.g. cement, GGBS, and silica fume)
  • Low w/b ratio leads to very low water permeability and chloride migration
  • High early strength and strength development even with the use of low cement content mixes
  • Improved shrinkage and creep behavior
  • Excellent flow ability resulting in minimal placing and compacting efforts
  • Does not contain chlorides or other steel corrosion promoting ingredients so may be used for reinforced and pre-stressed concrete construction

Packaging

1000 L flowbin. Bulk supply in tanker trucks possible on request

Colour

Brownish liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

SikaPlast®-170 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

~1.04 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®-170 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®-170 may be combined with all types of Portland cement (OPC and SRC), 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, Sika® WT-10
We recommend to perform trial mixes to establish the required performance when combining SikaPlast®-170 with the above products or other admixtures. Please consult our Sika Technical Department.

Dispensing

SikaPlast®-170 is added to the gauging water or simultaneously poured with it into the concrete mixer at the batching plant.
Do not add SikaPlast®-170 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.
Consumption

Recommended Dosage

0.5 - 2.8 % by weight of binder.
Dosages outside this range may 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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