Product Data Sheet Show all documents

SikaPlast®-3850

WATER REDUCING AND RETARDING SUPERPLASTICIZING ADMIXTURE FOR CONCRETE

SikaPlast®-3850 is a polycarboxylate based superplasticizer developed particularly for use in ready mixed concrete to give extended slump retention and high strength development of normal grade concrete mixes. SikaPlast®-3850 is suitable for use in concrete mixes incorporating pozzolanic materials such as GGBS, PFA and microsilica. Suitable for use in hot and tropical climatic conditions.

SikaPlast®-3850 acts by surface adsorption on the cement particles producing steric hindrance as well as electrostatic repulsion between the binder particles which results in higher dispersion, flow and retention. SikaPlast®-3850 provides the following beneficial properties: ▪ Substantial improvement in workability without increased water ▪ Low risk of segregation ▪ Normal set without retardation (within the dosage limit) ▪ Improved density and surface finish ▪ Improved water tightness ▪ Excellent solution for continuous concrete casting of deep elements ▪ Does not contain chlorides or other steel corrosion promoting ingredients
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Product Data Sheet Show all documents

Usage

  • Ready mixed concrete
  • High flow concrete
  • Concrete with high water reduction
  • Slabs
  • Foundations
  • Walls
  • Columns and piers
  • Piles
  • Pre-stressed concrete
  • Bridges and cantilever structures
 

Advantages

SikaPlast®-3850 acts by surface adsorption on the cement particles producing steric hindrance as well as electrostatic repulsion between the binder particles which results in higher dispersion, flow and retention. SikaPlast®-3850 provides the following beneficial properties: ▪ Substantial improvement in workability without increased water ▪ Low risk of segregation ▪ Normal set without retardation (within the dosage limit) ▪ Improved density and surface finish ▪ Improved water tightness ▪ Excellent solution for continuous concrete casting of deep elements ▪ Does not contain chlorides or other steel corrosion promoting ingredients

Packaging

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

Colour

Brown liquid

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

SikaPlast®-3850 follows the requirements of ASTM C494; Type G 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 +50 °C. Mix well before use.

Density

~1.07 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®-3850 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®-3850 is suitable for mixes containing all types of cement and supplementary cementitious materials such as: Microsilica (Silica Fume), Fly Ash (PFA), GGBS (ground granulated blast furnace slag) and the following Sika products:
▪ SikaPump®
▪ Sika® FerroGard®
▪ SikaFume®
▪ SikaFiber®
▪ Sika® Aer
▪ Sika® Stabilizer
▪ SikaControl®
We recommend to perform trial mixes to establish the required performance when combining SikaPlast®-3850 with the above products or other admixtures. Please consult our Sika Technical Department.

Dispensing

SikaPlast®-3850 is a ready-to-use admixture to be added to the concrete as a separate component. Optimal result is obtained if SikaPlast®-3850 is poured into the concrete mix right after the addition of the first 80 % of the mixing water, i.e. when all solids are wetted. Avoid adding the admixture to the dry aggregates.
Consumption

Recommended dosage

0.5–2.0 % 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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