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Sikament® RB 945

(former MRheobuild 945)

HIGH RANGE WATER-REDUCING SUPERPLASTICING ADMIXTURE FOR THE PRODUCTION OF RHEOPLASTIC CONCRETE

Sikament® RB 945 is formulated from synthetic polymers specially designed to impart rheoplastic qualities to concrete. A rheoplastic concrete is a fluid concrete with a slump of at least 200 mm, easily flowing, but at the same time free from segregation and having the same water/cement ratio as that of a low slump concrete (25 mm) without admixture. Sikament® RB 945 is suitable for use in hot and tropical climatic conditions.

  • Considerably improves the properties of fresh and hardened concrete
  • Reduced thermal peaks
  • High workability for longer periods
  • Lower pumping pressure
  • Delayed setting with longer workability
  • Higher ultimate strengths
  • Dense concrete, reduced permeability
  • Improved durability of concrete
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Usage

  • Micro silica concrete
  • Mass concrete pours
  • Ready mixed concrete
  • Long-distance concrete pouring
  • Pumpable concrete
  • Casting in hot climates
 

Advantages

  • Considerably improves the properties of fresh and hardened concrete
  • Reduced thermal peaks
  • High workability for longer periods
  • Lower pumping pressure
  • Delayed setting with longer workability
  • Higher ultimate strengths
  • Dense concrete, reduced permeability
  • Improved durability of concrete

Packaging

210 L drum, 1000 L flowbin or bulk supply in tanker

Colour

Dark brown liquid

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

Sikament® RB 945 follows the requirements of ASTM C494; Type A & F, BS EN 934-2
Product Information

Composition

Sulphonated napthalene

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. Mix well before use.

Density

~1.16 kg/l (+25°C)

Total chloride ion content

Nil

(BS EN 934-2)

 
Technical Information

Concreting guidance

The standard rules of good concreting practice for production and placing must be observed when using Sikament® RB 945 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

Sikament® RB 945 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:

  • Sika® Plastiment®
  • SikaPump®
  • Sika®FerroGard®
  • SikaFume®
  • SikaFiber®
  • Sika® Aer
  • Sika®Stabilizer
  • SikaControl®

We recommend to perform trial mixes to establish the required performance when combining Sikament® RB 945 with the above products or other admixtures, Sikament® RB 945 should not be premixed with any other admixtures. If other admixtures are to be used, those should be dispensed separately. Please consult our Sika Technical Department for further assistance.

Dispensing

Sikament® RB 945 is a ready-to-use admixture to be added to the concrete as a separate component. Optimal result is obtained if Sikament® RB 945 is poured into the concrete mix right after the addition of the first 60–70 % of the mixing water, i.e. when all solids are wetted. Avoid adding the admixture to the dry aggregates. 
Consumption

Recommended dosage

Sikament® RB 945 is normally dispensed at a rate of 0.6 – 3.0 Iitres per 100 kg of total binder. Other dosages 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 as per the project requirements.

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