Product Data Sheet Show all documents

Sika® Plastiment® PR-850 SA

Water-reducing and retarding concrete admixture

Sika® Plastiment® PR-850 SA (formerly named Plastiment® PR-850*) is a highly effective water reducing agent with controlled retardation over a wide dosage range.
Suitable for use in tropical and hot climatic conditions.

Sika® Plastiment® PR-850 SA provides the following properties:
  • Long slump retention at high concrete temperature
  • Increased setting time in hot weather
  • Reduced water without loss of workability
  • Increased strength
  • Reduced shrinkage and creep
  • Better surface finish
  • Economic
Product Data Sheet Show all documents

Usage

Sika® Plastiment® PR-850 SA is used for producing high quality concrete in applications such as:
  • Ready mixed concrete
  • Fair faced concrete
  • High temperature concreting
  • Difficult placing conditions
  • Long transportation distances
 

Advantages

Sika® Plastiment® PR-850 SA provides the following properties:
  • Long slump retention at high concrete temperature
  • Increased setting time in hot weather
  • Reduced water without loss of workability
  • Increased strength
  • Reduced shrinkage and creep
  • Better surface finish
  • Economic

Packaging

200 L drum
1000 L flowbin
Bulk supply in tanker trucks possible on request

Colour

Dark brown liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Sika® Plastiment® PR-850 SA follows the requirements of ASTM C494; Type D and EN 934-2
Product Information

Composition

Aqueous solution of mixed lignosulphonate and retarders

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.

Specific gravity

~1.070

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 Sika® Plastiment® PR-850 SA 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

Dispensing

Sika® Plastiment® PR-850 SA is added to the gauging water or simultaneously poured with it into the concrete mixer at the batching plant.
Do not add Sika® Plastiment® PR-850 SA directly to the dry mix.
For optimum utilization we recommend thorough mixing at a minimum 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.

Compatibility

Sika® Plastiment® PR-850 SA 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:
Plastiment® ranges;
SikaPump®, Sika® FerroGard®-901, SikaFume®, SikaFiber®, Sika Aer®, Sika® Stabilizer, Sika®-1 WT, Sika® WT-10

Sika® Plastiment® PR-850 SA is not compatible with Sikament® range.
We recommend performing trial mixes to establish the required performance when combining Sika® Plastiment® PR-850 SA with the above products or other admixtures. Please consult our Sika Technical Department.
Consumption

Recommended dosage

0.35 - 1.2 % 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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