Product Data Sheet Show all documents

Sika® Plastiment® PR-450

Water-Reducing and Retarding Concrete Admixture

Sika® Plastiment® PR-450 is used as a concrete plasticizer and retarder where high quality concrete is required in difficult climatic conditions. Suitable for use in tropical and hot climatic conditions.

Sika® Plastiment® PR-450 provides the following properties:
  • Long slump retention at high concrete temperature
  • Increased setting time in hot weather
  • Reduced water without loss of workability
  • Increase strength and durability
  • Reduced shrinkage and creep
  • Better surface finish
  • Economic
Product Data Sheet Show all documents

Usage

Sika® Plastiment® PR-450 is used for producing high quality concrete in applications such as:
  • Ready mixed concrete
  • High temperature concreting
  • Difficult placing conditions
  • Reservoirs and dams
  • Sewage works
  • Long transportation distances
 

Advantages

Sika® Plastiment® PR-450 provides the following properties:
  • Long slump retention at high concrete temperature
  • Increased setting time in hot weather
  • Reduced water without loss of workability
  • Increase strength and durability
  • Reduced shrinkage and creep
  • Better surface finish
  • Economic

Packaging

200 L drum and 1000 L flowbin

Bulk supply in tanker trucks is on request

Colour

Brown liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Sika® Plastiment® PR-450 follows the requirements of ASTM C494; Types B and D and EN 934-2
Product Information

Composition

Modified lignosulphonate

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

~1.18 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 Sika® Plastiment® PR-450 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

Sika® Plastiment® PR-450 may be combined with all types of Portland cement and the following Sika products:
  • Sikament® range of superplasticizers
  • SikaPump®
  • Sika Aer®
  • 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

Sika® Plastiment® PR-450 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-450 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.
Consumption

Recommended Dosage

0.3 - 1.0 % 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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