Product Data Sheet Safety Data Sheet Show all documents

SikaPlast®-440

Workability enhancing, plasticising admixture

SikaPlast®-440 is a multi-purpose water reducer and plasticizer, utilizing technology unique to the SikaPlast®-400 Series range of products. A range of Ready Mixed concrete plasticisers, specifically designed to produce soft concrete rheology with enhanced workability retention and improved wet concrete cohesion.

Water Reduction: SikaPlast®-440 can be dosed at low to medium quantities to obtain water reduction from 5-18% and will achieve water reduction up to 22% at high dosage rates.
Extended Slump Life and Set Control: SikaPlast®-440 has been formulated to provide controlled and predictable extended slump life for periods of 90 to 120 minutes (depending on dosage) allowing good slump retention without significant loss in early strength development.
The combined high range water reduction and plasticising action of SikaPlast®-440 provides the following benefits in hardened concrete:
  • Higher early compressive strengths for earlier removal of forms and structural use of concrete.
  • Higher ultimate strengths allow for greater engineering design flexibility and structural economies.
  • Reduced water cement ratios produce more durable, dense concrete with reduced permeability.
  • Highly effective plasticiser reduces surface defects in concrete elements and improves aesthetics appearance.
SikaPlast®-440 does not contain formaldehyde, calcium chloride or any other added chlorides and will not initiate or promote the corrosion of steel present in the concrete.  
Product Data Sheet Safety Data Sheet Show all documents

Usage

SikaPlast®-440 may be used in both ready mix and on site batching applications:
  • As a plant added high range water reducer (High dosage range), to provide excellent plasticity, while maintaining slump for ~120 minutes with minimal retardation.
  • As a plant added mid range water reducer (Medium dosage range), forpumped concrete flatwork and applications where superior finishingcharacteristics are required with low retardation levels.
SikaPlast®-440 is ideal for use with lean, harsh concrete mixes, and concrete containing, slag or fly ash.  

Advantages

Water Reduction: SikaPlast®-440 can be dosed at low to medium quantities to obtain water reduction from 5-18% and will achieve water reduction up to 22% at high dosage rates.
Extended Slump Life and Set Control: SikaPlast®-440 has been formulated to provide controlled and predictable extended slump life for periods of 90 to 120 minutes (depending on dosage) allowing good slump retention without significant loss in early strength development.
The combined high range water reduction and plasticising action of SikaPlast®-440 provides the following benefits in hardened concrete:
  • Higher early compressive strengths for earlier removal of forms and structural use of concrete.
  • Higher ultimate strengths allow for greater engineering design flexibility and structural economies.
  • Reduced water cement ratios produce more durable, dense concrete with reduced permeability.
  • Highly effective plasticiser reduces surface defects in concrete elements and improves aesthetics appearance.
SikaPlast®-440 does not contain formaldehyde, calcium chloride or any other added chlorides and will not initiate or promote the corrosion of steel present in the concrete.  

Packaging

200 and 1000 Litre containers

Colour

Brown liquid

Product Details

Product Information

Chemical Base

Aqueous solution of modified polycarboxylates.

Shelf Life

12 months from date of production

Storage Conditions

Store properly in undamaged unopened, original sealed packaging, in dry conditions at temperatures between +5°C and +25°C. Protect from direct sunlight and frost.

 

Density

1,11 kg/litre

pH-Value

7.0 +/- 0.5
Technical Information

Concreting Guidance

The standard rules of good concreting practice concerning production and placing are to be followed.
Fresh concrete must be cured properly and as early as possible.

Application

Application Information

Dispensing

SikaPlast®-440 is added to the gauging water or simultaneously with it poured into the concrete mixer. For optimum utilisation of the high water reduction, 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 2/3 of wet mixing time, to avoid surplus water in the concrete.
SikaPlast®-440 can also be added directly to the freshly mixed concrete in the concrete mixer at the end of the batching cycle.
Frozen SikaPlast®-440
Frozen SikaPlast®-440 may be used after it has been slowly thawed at room temperature and intensively mixed.
Combinations with other admixtures
SikaPlast®-440 is highly effective as single admixture or in combination with many admixtures in the Sika System.
Field evaluations are needed to determine, based on local materials, the proper dosage of any combination of admixture used. Please contact your local Sika representative for more information and assistance.
Combinations with cement extenders
SikaPlast®-440 is particularly well suited for use with slag and fly ash because of its water reduction capability with superior slump control and early strength development.

 

Consumption

Recommended Dosage

Dosage rates will vary according to materials used, ambient conditions and the requirements of a specific project.
Full dosage range:
0.4 – 1.4% by weight of cementitious (400 - 1400 ml/100kg cementitious)
Typical dosage range:
0.7 - 1.2 % by weight of cementitious (700 - 1200 ml/100kg cementitious)

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