Product Data Sheet Show all documents

SikaPlast®-400 UB

Mid-Range Water Reducing and Retarding Concrete Admixture

SikaPlast®-400 UB is a third generation polycarboxylate based superplasticizer for concrete. It has been particularly developed for use in ready mixed concrete to give extended slump retention and high strength development of normal grade concrete mixes.
SikaPlast®-400 UB is suitable for use in concrete mixes containing microsilica and other pozzolanic materials such as GGBS and fly ash.
Suitable for use in hot and tropical climatic conditions.

SikaPlast®-400 UB acts by surface adsorption on the cement particles producing steric hindrance as well as electrostatic repulsion between cement particles which results in higher dispersion, flow and retention. SikaPlast®-400 UB 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 therefore may be used for reinforced and pre-stressed concrete construction
Product Data Sheet Show all documents

Usage

SikaPlast®-400 UB facilitates extreme water reduction, excellent flow ability with optimum cohesion and impressive slump retention characteristics.
SikaPlast®-400 UB is used for the following types of concrete:
  • Foundations
  • Piles
  • Columns and piers
  • Walls
  • Slabs
  • Bridges and cantilever structures
  • Pre-stressed concrete 
 

Advantages

SikaPlast®-400 UB acts by surface adsorption on the cement particles producing steric hindrance as well as electrostatic repulsion between cement particles which results in higher dispersion, flow and retention. SikaPlast®-400 UB 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 therefore may be used for reinforced and pre-stressed concrete construction

Packaging

1000 L flowbins

Colour

Brown liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

SikaPlast®-400 UB follows the requirements of ASTM C494; Type G and EN 934-2
Product Information

Composition

Aqueous solution of modified poly-carboxylates, 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 +45°C. Protect from direct sunlight and frost

Density

~1.05 kg/l

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®-400 UB 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

SikaPlast®-400 UB is added to the gauging water or simultaneously poured with it into the concrete mixer at the batching plant.
Do not add SikaPlast®-400 UB directly to the dry mix.
For optimum utilization of its high water reduction property 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 two-thirds of the wet mixing time to avoid surplus water in the concrete.

Compatibility

SikaPlast®-400 UB may be combined with all types of Portland cement and the following Sika products:
SikaPump®
Sika® FerroGard®-901
SikaFume®
SikaFiber®
Sika Aer®
Sika® Stabilizer
Sika®-1 WT

SikaControl®-11 WT AE
We recommend to perform trial mixes to establish the required performance when combined with the above products. Please consult our Sika Technical Department.
Consumption

Recommended dosage

0.8 - 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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