Product Data Sheet Show all documents

Sika® ViscoCrete®-4288 PK

 Concrete Admixture for High Flow/Self-Consolidated Concrete

Sika® ViscoCrete®-4288 PK is a polycarboxylate based superplasticizer developed particularly for use in ready mixed concrete to give extended slump retention and high strength development of normal grade concrete mixes. Sika® ViscoCrete®-4288 PK is suitable for use in concrete mixes incorporating pozzolanic materials such as GGBS, PFA and micro silica. Suitable for use in hot and tropical climatic conditions.

Sika® ViscoCrete®-4288 PK acts by surface absorption on the cement particles producing steric hindrance as well as electrostatic repulsion between cement particles which results in higher dispersion, flow and retention. Sika® ViscoCrete®-4288 PK provides the following beneficial properties:
  • Powerful plasticizing action
  • Production of workable concrete at low w/b ratio
  • Improved shrinkage and creep characteristics
  • Excellent flowability resulting in minimal placing and compacting efforts
  • Slower rate of carbonation ingress
  • Cost effective, structurally economic
  • Higher ultimate strengths allow greater flexibility for engineers to design
  • Reduces surface defects so improving aesthetic appearance.
  • Durable concrete
  • Does not contain chlorides or other steel corrosion promoting ingredients
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Product Data Sheet Show all documents

Usage

  • Production of site mixed and ready-mix concrete
  • During hot weather production of concrete with ex-tended transportation or placing times
  • Concrete with low water / cement ratio
  • Concrete placement in congested steel reinforcement
  • Self-compacting concrete
  • Slim elements requiring a high standard of surface finish
  • High performance / high strength concrete  

Advantages

Sika® ViscoCrete®-4288 PK acts by surface absorption on the cement particles producing steric hindrance as well as electrostatic repulsion between cement particles which results in higher dispersion, flow and retention. Sika® ViscoCrete®-4288 PK provides the following beneficial properties:
  • Powerful plasticizing action
  • Production of workable concrete at low w/b ratio
  • Improved shrinkage and creep characteristics
  • Excellent flowability resulting in minimal placing and compacting efforts
  • Slower rate of carbonation ingress
  • Cost effective, structurally economic
  • Higher ultimate strengths allow greater flexibility for engineers to design
  • Reduces surface defects so improving aesthetic appearance.
  • Durable concrete
  • Does not contain chlorides or other steel corrosion promoting ingredients

Packaging

05 ltr jerry can

20 ltr plastic can

200 ltr drum

1000 ltr IBC

Bulk supply in tanker is possible on demand

Colour

Pale to Brown

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Sika® ViscoCrete®-4288 PK follows the requirements of ASTM C494; Type G and EN 934-2.
Product Information

Chemical Base

Aqueous solution of modified polycarboxylates, co-polymers

Shelf Life

12 months minimum from production date if stored properly in

original unopened packaging

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.

pH-Value

≥4

Total Chloride Ion Content

Nil (EN 934-2)

Specific gravity

1.15 ± 0.03
Technical Information

Concreting Guidance

The standard rules of good concreting practice for production and placing must be observed when using Sika® ViscoCrete®-4288 PK 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® ViscoCrete®-4288 PK is added to the gauging water or simultaneously poured with it into the concrete mixer at the batching plant. Do not add Sika® ViscoCrete®-4288 PK 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 30 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.

Dispensing

Sika® ViscoCrete®-4288 PK 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:

  • SikaPump®
  • Sika® FerroGard®-901
  • SikaFume®
  • SikaFiber®
  • Sika® AER
  • Sika® Stabilizer
  • Sika®-1 WT
  • We recommend performing trial mixes to establish the required performance when combining  Sika® ViscoCrete®-4288 PK with the above products or other admixtures. Please consult our Sika Technical Department.
Consumption

Recommended Dosage

  • For soft plastic concrete 0.2 – 0.4% by weight of binder.
  • For flowing and self-compacting concrete 0.4 – 1.5% by weight of binder
  • Higher dosages up to 1.7 % 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.
Application steps

CLEANING OF TOOLS

Clean all equipment and tools with water immediately

after use.

 

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