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Sika® ViscoCrete®-7750 AE

HIGH RANGE WATER REDUCING / SUPERPLASTICIZING ADMIXTURE FOR CONCRETE

Sika® ViscoCrete®-7750 AE 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®-7750 AE is suitable for use in concrete mixes incorporating pozzolanic materials such as GGBS, PFA and microsilica.
Suitable for use in hot and tropical climatic conditions.

Sika® ViscoCrete®-7750 AE 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.
Sika® ViscoCrete®-7750 AE provides the following beneficial properties:
  • Powerful plasticising action
  • Production of workable concrete at low w/b ratio
  • Improved shrinkage and creep characteristics
  • Excellent flowability results in minimal placing and compacting efforts
  • Slower rate of carbonation ingress
  • Cost effective
  • Higher strengths allows greater flexibility for engineers to design
  • Reduces surface defects, improving aesthetic appearance
  • Durable concrete
  • Does not contain chlorides or other steel corrosion promoting ingredients
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Usage

  • Production of site mixed and ready-mix concrete
  • During hot weather production of concrete with extended 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®-7750 AE 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.
Sika® ViscoCrete®-7750 AE provides the following beneficial properties:
  • Powerful plasticising action
  • Production of workable concrete at low w/b ratio
  • Improved shrinkage and creep characteristics
  • Excellent flowability results in minimal placing and compacting efforts
  • Slower rate of carbonation ingress
  • Cost effective
  • Higher strengths allows greater flexibility for engineers to design
  • Reduces surface defects, improving aesthetic appearance
  • Durable concrete
  • Does not contain chlorides or other steel corrosion promoting ingredients

Packaging

1000 L flowbin or bulk supply in tanker trucks on request

Colour

Brown liquid

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

Sika® ViscoCrete®-7750 AE follows the requirements of ASTM C494; Type G and EN 934-2
Product Information

Composition

Aqueous solution of modified polycarboxylates, 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 +50°C. Mix well before using.

Density

~1.11 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® ViscoCrete®-7750 AE 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® ViscoCrete®-7750 AE is added to the gauging water or simultaneously poured with it into the concrete mixer at the batching plant.
Do not add Sika® ViscoCrete®-7750 AE directly to the dry mix.
For optimum utilization of its high water reduction property we recommend thorough mixing. 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® ViscoCrete®-7750 AE is suitable for mixes containing all types of cement and supplementary cementitious materials such as: Microsilica (Silica Fume), Fly Ash (PFA), GGBS (Ground Granulated Blast Furnace Slag) and the following Sika products:
▪ SikaPump®
▪ Sika® FerroGard®
▪ SikaFume®
▪ SikaFiber®
▪ Sika® Aer
▪ Sika® Stabilizer
▪ SikaControl®
We recommend to perform trial mixes to establish the required performance when combining Sika® ViscoCrete®-7750 AE with the above products or other admixtures. Please consult our Sika Technical Department.
Consumption

Recommended dosage

0.7 - 1.8 % 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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