Sika® ViscoCrete® ACE 8111

HIGH RANGE WATER REDUCING ADMIXTURE

Sika® ViscoCrete® ACE 8111 is high range water reducing admixture, based on chains of modified polycarboxlylate ether technology which has higher performance than melment based. The chemistry of Sika® ViscoCrete® ACE 8111 what differentiates from the traditional high range water reducing with good workability is a new, unique mechanism of action that greatly improves the effectiveness of cement dispersion. Traditional high range water reducing like melamine and naphthalene sulfonates are based on polymers, which are absorbed by the cement granules. They wrap around the granules surface areas at the very early stage of the concrete mixing process. The sulphonic groups of the polymer chains increase the negative charge of the cement particle surface and disperse these particles by electrical repulsion. This electrostatic mechanism causes the cement paste to disperse and has the positive consequence of requiring less mixing water to obtain a given concrete workability. Hydration however starts as soon as the cement particles get in contact with mixing water. The rapid growth of hydration crystals will change the surface mechanical of the particles and thus of set the free dispersion of them. At the beginning of the mixing process, it initiates the same electrostatic dispersion mechanism as the traditional high range water reducing, but the side chains linked to the polymer backbone generate a steric hindrance, which greatly stabilises the cement particles ability to separate and disperse. With this process, flowable concrete with greatly reduced water content is obtained. The mechanism allows obtaining, compared to traditional high range water reducing admixtures, considerably reduction of mixing water content and higher early strengths.  

  • High workability for short placement, saves times and labor.
  • High water reduction for high impermeability and strength.
  • Superior cohesion for no segregation even at high workability, Excellent concrete quality.
  • High early strength for early demolding, shorter strength steam curing cycles.
  • High elastic modulus for superior load bearing capacity.
  • Low shrinkage for better dimensional stability and creep.
 
Product Data Sheet Show all documents

Overview

Usage

  • Production of load bearing precast elements (e.g. bridge girders, piles, concrete housing)
  • High slump concrete for precast concrete
  • Low slump concrete
  • Structures constructed using travelling forms and slip forms
  • Hot weather concreting
  • In-situ casting of structural elements
  • Add on admixture for applications of Watertight or Integral Waterproofing Concrete

Advantages

  • High workability for short placement, saves times and labor.
  • High water reduction for high impermeability and strength.
  • Superior cohesion for no segregation even at high workability, Excellent concrete quality.
  • High early strength for early demolding, shorter strength steam curing cycles.
  • High elastic modulus for superior load bearing capacity.
  • Low shrinkage for better dimensional stability and creep.
 

Packaging

205 L drums (non-returnable)

1 000 L bulk delivery

Product Details

Composition

Aqueous solution of modified polycarboxylate copolymers

Shelf life

12 months from date of production if stored properly in undamaged, unopened, original sealed packaging.

Storage conditions

Store in dry conditions at temperatures between +10 °C and +35 °C. Protect from direct sunlight and frost.

Concreting guidance

The standard rules of good concreting practice, concerning production and placing, are to be followed.

Laboratory trials before concreting on site are strongly recommended when using a new mix design or producing new concrete components. Fresh concrete must be cured properly and as early as possible.

Application

Compatibility

Sika® ViscoCrete® ACE 8111 may be combined with the following products:

  • Sika® Plastiment®
  • SikaFume®
  • SikaFiber®
  • Sika® Stabilizer

Do not use viscocrete or viscoflow series combined with sikament series.

To produce flowing and or self-compacting concrete, special concrete mix design is required. Pre-trials are recommended and mandatory if combinations with the above products are required.

Please consult to our Technical Service Department.

DISPENSING

Sika® ViscoCrete® ACE 8111 is a ready-to-use admixture to be added to the concrete mix as a separate component. Optimal mixing water reduction is obtained if Sika® ViscoCrete® ACE 8111 is poured into the concrete mix right after the addition of the mixing water. Avoid adding the admixture to the dry aggregates.

Recommended dosage

0.6 – 2.0 L per 100 Kg of cementitious.

Other dosages may also be used depending on the specific working conditions. Trial mixes should be made with job materials to determine the optimum dosage required for a specified job requirement.

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