Sika® ViscoCrete® ACE 8516

ENGINEERED SUPERPLASTICIZER FOR HIGH EARLY STRENGTH

Sika® ViscoCrete® ACE 8516 is modified poly-carboxylic ether (PCE) based superplasticizer. A specifically formulation active ingredient, designed with Sika® ViscoCrete® ACE 8516 offers excellent dispersion of cement at low water binder ratio and exceptional early strength development. The rapid development of early strength of Sika® ViscoCrete® ACE 8516 allows for zero or minimum application of heating curing processes. The combination of early strength, slump retention and late strength development allows meet demanding Sika® ViscoCrete® ACE 8516 to concreting requirements, often exceeding the performance of conventional superplasticisers. Sika® ViscoCrete® ACE 8516 has a different chemical structure from the traditional superplasticisers. It consists of unique polycarboxylate ether polymer with long lateral chains. This greatly improves cement dispersion. The sulphonic groups of the polymer chains increase the negative charge on the surface of the cement particle and dispersion of the cement occurs by electrostatic repulsion. At the start of the mixing process the same electrostatic dispersion occurs as described previously, but the presence of the lateral chains, linked to the polymer backbone, generate a steric hindrance, which stabilize the cement particles capacity to separate and disperse. This mechanism provides high workability concrete with greatly reduced water demand.   Sika® ViscoCrete® ACE 8516 meets ASTM C494/C494M requirements for Type F and it is also compatible with all cements meeting the ASTM standards.

  • High water reduction capacity over conventional superplasticizers.
  • Superior slump retention, including mid-range slumps.
  • Low permeability and high durability concrete.
  • Flowability for ease of placement and compaction.
  • Optimize curing cycle by shortening curing time or decreasing curing temperature.
  • Eliminate energy required for placing, consolidation and curing.
  • Better rheology properties.
  • Improved surface appearance and concrete quality.
  • High early strength concrete.
Product Data Sheet Show all documents

Overview

Usage

Sika® ViscoCrete® ACE 8516 is especially suitable for concrete used in the construction of precast elements which requires good workability and high early and final strengths, such as:
  • Production of load bearing precast elements (e.g. bridge girders, square piles, concrete housing).
  • Spun pile with less or non-sludge after spinning process.
  • Insitu casting of structural elements.

Advantages

  • High water reduction capacity over conventional superplasticizers.
  • Superior slump retention, including mid-range slumps.
  • Low permeability and high durability concrete.
  • Flowability for ease of placement and compaction.
  • Optimize curing cycle by shortening curing time or decreasing curing temperature.
  • Eliminate energy required for placing, consolidation and curing.
  • Better rheology properties.
  • Improved surface appearance and concrete quality.
  • High early strength concrete.

Packaging

205 L drums (non-returnable)

1 000 L bulk delivery

Product Details

Composition

Modified 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 8516 may be combined with the following products:
▪ 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 8516 is a ready-to-use admixture to be added to the concrete mix. Optimal mixing is obtained if Sika® ViscoCrete® ACE 8516 is poured into the concrete mix right after the addition of the first 80% of the mixing water. Avoid adding the admixture to the dry aggregates. A separate dispenser and feed line must be used.

Recommended dosage

0.5 – 1.5 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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