Product Data Sheet Show all documents

Sika® ViscoCrete® ACE 456

(former MGlenium ACE 456)

Water reducing and retarding superplasticizing admixture for precast concrete

Sika® ViscoCrete® ACE 456 consists of a range of innovative superplasticizers based on newly developed polycarboxylate ether polymers. The particular molecular configuration of Sika® ViscoCrete® ACE 456 accelerates the cement hydration by exposing increased surface of the cement grains to react with water. As a result, it is possible to obtain earlier development of the heat of hydration, rapid development of the hydration products and, as a consequence, higher strengths at very early age. The polymer structure of Sika® ViscoCrete® ACE 456 is specially designed to improve the rheology of precast concrete, making it very flowable and low viscous even at very low water/cement ratios, without increasing stickiness. Robustness is a distinctive feature of the precast concrete produced with
Sika® ViscoCrete® ACE 456. Suitable for use in hot and tropical climatic conditions.

Sika® ViscoCrete® ACE 456 offer the following benefits for the precast concrete industry:
  • Production of highly flowable, robust self-compacting concrete having a low water cement ratio.
  • Enhanced robustness and consistency in concrete quality with low stickiness.
  • Elimination of heat curing.
  • Improved surface appearance.
  • Durable precast concrete elements as per EN 206-1.
  • Optimization of the curing cycles by reducing curing time or curing temperature.
  • Increased productivity.
  • Sika® ViscoCrete® ACE 456 may be used in combination with Sika® Stabilizer. The technology produces advanced self-compacting concrete, without the aid of vibration. For economic, ecological and ergonomic ready-mix concrete production.
Product Data Sheet Show all documents

Usage

  • Precast concrete structures in general
  • Precast concrete tunnel segments
  • Pre-stressed concrete elements
  • Post-tensioned concrete bridge segments
  • Fiber Reinforced Concrete (FRC) containing steel, synthetic and or polypropylene fibers
  • Low w/b ratio concrete requiring high workability, slump retention and high early strength development
  • Self compacting concrete
 

Advantages

Sika® ViscoCrete® ACE 456 offer the following benefits for the precast concrete industry:
  • Production of highly flowable, robust self-compacting concrete having a low water cement ratio.
  • Enhanced robustness and consistency in concrete quality with low stickiness.
  • Elimination of heat curing.
  • Improved surface appearance.
  • Durable precast concrete elements as per EN 206-1.
  • Optimization of the curing cycles by reducing curing time or curing temperature.
  • Increased productivity.
  • Sika® ViscoCrete® ACE 456 may be used in combination with Sika® Stabilizer. The technology produces advanced self-compacting concrete, without the aid of vibration. For economic, ecological and ergonomic ready-mix concrete production.

Packaging

Drum, 1000 L flowbin or bulk supply in tanker

Colour

Clear to light brown liquid

Product Details

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

Sika® ViscoCrete® ACE 456 follows the requirements of ASTM C494; Type F 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

~1.06 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® ACE 456 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® ACE 456 is a liquid admixture to be added to the concrete during the mixing process. The best results are obtained when the admixture is added to the mixing water that is used for the concrete mix after all the other components are already in the mixer and after the addition of at least 80% of the total water. The water content is adjusted to obtain the desired consistence or workability. Optimal water reduction is obtained if the Sika® ViscoCrete® ACE 456 is poured into the concrete mix right after the addition of the initial 80-90% of mixing water. Avoid adding the admixture to the dry aggregates. After adding Sika® ViscoCrete® ACE 456 admixture provide enough mixing time to secure a homogenous dispersion. Continue mixing and adjust the water content to obtain the required workability.

Compatibility

Sika® ViscoCrete® ACE 456 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® ACE 456 with the above products or other admixtures. Please consult our Sika Technical Department.

 
Consumption

Recommended dosage

0.3 - 2.0 % by weight of binder
Other 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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