search

Auracast 295 - Superplasticising additive for very high-strength concretes

Highly active superplasticising water-reducing additive for concrete or reinforced concrete with water-reducing properties.

Estimated consumption: 0.5 - 2.0% by weight of cement.

Container
 

MORE THAN 20 YEARS OF EXPERIENCE

 

SHIPPING IN 48-72 HOURS

 

100% SECURE PAYMENT

Description

Auracast 295 admixture belongs to the new generation admixture group with a high water-reducing power that provides high performance concretes at all ages.

It is particularly suitable for the manufacture of concretes with a low A/C ratio. Used at the same consistency, it allows a strong reduction of mixing water and thus obtains high mechanical strengths in the short and long term. Its hardening accelerating effect is particularly beneficial for formwork stripping at early ages.

Uses

  • Suitable for ready-mixed concrete.
  • Precast concrete where an excellent surface finish is required.
  • Prestressed concrete with high final strengths.
  • Specially designed for precast segmental concretes where high initial strengths are required.
  • Suitable for steam-cured precast concrete.

Advantages

  • High water reducing power.
  • Significant improvement of both initial and final strengths.
  • Provides a very compact concrete with a good external appearance.

Standards

Auracast 295 admixture complies with UNE-EN 934-2:2010 Tables 3.1. and 3.2. as a high activity water reducer / superplasticiser.

Typical dosage

The optimum dosage of Auracast 295 to achieve specific requirements should be determined by tests using the materials and conditions with which it will be tested in practice.

This dosage can range from 0.5% to 2% s.p.c. A dosage of 0.8% by weight of cement can be used as a starting point. For precast tunnel segments or segments, the most suitable dosage is between 0.6% and 1.0% by weight of cement.

Properties

Results were obtained at a temperature of 20ºC:

  • Appearance: Light brown liquid
  • Density: 1,050 ± 0,02 kg/l
  • pH: 6.0 ± 1.0
  • Water soluble chloride content (CI-): ≤ 0,10%.
  • Alkali content (Na2O equivalent): max. 2 % by mass
  • Primary function: Water reduction
  • Secondary function: Increasing initial and final strengths

Mode of use

Mixing design 

Once the appropriate dosage has been selected, care must be taken to ensure the consistency of the materials used and the mixing and distribution processes.

Compatibility

Auracast 295 is compatible only with other additives in the Fosroc Euco range. If more than one admixture is used, they must be added to the concrete separately and not mixed together prior to being added. The resulting properties of concrete containing more than one admixture should be checked by prior testing.

Auracast 295 is suitable for use with all cements complying with RC-08.

Dosing system

The correct amount of Auracast 295 should be measured using a suitable dosing system. For best results, the admixture should be added to the concrete in the mixing water or directly in the mixer.

In this case, increase the setting time. Contact the Fosroc Euco Technical Department for advice on the appropriate dosing equipment and its installation.

Effects of overdosage

An overdosage of twice the maximum dosage indicated may cause segregation of the concrete as well as additional air entrapment.

Curing

The final characteristics of any structural concrete will depend on good curing practice. It is therefore very important to use a Fosroc Euco Concure curing membrane, water spray or wet burlap.

Clean-up and disposal

Spillage of Auracast 295 should be absorbed with sand or earth and transferred to suitable containers. Product residues should be flushed away with large quantities of water. Disposal of the product and packaging is the responsibility of the end user.

Storage

Auracast 295 has a shelf life of 6 months if stored in dry, unopened original containers at a temperature between 2ºC and 40ºC.

Precautions

Safety and Hygiene

Auracast 295 must not be swallowed or come into contact with skin and eyes. Wear protective gloves and goggles. Skin splashes should be washed off with water. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If swallowed, seek immediate medical attention. Do not induce vomiting.

For further information see Material Safety Data Sheet.

Fire

Auracast 295 is water based and non-flammable.

Fosroc

You might also like