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Structuro 312 - Superplasticising admixture for flowable concretes and early strength

Liquid superplasticising admixture for flowable concretes with extended workability time and good early strength.

Usage: 0.2 - 2% by weight of cement.

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Admixture for concrete with high water-reducing power without loss of workability and performance. It allows the production of high flowing concretes.

Uses

  • Pumping concrete.
  • Suitable for making self-compacting and self-levelling concrete.
  • Architectural concrete.
  • Precast concrete.

Advantages

  • Allows the production of extremely fluid concrete for use on site without the need for vibration.
  • Significant improvement in both initial and final mechanical resistance.
  • High water-reducing power.
  • Provides a stable and very homogeneous concrete.
  • Prolongs the workability time of the concrete.

Standards

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 should be determined by tests using the materials and conditions with which it will be tested in practice. The dosage may vary between 0.3 and 2.0% s.p.c., bearing in mind that maximum dosage may cause setting delays.

For self-compacting concrete the average dosage would be about 1%.

For self-levelling concrete the average dosage would be between 1.0 and 1.5%.

Properties

The following results were obtained at a temperature of 20ºC:

  • Appearance: Light brown liquid
  • Density: 1,05 ± 0,01 kg/l
  • pH: 6,5 ± 1,0
  • Water soluble chloride content (CI-): ≤ 0,10%.
  • Alkali content (Na2O equivalent): max. 2% by mass
  • Primary function: To increase workability
  • Secondary function: Increase early and late strengths

Mode of use

Mix design

After selecting the appropriate dosage, care should be taken to ensure the consistency of the materials used and the mixing and spreading processes.

Compatibility

Compatible only with the superplasticisers of the Fosroc Euco range if the lowest possible w/c ratio is to be maintained. If more than one admixture is used, they should be added to the concrete separately and not mixed together before being added. The resulting properties of concrete containing more than one admixture should be checked by prior testing.

Structuro 312 is suitable for use with all cements complying with RC-08.

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 delayed setting of the concrete as well as additional air entrapment.

Curing

All structural concrete must be properly cured, particularly in situations where overdosage has occurred. A Fosroc Euco Concure type curing membrane, water (sprayed) or wet burlap should be used.

Clean up and disposal

Any spillage of Structuro 312 should be absorbed with sand or earth and transferred to suitable containers. Product residues should be flushed away with a large quantity of water. Disposal of the product and packaging is the responsibility of the end user.

Storage

This additive has a storage period of 12 months if kept in a dry place and in its original and closed containers at a temperature between 2ºC and 40ºC. The colour of the additive may change over time without affecting the properties of the additive.

Precautions

Safety and hygiene

Never ingest or come into contact with skin and eyes. Wear protective gloves and goggles. Splashes on skin 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, please refer to the Material Safety Data Sheet.

Fire

Structuro 312 is water based and non-flammable.

Fosroc

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