Description

Auramix 353G is a new generation additive with a high water reducing power without loss of workability or performance. It allows the production of high flowing concretes.

Uses

• Specially designed for the manufacture of shotcrete in plant.
• Very versatile additive, suitable for use in synergy.
• For all types of concrete requiring a normal workability period, high initial strength and high performance.
• For the manufacture of shotcrete with high initial and final strengths.

Advantages

• High water reducing power.
• Significant improvement of both initial and final mechanical strengths.
• Provides a stable and robust concrete avoiding large fluctuations in workability when little water is added.
• Allows the production of extremely fluid concrete for use on site without the need for vibration.
• Provides the concrete with excellent workability maintenance.

Standards

Auramix 353G 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 Auramix 353G to achieve specific requirements should be determined by tests using the materials and conditions with which it will be tested in practice.

Typical dosage for shotcrete manufacture is between 0.8 and 1.5% spc, the permissible range for other applications is up to 2% spc.

Properties

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

• Appearance: Light brown liquid
• Density: 1,050 ± 0,01 kg/l
• pH: 7,5 ± 1,0
• Water soluble chloride content (CI-): ≤ 0,10%.
• Alkali content (Na2O equivalent): max. 2 % by mass
• Main function: Decrease water content. Increase workability.
• Secondary function: To increase initial and final strengths.

Mode of use

Mix 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

Auramix 353G is only compatible with superfluidisers from 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 prior to addition. The resulting properties of concrete containing more than one admixture should be checked by prior testing.

Auramix 353G is suitable for use with all cements complying with RC-08.

Dosing system

The correct amount of Auramix 353G should be measured by means of a suitable dosing system. For best results, the admixture should be added to the concrete in the mixing water or directly into the mixer at the same time as the water.

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

Spills of Auracast 353G should be absorbed with sand or earth and transferred to suitable containers. Product residues should be flushed away with a large amount of water. Disposal of the product and packaging is the responsibility of the end user.

Storage

Auramix 353G has a storage life of 12 months if kept in dry, unopened original 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

Auracast 353G must not be swallowed or come into contact with skin and eyes. Wear protective gloves and goggles. Splashes on the 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 see Material Safety Data Sheet.

Fire

Auracast 353G is not flammable.