Uses

• For the manufacture of concrete of different consistencies, without changes in the dosage of aggregates or cement, modifying only the additive dosage in the ready-mixed concrete plant.
• At low doses it behaves as a plasticising admixture.
• By varying the dosage, it can also be used as a superplasticiser or as a high-range water reducer.

Advantages

• At high dosages, it does not produce considerable variations in setting time.
• Reduced viscosity.
• Control of air entrapment.
• Can be used in reinforced, prestressed or mass concrete, as it is chloride-free.
• Facilitates concrete placement in a simpler and faster way.
• It increases mechanical resistance considerably.
• It increases workability without adding extra water and therefore maintaining resistance levels.
• Reduces permeability in concrete.

Standards

Conplast MR276 complies with UNE-EN 934-2:2010 Table 2 as a water reducer/plasticiser.

Description

Conplast MR276 is a multifunctional plasticiser formulated from a blend of synthetic and natural polymers.

Optimum dosage

The optimum dosage of Conplast MR276 to achieve specific requirements should be determined by trials using the materials and conditions that will be used in practice.

A starting point for such tests is to use a dosage between 0.3 and 1 litre of Conplast MR276 per 100 kg of cementitious material, including ash, slag and microsilica.

Properties

The following results were obtained at a temperature of 20°C:

• Appearance: Dark brown liquid
• Density: 1,185 ± 0,01 kg/l
• pH: 3,5 ± 1,0
• Water soluble chloride content (CI-): ≤ 0,10%.
• Alkali content (Na2O equivalent): max. 5 % by mass
• Primary function: To increase workability
• Secondary function: Increase mechanical strength

Mode of application: Compatibility

Compatibility

Conplast MR276 is compatible with other Fosroc Euco admixtures in the same concrete mix. 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 must be checked by prior testing.

Conplast MR276 is suitable for use with all cements complying with RC-08.

Dosing system

The ideal quantity of Conplast MR276 should be measured by means of a suitable dosing system. The admixture should be added to the concrete with the mixing water for best results. Contact Fosroc Euco's Technical Department for advice on suitable equipment and 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

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 Conplast MR276 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

Conplast MR276 has a storage period of 12 months if kept in a dry place and in its original, closed containers at a temperature between 2ºC and 40ºC.

Freezing point: -3 ºC approx.

Precautions

Safety and Hygiene

Conplast MR276 should not be ingested or put in 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, please refer to the Material Safety Data Sheet.

Fire

Conplast MR276 is water based and non-flammable.