CHEM RP is a liquid concentrate ready for use. It complies with EN 934-2 Table 8.

USE

CHEM RP is used for setting time prolongation, plasticity improvement and pumping-flow improvement of the concrete. As a plasticizer, it allows the reducing of the necessary water amount. By retarding the concrete setting, it allows vibrating for a long time after its production.

The retarding depends on:

• the CHEM RP quantity per m³ of concrete,
• the concrete and environment temperatures,
• the type (properties) of the cement used.

CHEM RP improves the compressive and flexural strength of concrete (at 3, 7 and 28 days) compared with concrete of the same workability but without CHEM RP. There is a strength increase also when the water amount is kept constant; in this case the plasticity of the concrete is increased as well.

CHEM RP is further used at the following cases:

• on transported concrete for less or no concrete cracking during the setting in summer,
• in order to keep the concrete workable for a long time after its production and until its use,
• in order to avoid joints due to work interruption (the concrete can remain workable until the continuation of works),
• for better concrete workability in case of high ambient temperatures and prolonged waiting times,
• in order to reduce the rate of release of hydration heat,
• in order to reduce the amount of cement for a given strength and workability.

ADVANTAGES

• It does not affect the reinforcement or other building materials.
• Ιt increases the concrete's compressive and flexural strength.
• It does not affect negatively the development of the concrete's strengths (at the recommended dosages).

INSTRUCTIONS

CHEM RP is added together with the mixing water to the concrete.

Dosage: For normal conditions from 2 to 2.5‰ on cement weight that is contained in the concrete. For high temperatures and higher retarding effect the dosage can be increased up to 5‰ on cement weight or more. In the latter case tests are recommended before use.

USEFUL DATA

Packaging: IBCs of 1000 kg, drums of 220 kg, containers of 20 kg.

Shelf life: At least 6 months in the original sealed containers at a cool spot. If frozen, it can be defrosted at low temperature (30°C) under continuous stirring and used without problem.

CHEM RP is compatible with the range of admixtures offered by our company.