CHEM RP

Concrete Admixture – Retarder, plasticizer and pumping-flow improvement agent. CHEM RP is a liquid concentrate ready for use.

It complies with EN 934-2 Table 8.

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Use

Advantages

Instructions

Useful Data

Retarders

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.
  • 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)
  • It has a chloride content below 0.1%

CHEM RP is added together with the mixing water to the concrete, or directly into the truck at the jobsite.

Dosage

For normal conditions from 0.2 to 0.3% on cement weight that is contained in the concrete. Dosage tests are recommended before use.

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

General

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.