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.
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.
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.