Struset RST

Set-Retarding and Slump Retaining Admixtures

Struset RST is a water solution of active polymers that retard cement hydration and limit slump loss in concrete and cementitious materials during hot weather and when transporting over long distances.

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Uses

Provides retardation in initial and final setting time in all cementitious materials.

Advantages

Set retardation allows extra placing time for larger pours.
Set retardation controls stiffening time of concrete and cementitious materials in hot weather.
Long distance transportation of concrete

Standards compliance

Struset RST conforms with ASTM C494 as Type B.

Properties

Appearance

Light green liquid

Specific gravity

1.10 ± 0.03 gr/cm3 at 20°C

Chloride

Nil to BS5075

Air entrainment

Typically less than 2% additional air is entrained at normal dosages.

Alkali content

Typically, less than 15.0 g. Na2o equivalent/litre of admixture. A fact sheet on this subject is available.

Instructions for use

Compatibility: Struset RST is compatible with other STRUMIX admixtures in the same concrete mix. All admixtures should be added to the concrete separately and must not be premixed together prior to addition. The performance of concrete containing more than one admixture should be assessed by trial mixes.
Struset RST is suitable for use with all types of Portland cements, SRC cements and cement replacement materials such as PFA, GGBFS and microsilica.
The use of a combination of admixtures in the same concrete mix and or cement replacements may alter the setting time. Trials should always be conducted to determine such setting times.
Dispensing: The correct quantity of Struset RST should be measured by means of a recommended dispenser. The admixture should then be added to the concrete with the mixing water to obtain the best results.

Packaging & Storage

Struset RST is available in 20 kg containers, 200 kg drums and 1100 kg IBC tank.
Struset RST has a minimum shelf life of 12 months provided the temperature is kept within the range of 5°C to 35°C. Should the temperature of the product fall outside this range then contact STRUMIX for advice.
Freezing point: Approximately -5°C

Health and safety

Struset RST does not fall into the hazard classifications of current regulations. However, it should not be swallowed or allowed to come into contact with skin and eyes. Suitable protective gloves and goggles should be worn. Splashes on the skin should be removed with water. In case of contact with eyes rinse immediately with plenty of water and seek medical advice. If swallowed seek medical attention immediately - do not induce vomiting.

Fire

Struset RST is non-flammable.