Polydos SR 820

High-Performance Superplasticizer Concrete Admixture

Standard
Ministry of Public Works Specification No: 04.613/1-A3
TS EN 934-2 Tables 11.1 and 11.2: Set retarding / high-range water-reducing / superplasticizer concrete admixture

Description
Polydos® SR 820 is a new-generation, polycarboxylate-based superplasticizer admixture designed for high-performance concrete production. It is especially suitable for concrete mixes requiring very high early strength development, high water reduction, and excellent flowability.

Fields of Application

• Ready-mixed concrete production requiring long-distance transportation in hot climates

• To counteract consistency loss in hot, windy, and humid weather conditions

• Concretes requiring excellent flow and long-term workability retention

• Higher quality and high-strength concretes

• Densely reinforced structural elements that are difficult to place

• Concretes demanding dense and smooth surface finishes

• Concrete mixes requiring high impermeability

• Architectural, engineering, and decorative concrete applications

• Structural elements with complex and detailed formwork

• Self-compacting concrete (SCC) production

• Use in ready-mix concrete production

Features / Advantages

• Maintains slump consistency for a long time in hot weather without the need for re-tempering

• Prevents rapid slump loss and provides long-term workability depending on cement type

• Enables high unit weight and strength

• Produces low-void, visually smooth, and less permeable concrete

• Facilitates easier placement and faster strength gain, saving labor and allowing earlier formwork removal or cycling

• Reduces carbonation rate and improves mechanical properties such as shrinkage and creep

• Ensures pumpability over long distances

• Provides significantly higher early strength development

• Greatly reduces mixing water content

• Grants the concrete excellent self-compacting capability

Dosage
For fluid and self-compacting concretes, it is recommended to use 0.4 – 2.0 kg per 100 kg of binder (cement – microsilica – fly ash).
The admixture dosage may vary depending on aggregate properties, concrete grade, water/cement ratio, water quality, and ambient temperature. Therefore, it is recommended to determine the exact dosage by conducting preliminary trial mixes in a laboratory setting.
During consistency adjustments, the high water-reducing effect of the admixture should be considered and the addition of excess water should be avoided.

Technical Specifications