Polydos SR 770

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 retarder / high-range water reducer / superplasticizer concrete admixture

Description
Polydos® SR 770 is a new-generation, polycarboxylate-based superplasticizer admixture used in high-performance concrete production. It provides excellent flowability and passing ability, allowing the concrete to easily fill densely reinforced, narrow, and deep sections. It can self-compact without the need for internal or external vibration, while maintaining cohesion and preventing segregation and bleeding.

Areas of Use

• In ready-mixed concrete production that needs to be transported over longer distances in hot climates
• In concretes requiring high water reduction and extended workability
• In reinforced concrete structures with dense and narrow reinforcements where placement is challenging
• In the production of higher-quality and higher-strength concretes
• In concretes requiring dense and smooth surfaces
• In foundations, slabs, beams, columns, and wall concretes
• In bridge, viaduct, tunnel, airport, and dam concretes
• In concretes where impermeability is required
• To compensate for loss of workability caused by hot, windy, and humid weather conditions
• In the production of self-compacting concrete (SCC)

Features / Advantages

• Provides long-lasting slump retention
• Significantly improves early high strength development
• Substantially reduces the water content in the concrete mix
• Grants self-compacting properties to concrete
• Allows for high unit weight and strength
• Produces low-void, aesthetically pleasing, and less permeable concrete
• Controls and extends setting times
• Enables long-distance pumping of concrete
• Provides void-free and smooth surfaces
• Eliminates the need for vibration, reducing noise pollution
• Reduces carbonation rate and improves mechanical properties such as shrinkage and creep
• Improves impermeability through a low water/cement ratio
• Maintains workability in summer without the need for re-tempering

Dosage

• For flowable and self-compacting concretes, it is recommended to use between 0.5 – 2.0 kg per 100 kg of binder (cement – microsilica – fly ash).
• The dosage may vary depending on the properties of aggregates, concrete grade, water/cement ratio, water quality, and ambient temperature. Therefore, it is recommended to determine the appropriate dosage through preliminary laboratory trials.
• During consistency adjustment, the high water-reducing capability of the admixture should be considered, and the addition of excess water should be avoided.

Technical Specifications