CASTAIDSLAG 905
Grinding Aid for Granulated Blast-Furnace Slag and Slag-Blended Cements
CASTAID SLAG 905 is a high-performance additive specially designed to improve slag grinding and blended cement production, for GGBFS and other slag-blended cements.

Overview
About
CASTAID SLAG 905 is a high-performance additive specially designed to improve slag grinding and blended cement production, for GGBFS and other slag-blended cements. It is formulated to enhance productivity, compressive strength and overall quality, and is suitable for use in ball mills and vertical mills.
Typical uses
CASTAID SLAG 905 is recommended for slag grinding and the production of other hydraulic cementing materials.
Standards
CASTAID SLAG 905 meets the requirements of ASTM C465- 85.
Compatibility
CASTAID SLAG 905 is compatible with all types of Portland cement and blended cement replacement materials such as GGBS, PFA and limestone, and with all CASTECH range concrete admixtures.
Benefits
Advantages
Key advantages
- Increased | productivity | – | boosts | mill productivity, reducing cement grinding costs and specific energy consumption
- Agglomeration | reduction | – | minimizes agglomeration during grinding and the pack-set index (PSI) in silos, reducing blockages and cake formation
- Enhanced efficiency – optimizes separator and classifier efficiency for a more streamlined production process
- Flowability optimization – improves flowability of the cement transportation system for seamless handling
- Powder flowability – improves powder flowability in storage silos, optimizing bulk dispatch and handling
- PSD enhancement – refines particle size distribution, improving workability and compressive strength
Technical data
| Component | Single |
|---|---|
| Form | Liquid |
| Colour | Brownish |
| Specific Gravity (ASTM D1475) | 1.02 – 1.06 |
| Chloride Content (EN 480-10) | < 0.10% |
Typical values. Refer to the TDS for full details and test conditions.
Application
Dosage
Typical dosage rates of CASTAID SLAG 905 are between 0.02 – 0.8 kg per tonne of slag (0.02 – 0.08% of slag). The optimum dosage to achieve the desired characteristics shall be determined in plant trials. Influencing factors include the properties of the slag source, type of slag and other plant variables.
Application
CASTAID SLAG 905 is a ready-to-use liquid additive. Industrial trials are recommended to determine the ideal dosage for specific requirements. It can be introduced directly into the mill or onto the feed Slag and Slag-Blended Cements conveyor belt. For continuous processes, dose with a volumetric dosing pump to ensure a consistent output and precise
Packaging & storage
Packaging
CASTAID SLAG 905 is available in IBC, 200 kg drums and bulk tanks upon request.
Storage & shelf life
12 months from date of manufacture when stored under warehouse conditions in original unopened packing. Extreme temperature/humidity may reduce shelf life.
Health & safety
Do not mix with other products without advice from the manufacturer. Should the product freeze, some crystals may appear, which will disappear on agitation or when the temperature rises above freezing. PPE: Suitable protective goggles, gloves and mask must be worn. Precautions: In case of contact with eyes, rinse immediately with plenty of water; in case of contact with skin, wash off immediately with soap and water. If swallowed, seek medical attention immediately. Hazard: Regarded as non-hazardous for transportation. Disposal: Do not reuse containers. Dispose of as per local rules and regulations. Additional information: Refer to MSDS (available on request).