Product Data Sheet Show all documents

SikaGrind-769 VN

EFFICIENT GRINDING AID AND PERFORMANCE ENHANCER FOR THE CEMENT

SikaGrind-769 VN is a chloride-free liquid cement grinding aid with performance enhancing properties. SikaGrind-769 VN VN has been specifically designed to increase the output of cement grinding plants and obtain improved strength development for cements with high amount of clinker replacements.

SikaGrind-769 VN is a dispersant with the following characteristics:
  • Neutralisation of electrical charges on the surface of the cement particles
  • Separation of the cement particles
  SikaGrind-769 VN provides the following advantages in the cement production:
  • Enhanced grinding properties of the cement mill due to less accumulation of material on grinding balls and mill-liners.
  • Higher separator efficiency due to improved cement particle dispersion.
  • Reduced relative power consumption per ton of cement due to increased output of the grinding system (tons per hour).
  • Easier achievement of the desired cement fineness (Blaine, particle fraction > 32µm, granulometry) due to reduced re-agglomeration of the sufficiently ground cement particles.
  • Minimized problems with “plugging” due to improved powder flow characteristics.
SikaGrind-769 VN gives the following advantages to the finished cement:
  • Reduced quantity of “over-milled” particles in the cement granulometry
  • Easier discharge of the silos
  • Increased strengths
  • Economic cement design with clinker replacements
  • Improved slump retention of concrete
Product Data Sheet Show all documents

Usage

  • Improve the production rate of the cement grinding system
  • Increase the early strength of the cement.

Advantages

SikaGrind-769 VN is a dispersant with the following characteristics:
  • Neutralisation of electrical charges on the surface of the cement particles
  • Separation of the cement particles
  SikaGrind-769 VN provides the following advantages in the cement production:
  • Enhanced grinding properties of the cement mill due to less accumulation of material on grinding balls and mill-liners.
  • Higher separator efficiency due to improved cement particle dispersion.
  • Reduced relative power consumption per ton of cement due to increased output of the grinding system (tons per hour).
  • Easier achievement of the desired cement fineness (Blaine, particle fraction > 32µm, granulometry) due to reduced re-agglomeration of the sufficiently ground cement particles.
  • Minimized problems with “plugging” due to improved powder flow characteristics.
SikaGrind-769 VN gives the following advantages to the finished cement:
  • Reduced quantity of “over-milled” particles in the cement granulometry
  • Easier discharge of the silos
  • Increased strengths
  • Economic cement design with clinker replacements
  • Improved slump retention of concrete

Packaging

1000 kg IBC

Bulk deliveries

Colour

Brown liquid

Product Details

Product Information

Chemical base

Aqueous polymers solution

Shelf life

12 months if stored properly in original unopened packaging

Storage conditions

Stored in dry conditions, protected from direct sunlight and at temperatures between +5°C and +35°C

Note: When delivered in bulk, the tanks and equipment used must be free from contaminants.

Density

1.075 – 1.115 kg / L (at 20°C)

pH-Value

8.00 – 10.5 (at 25°C)

Application

Application Information

Compatibility

Cements treated with SikaGrind-769 VN are compatible in concretes produced with all commercial admixtures including air entrainers, water reducers, retarders and superplasticizers. The performance of concrete admixtures is not adversely affected by the use of SikaGrind-769 VN.

DISPENSING

SikaGrind-769 VN is added onto the clinker feed shortly before the mill entrance or directly into the grinding mill (first or second  compartment). Suitable dosage pumps with adjustable flow rates shall be used for accurate dosing.
Note: Periodically, the end of the additive tube/hose shall be checked to ensure that it is not blocked.
Consumption

Recommended Dosage

Typical dosage rates of SikaGrind-769 VN are between 0.2 – 0.7 kg per ton of cement (0.02 % – 0.07 % of total weight = cement clinker + additions). The optimum dosage to achieve the desired characteristics shall be determined in Plant trials. Influencing factors are e.g. the properties of clinker source, type of cement and other plant variables.

For consistent results, SikaGrind-769 VN must be accurately dispensed.

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