Product Data Sheet Show all documents

SikaGrind®-421 Optimizer PK

Grinding aid and quality improver for the production of cement

SikaGrind®-421 Optimizer PK is a chloride free liquid additive to allow easier grinding of cement and enhance the quality of all types of cement. SikaGrind®-421 Optimizer PK has been specifically developed to obtain cements with increased early and final strengths.

SikaGrind®-421 Optimizer PK is a very effective dispersant with the following characteristics:
  • Neutralisation of electrical charges on the surface of the cement particles
  • Separation of the cement particles
SikaGrind®-421 Optimizer PK provides the following advantages in the cement production:
  • Higher efficiency of the plants (tons per hour) due to reduced grinding time per ton.
  • Higher separator efficiency due to improved dispersion
  • Faster achievement of the desired cement fineness
  • Reduced particle fraction > 32ì of the ground cement
  • Reduced re-agglomeration of the cement particles
  • Less accumulation of material on grinding equipment (grinding balls and mill)
  • Cost savings due to a lower power consumption per ton
  • Easier handling and minimized problems with “plugging” due to improved flow characteristics
SikaGrind®-421 Optimizer PK gives the following advantages to the finished cement :
  • Reduced handling costs especially on pneumatic conveying systems
  • Reduced risk of hydration in the silo
  • Easier discharge of the silos
  • Optimum cement granulometry (reduced quantity of “over-milled” particles)
  • Increased early and final strengths
  • Improved final strengths
  • Allows economic cement design with clinker replacements
  • Reduced water demand
  • Uniform air entrainment in the stated dosage range
  • Consistent setting times
  • Reduced brown or yellow discolorations
 
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Product Data Sheet Show all documents

Usage

SikaGrind®-421 Optimizer PK is used in the grinding of cement to:
  • Increase the production rate
  • Improve the efficiency of the mill and separator
  • Enhance the quality of the cement
 

Advantages

SikaGrind®-421 Optimizer PK is a very effective dispersant with the following characteristics:
  • Neutralisation of electrical charges on the surface of the cement particles
  • Separation of the cement particles
SikaGrind®-421 Optimizer PK provides the following advantages in the cement production:
  • Higher efficiency of the plants (tons per hour) due to reduced grinding time per ton.
  • Higher separator efficiency due to improved dispersion
  • Faster achievement of the desired cement fineness
  • Reduced particle fraction > 32ì of the ground cement
  • Reduced re-agglomeration of the cement particles
  • Less accumulation of material on grinding equipment (grinding balls and mill)
  • Cost savings due to a lower power consumption per ton
  • Easier handling and minimized problems with “plugging” due to improved flow characteristics
SikaGrind®-421 Optimizer PK gives the following advantages to the finished cement :
  • Reduced handling costs especially on pneumatic conveying systems
  • Reduced risk of hydration in the silo
  • Easier discharge of the silos
  • Optimum cement granulometry (reduced quantity of “over-milled” particles)
  • Increased early and final strengths
  • Improved final strengths
  • Allows economic cement design with clinker replacements
  • Reduced water demand
  • Uniform air entrainment in the stated dosage range
  • Consistent setting times
  • Reduced brown or yellow discolorations
 

Packaging

05 ltr jerry can
20 ltr plastic can
200 ltr drum
1000 ltr IBC
Bulk supply in tanker is possible on demand

Colour

Clear brown liquid

Product Details

Product Information

Chemical Base

Blend of amines and glycol

Shelf Life

12 months shelf life from date of production if stored properly in undamaged, unopened, original sealed packaging.

Storage Conditions

Store in undamaged, unopened, original sealed packaging in dry conditions at temperatures between +5 °C and +35 °C. Protect from direct sunlight and frost.

pH-Value

≥ 8

Specific gravity

1.075 ± 0.02

Application

Application Information

Compatibility

Cements treated with SikaGrind®-421 Optimizer PK are compatible in concretes produced with all commercial admixtures including air entrainers, water reducers, retarders and super plasticizers. The performance of concrete admixtures is not adversely affected by the use of SikaGrind®-421 Optimizer PK
Please consult our Technical Services Department.

Dispensing

SikaGrind®-421 Optimizer PK is added into the grinding mill (first or second compartment), onto the clinker feeding channel or sprinkled / dropped onto the clinker (raw material) on the conveyor belt. Suitable dosage pumps with adjustable flow rates should be used for accurate dosing.
Note: Periodically, the end of the additive tube should be checked to ensure, that it is not blocked with cement clinker/dust.
Consumption

Recommended Dosage

Typical dosage rates of SikaGrind®-421 Optimizer PK are between 0.2 - 0.8 kg per ton of cement (0.02% -0.08% of total weight = cement clinker + additions). The optimum dosage, which changes according to the properties of each clinker source, type of cement and other plant variables, should be determined in Plant trials according to the desired properties of the cement. For consistent results, SikaGrind®-421 Optimizer PK must be accurately dispensed.

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