The decision this case can inform
Use this record when testing whether clinker chemistry can be relaxed without sacrificing finished-cement strength or compliance.
GCP supplier case based on laboratory and plant trials. Strength and LSF results are reported, but net energy, CO₂, durability, and cost outcomes are not quantified.
What the public record actually establishes
- F1
The reported raw mix was approximately 75% cement rock and 25% high-grade limestone, with a silica ratio near 4:1.
- F2
The program used laboratory screening followed by plant trials of a cement quality improver.
- F3
Supplier-reported mortar strength increased from 58 to 65 MPa and reference concrete from 28–30 to 32–34 MPa.
- F4
Clinker LSF was reduced from 98 to 95 while the plant reportedly maintained cement strength.
Facts and reported results are kept separate from the lesson a plant may choose to test.
Operating context
High LSF and a high-silica raw mix supported strength but increased fuel demand.
Intervention or finding
Laboratory and plant trials evaluated a cement quality improver at lower clinker LSF.
Documented result
Supplier reports mortar strength 58 to 65 MPa, reference concrete 28-30 to 32-34 MPa, and clinker LSF reduced from 98 to 95 while maintaining cement strength.
Plant interpretation
Optimize clinker chemistry and finished-cement performance together using controlled trials, standards, durability review, and surveillance.
Transfer boundary
Supplier-reported; energy, CO2, and cost reductions are not quantified.
Questions to verify at your plant
These are decision checks, not operating instructions. Resolve them through local risk assessment, technical review, and authorization.
- 01
Are trials designed around local raw materials, cement standards, sulfate balance, fineness, additives, and customer applications?
- 02
Do strength results extend across ages, production variability, and durability requirements rather than one endpoint?
- 03
Are kiln stability, free lime, refractory conditions, cement performance, and additive dose tracked together?
- 04
Will verified fuel, power, clinker factor, CO₂, and total cost determine whether the change creates net value?