What is C4AF?

The calcium aluminoferrite (C4AF) forms a continuous phase around the other mineral crystallites, as the iron containing species act as a fluxing agent in the rotary kiln during cement production and are the last to solidify around the others.

What does C3S indicate in setting of cement?

Strength properties are known to much depend on the tricalcium silicate (C3S) content. In general terms this means that the higher the CaO content in the clinker, the better the hardening conditions.

What is the chemical formula for cement?

Chemical Formulas of Cement Materials

How are the C3S, C3a and C4AF related?

While C3A accelerates cement hydration, C4AF is more a consequence of clinker pyroprocessing than a necessary component. The C4AF acts as a powerful flux in the rotary kiln. Together with the C3A it forms a liquid phase at 1338C, necessary to the formation of C3S from C2S and free CaO.

What’s the difference between C3a and C4AF in Portland cement?

In Type I Ordinary Portland Cement clinker the amount of C3A+C4AF rarely exceeds 18%. While C3A accelerates cement hydration, C4AF is more a consequence of clinker pyroprocessing than a necessary component. The C4AF acts as a powerful flux in the rotary kiln.

How does calcium aluminoferrite ( C4AF ) form a continuous phase?

The calcium aluminoferrite (C4AF) forms a continuous phase around the other mineral crystallites, as the iron containing species act as a fluxing agent in the rotary kiln during cement production and are the last to solidify around the others. Figure shows a typical cement grain. A pictorial representation of a cross-section of a cement grain.

When to use LSF and C3S in cement?

This means that, the only case where the LSF of the raw meal directly correlates with the C3S content of the clinker is when you use natural gas (or oil) as the only fuel, and your raw meal is the only other input to the kiln and clinker is the only output. These days very few cement plants are this simple.