Specific surface area of cement

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The surface area of the cement particles of unit mass is called the specific surface area of the cement.

It is represented by square centimeters per gram (cm2/g) or square meter per kilogram (m2/kg).

The specific surface area of the cement is related to the fineness of the cement. The thinner the cement grind, the larger the specific surface area, and vice versa. The specific surface area of cement is generally around 350. If it is too thin, early hydration will be more sufficient, early strength will be high, water demand will be large, and the probability of concrete cracking will be large. Conversely, the early strength will be low and the water demand is small.

  1. The specific gravity of cement is 3.15