Discussion
Finer grinding of cement increases its
Answer: A
Correct answer: rate of hydration and early strength
Hydration proceeds from the surface of each grain inward, so finer grinding exposes more surface and the reaction goes faster. Early strength therefore rises with fineness, as does the rate of heat release. The ultimate strength changes little, since given time even coarse grains hydrate, and finer grinding costs more energy and makes the cement more prone to deterioration in store.
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