Discussion
Intergrinding a supplementary material with clinker differs from blending it afterwards in that intergrinding
Answer: C
Correct answer: produces different finenesses for each constituent
In a mill both materials are subject to the same grinding, but the softer one breaks down faster and ends up finer. Since clinker and slag differ in hardness, intergrinding gives each an unintended fineness, and the harder one may be left too coarse - which is why separate grinding is sometimes preferred.
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