Discussion
Consider the following statements about alkali-activated binders.
1. They can be made from fly ash or ground slag.
2. The activator is typically a strong alkaline solution.
3. They require the same kiln and clinker as Portland cement.
Answer: B
The first two are correct. The third is precisely what they avoid, since dispensing with clinker altogether is the whole basis of their claimed environmental advantage. The saving comes from not calcining limestone at all.
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