Discussion
Assertion (A): Belite-rich cement has not displaced ordinary Portland cement despite its lower emissions.
Reason (R): Belite hydrates slowly, so early strength is much lower than the construction industry expects.
Answer: A
Both are true and the reason gives the obstacle: construction schedules are built around early strength, and a binder that takes months to reach a usable figure changes the economics of a project far more than the cement price does.
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