Why is the setting and hardening of lime mortar a slow process?
What will be an ideal response?
The setting and hardening of lime mortar is due to the reaction of lime (in lime mortar) with atmospheric carbon dioxide. As the outer layer of mortar hardens, it decreases the penetration of carbon dioxide into the interior layers of mortar, slowing the setting process. Additionally, the amount of carbon dioxide in atmosphere is extremely
small.
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