Question:
In Portland Pozzolana Cement, pozzolanic material reacts with
In Portland Pozzolana Cement, pozzolanic material reacts with
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In PPC, pozzolana reacts with lime \((Ca(OH)_2)\) to form additional cementitious compounds.
Updated On: May 7, 2026
- Water
- Lime
- Gypsum
- Sand
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The Correct Option is B
Solution and Explanation
Concept:
Pozzolanic materials contain reactive silica and alumina. They react with calcium hydroxide produced during cement hydration.
Step 1: During hydration of cement, lime or calcium hydroxide is formed: \[ Ca(OH)_2 \]
Step 2: Pozzolanic material reacts with this lime.
Step 3: The reaction forms additional calcium silicate hydrate gel: \[ \text{Pozzolana}+Ca(OH)_2+H_2O \rightarrow C-S-H \]
Step 4: This improves strength and durability of cement. Therefore, pozzolanic material reacts with: \[ \boxed{\text{Lime}} \]
Step 1: During hydration of cement, lime or calcium hydroxide is formed: \[ Ca(OH)_2 \]
Step 2: Pozzolanic material reacts with this lime.
Step 3: The reaction forms additional calcium silicate hydrate gel: \[ \text{Pozzolana}+Ca(OH)_2+H_2O \rightarrow C-S-H \]
Step 4: This improves strength and durability of cement. Therefore, pozzolanic material reacts with: \[ \boxed{\text{Lime}} \]
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