Question:
Which of the following equations is correct for the Pozzolanic reaction?
Which of the following equations is correct for the Pozzolanic reaction?
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In Pozzolanic reactions, silica reacts with calcium hydroxide to form calcium silicate hydrate (C-S-H), which is essential for the hardening of concrete and cement-based materials.
Updated On: Jan 11, 2026
- Ca(OH)\(_2\) + Reactive Superplasticiser + H\(_2\)O \(\rightarrow\) C-S-H
- Ca(OH)\(_2\) + Reactive Silicon dioxide + H\(_2\)O \(\rightarrow\) C-S-H
- Ca(OH)\(_2\) + Reactive Sulphates + H\(_2\)O \(\rightarrow\) C-S-H
- Ca(OH)\(_2\) + Reactive Sulphur + H\(_2\)O \(\rightarrow\) C-S-H
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Pozzolanic reactions involve the combination of calcium hydroxide (Ca(OH)\(_2\)) with silica (SiO\(_2\)) and water (H\(_2\)O) to form calcium silicate hydrate (C-S-H), which is the primary binder in cementitious reactions. The correct reaction is:
\[
\text{Ca(OH)}_2 + \text{SiO}_2 + \text{H}_2\text{O} \rightarrow \text{C-S-H}.
\]
Therefore, the correct equation is option (B), where reactive silicon dioxide reacts with calcium hydroxide to form C-S-H, contributing to the strength of the cement.
Final Answer:
(B) Ca(OH)\(_2\) + Reactive Silicon dioxide + H\(_2\)O \(\rightarrow\) C-S-H.
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