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What is a pozzolan?

April 26, 2017pozzolan

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What is a pozzolan?

2 Answers

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This is a powdered additive made from burnt clay. It reacts with the lime in a mortar to create harder chemicals and so is very useful for damp or frost-prone environments.

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A. The Pozzolan is an amorphous silicon dioxide capable of reaction with calcium hydroxide generated by the hydration of Portland cement. It could be synthetic such as condensed silica fume, fly ash or slag, or natural, for example volcanic ash.