Use of Secondary Crystallization and Fly Ash in Waterproofing Materials to Increase Concrete Resistance to Aggressive Gases and Liquids

<div>(a) The SEM shot of the concrete treated with coat after 18 months in liquid Na<sub>2</sub>SO<sub>4</sub>; (b) a detail of the formed ettringite crystals.</div>

Advances in Civil Engineering

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Figure 11

Figure 11: Use of Secondary Crystallization and Fly Ash in Waterproofing Materials to Increase Concrete Resistance to Aggressive Gases and Liquids 