7/21/2019 Sulfate Attack CHEMICAL Reactions

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Sulfate Attack

Formation of Gypsum

Formation of Ettringite

Monosulfate Gypsum Water Ettringite

[4 ] ∗ 3 2 4 ∗ 16 → [ ∗12] ∗ 43 ∗ 2

Calc. Aluminate

Monosulfate Water Anion Cation Ettringite

[4 ] ∗ 4 ∗ 6 2 (4−) 2 +  

→  43 ∗ 26