Sulphate Attack on Concrete

Dr. Safeer Abbas Assistant Professor

Civil Engineering Department

UET Lahore, Pakistan

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Sulphate Attack

Sulphate Attack

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Sulphate Attack

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Sulphate Attack

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Early Research on Sulphate Attack

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Sulphate Attack: Process I:

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Expansion Cracking Mechanism:

Normal Mechanism of Sulphate Attack

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Normal Mechanism of Sulphate Attack

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Sulphate Attack: Process II

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Strength Reduction Mechanism

Sulphate Attack: Process II

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Sulphate Attack: Process II

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Surface Softening (Magnesium Sulphate only)

Damage due to Salt Crystallization

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Damage due to Salt Crystallization

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Factors Influencing the Extent of Attack

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Factors Influencing the Extent of Attack

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Consequences of Attack

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Preventing Sulphate Attack

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Concrete Exposed to Sodium Sulphate

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Test Methods

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Sulphate Attack

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Thaumasite Form of Sulphate Attack

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What happens when Thaumasite Form

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Case Studies: UK Bridges

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