Which risk increases in prestressed concrete beams without sufficient grouting of tendon ducts?

💡 Explanation

Without proper grouting, moisture and chlorides ingress promotes galvanic corrosion because the steel tendons become vulnerable causing localized pitting and eventual rupture under load and subsequently propagating along the ungrouted tendon. Therefore tendon rupture propagation grows, rather than shear failure, buckling or spalling that involve different mechanisms or require different conditions.

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