Which risk increases significantly on a pre-stressed concrete beam immediately after tendon de-tensioning before grout application?

💡 Explanation

When tendons are de-tensioned before grout application, a localized stress gradient results because the compressive force is transferred to a small section of the beam, creating shear crack propagation as it equilibrates. Therefore, shear crack propagation occurs, rather than corrosion, instability or freeze-thaw damage which involve substantially different mechanisms and timings.

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