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Table 6 Thermal crack criteria.

From: Thermal and Mechanical Behaviors of Concrete with Incorporation of Strontium-Based Phase Change Material (PCM)

Criteria

Thermal crack index (Icr)

To prevent cracks

Icr ≥ 1.5

To limit cracks

1.2 ≤ Icr < 1.5

To limit harmful cracks

0.7 ≤ Icr < 1.2