Cracking attributed to externally applied loads

This type of cracking is caused by load-induced tensile stresses and is not a common phenomenon in concrete pavement slabs. However, an early use of the pavement slab without the concrete having achieved its required strength may cause cracking, primarily, near the edges of the joints. 

This type of cracking requires the existence of freezing and thawing periods over a certain period. It is exclusively caused by the use of frost-damaged aggregates. 

Typical time of appearance of defrost cracking is more than 10 years. To avoid defrost 

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