Why Does Concrete Crack?

Like all other materials, concrete will slightly change in volume when it dries out.

This change in volume brings about stresses within the concrete which causes it to crack. This is the reason why we put joints in concrete pavements and slabs to allow the concrete to crack in a neat, straight line at the joint, allowing it to move when the volume of the concrete change due to shrinkage.

The prevailing weather conditions may also contribute to cracking with the risk most likely on warm days, dry days with low humidity and/or windy days.

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