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.

cracked concete

Cracked concete

concretewithjoints

Joints allow for expansion

About John Nisa

I’m a bit more than a concretor, I have more than 13 years’ experience in the construction industry and been on both sides of the fence - designing and constructing. I understand what is needed to pass council regulations and inspections. I’m not interested in doing fast rough jobs. I pride myself in delivering a fantastic job. I want to be proud to put my name on every job.

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