Thursday, July 10, 2014

Where the Sidewalk Cracks

Well, technically a driveway.

But why does concrete crack?
Concrete responds to changes in the environment. It's a material that expands when heated and contracts when cooled. The underlying soil responds to temperature shifts and erosion. Force from heavy traffic can also contribute.

Subdividing the concrete into sections help relieve the tension. Note the strong line at the bottom.
(Thought the 90 degree intersection on this driveway was interesting.)



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