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 Why are there lines in the sidewalk?

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Ilaw ng Konek
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PostSubject: Why are there lines in the sidewalk?   Thu Feb 26 2009, 12:08

Why are there lines in the sidewalk?

When concrete dries, it shrinks and when it shrinks, it cracks. If the concrete didn't have lines in it, the cracks would form randomly and the concrete would break apart.

This way, the cracks follow the lines, because that's where the slab is the thinnest.

In other words, it's the best way to make do with a bad situation.

Source: coolquiz.com
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