Expansion of concrete
Expansion of concrete
(OP)
I did not think that concrete would expand so much as to upheaving several inches during a 93 dF ambient temp. in Michigan. I have seen a lot of concrete pavement not upheaving at much higher temperature so is the temperature really to blame as shown in the internet video?





RE: Expansion of concrete
We had 28 blow-ups on the freeways a day or two ago (and about a similar amount the next day) due to the temperature (103F) on the first day.
It is a classic problem of thermal expansion, temperature differential and restraint. the soil is cool and moist, but the surface layer rises in temperature quickly due to the air temperature and the radiant heat. Most of the "blow-ups" were minor and patched until traffic and weather was better.
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.
RE: Expansion of concrete
RE: Expansion of concrete
There is also the curvature from the temperature differential as concretemasonry has mentioned.
RE: Expansion of concrete
RE: Expansion of concrete
RE: Expansion of concrete
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RE: Expansion of concrete
Keep in mind that the temperature differential that must be considered is the temperature at the time of slab set vs. the max. temperature the slab will see. If the concrete was placed in cool weather and then subjected to high ambient temperatures, the effect will be greater than if the initial temperature was, say, 70 degrees F, and the maximum concrete temperature was, say, 95 degrees F.