What causes crack in roads or pavements?
Answer:
concrete roads or pavements should have expansion and contraction joints at intervals and temperature bars to minimize cracking due to temperature change.
expansion and contraction
Frost heaves from winters past or earth settling.
Uneven heating and cooling both in Summer and in winter, If there is a small crack in the road and it gets filled with water and then freezes then it will crack bug time!
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The cracks get filled with water and then when its gets cold its freezes then it crack.
Expansion during the summer and contraction during the winter
changes in temperature, heavy rain, traffic.
It can be caused by many of things like viberations coming from the ground, it could be a very loud crack ok thunder, or it could just be the ground setteling in.
Well... things expand when it is hot and contract when it is cold... so, maybe the road contracts after the rain where the weather is cold causing there to be a crack in the road... but after that, it usually retains it usual-self doesn't it??
Frost can cause the earth beneath to shift and the road to buckle (frost heaves). Roads are not meant to last forever. Rain can wash away the soil around and under the roadway.
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