Why is My Fiberglass Bathtub Cracking? You need to understand why fiberglass bathtubs crack to ensure that this does not. Why is my bathtub shower diverter.

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Concrete is strong when compressed but relatively weak  and brittle when stretched.    If the soil under the pavement is eroded, or expands during  freezing, or is li fted enough by tree roots, the pavement will bend  and crack on the convex side.    When concrete is poured, it warms as it hardens and then contracts  slightly as it cools back down. If the poured block is long enough,  then it will have enough contact with the Earth so the ends resist  such movement, and the block will pull itself apart.    Highway pavement has steel mesh or even rebar (reinforcement bars)  to resist the tensile (stretching) forces. It can only help to a  certain extent. If such a pavement block is long enough, then  normal environmental forces will exceed the reinforcement; heating  and cooling the pavement, for example. Bijoy Bangla Windows 7 Software here.

   In addition, highway pavement is subject to high pressure from  freight trucks and shock waves from high speed traffic. It is also  poured in very long continuous sections.

If there are not enough  (closely spaced) contraction joints to attract inevitable cracking,  then they will occur between contraction joints at  random.   Answer:   Due to temperature stresses during hydration process, longitudinal  and transverse cracks develop on concrete pavements.  civil engineering - GITAM  UNIVERSITY .