pavement is basically a mixture of rock and sand held together by
Portland cement. When water is added a chemical reaction takes place.
The mud must be placed and finished before the reaction is too far
along or it will lose its strength. In the chemical reaction heat
is produced, the water evaporates, and a rigid (rock-like) pavement
results. For some applications wire mesh, rebar or fiber mesh are
included in the pavement for additional strength. Concrete does
not bend. It is strong but brittle. It is especially useful for
water courses (drain pans, curb and gutter) and high weight loading
areas (dumpster pads). It is more expensive to install than asphalt
but is a wise investment for certain locations.