Because they need it.
Tennessee Concrete Association was created in 1986.
tennessee
how much do concrete layers make an hour
To make moldable concrete, mix concrete with a polymer additive that increases its flexibility and workability. This allows the concrete to be shaped and molded into various forms before it hardens.
To make concrete smooth, you can use a concrete float or trowel to level the surface while it is still wet. You can also use a concrete grinder or polisher to smooth out any rough spots after the concrete has dried.
Reinforced concrete is just normal concrete with steel reinforement placed inside.
If the correct concrete mix is used and laid properly, hot weather should not make concrete crack. Instead, it is the freeze-thaw cycle that makes concrete crack.
Commercial concrete companies make many millions/year.
Most bags will make a 1/3 of a cubic foot of concrete.
A concrete mixture of sand, cement, and small gravel is used to make the concrete from which the tubular concrete pipe is made. The pipe is made of concrete.
It is synthetic, but what we use to make concrete is natural AND synthetic.
about 60 60lb bags