Because they need it.
Tennessee Concrete Association was created in 1986.
tennessee
how much do concrete layers make an hour
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.
about 60 60lb bags
It is synthetic, but what we use to make concrete is natural AND synthetic.
Both glass and concrete contain sand. Sand is melted to make glass. It is mixed with aggregate (gravel) portland cement and water to make concrete.
you need to have a ''keyway''---that is a groove in the base concrete,can be cut in if concrete has set,if not set,oil a 2x4lightly(lightly) & imbed it into the base concrete flush.