Is it true that the world is running out of sand to produce concrete, and if so, why is that?
In: 92
The producers are running out of “cheap” sand for their customers. Here in middle Tennessee our river sand is dredged form the Ohio river near Paducah, KY and barged down the local rivers to us for use. With the rising costs of labor, barges and tugboats to move the barges the cost of river sand is rising. We have some companies in Monteagle and Jackson, TN who crush sand from local deposits. The problem with man-made sand is that there are more fine particles in it than naturally occurring river sand. Local concrete producers prefer river sand as it has less fines and uses less water to produce a higher strength concrete. Man-made sand takes more water and more cement to produce the same strengths, it also has some negative qualities on finishing the concrete placement contractors complain about.
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