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BUILDING BLOCK OF HUMANITY
Concrete is the second-most consumed material on
Earth, aer water. According to concrete know-it-
alls Cement Trust:
“There are nearly three tons of concrete produced
each year for every human on the planet, making
it the most used man-made product in the world.
Concrete producon and concrete construcon
have an impact on almost every facet of human
existence.”
WHAT IS CONCRETE?
Concrete is a mixture of aggregate materials with
uid cement paste. The American Concrete Ins-
tute denes aggregate as “granular material, such
as sand, gravel, crushed stone, crushed hydraulic
cement concrete, or air-cooled iron blast-furnace
slag, used with hydraulic cement to produce either
concrete or mortar.”
CONCRETE CONSTRUCTION STEPS
Following these steps (courtesy of The Constructor)
allows concrete to reach its maximum strength, en-
abling it to hold up dams, steady bridges and help
buildings stay standing.
ALL ABOUT THE AGGREGATES
The Portland Cement Associaon, one of the most
authoritave sources on concrete informaon, says
the process of obtaining aggregate for cement is
more complex than most people are aware of.
“For a good concrete mix, aggregates need to
be clean, hard, strong parcles free of absorbed
chemicals or coangs of clay and other ne materi-
als that could cause the deterioraon of concrete.
Aggregates, which account for 60 to 75 percent of
the total volume of concrete, are divided into two
disnct categories--ne and coarse.
Fine Aggregates
Fine aggregates generally consist of natural sand or
crushed stone with most parcles passing through a
3/8-inch sieve.
3
2 X MORE
THAN WOOD, STEEL, PLASTIC,
AND ALUMINUM COMBINED