Types
The mixing chamber can vary depending upon the application and the mix design of the concrete.
In an auger type mixer, the material and water travels up the Archimedes' screw. Auger lengths can vary from about 5-feet to 15-feet, and vary in diameter and RPM. This type may be portable, but the length of the auger is a limiting factor.
A paddle mixer blends the concrete mix using a rotational motion and is used to blend finer gravels and sand, as in mortar. The majority of drum mixers are mounted on trailers and are pulled to a jobsite using a pick-up truck. These drums usually have a mixing capacity of between 1-yard and 1.75 yards (0.76 and 1.34m3) per batch.
A Paddle mixer tumbles the mixture in a folding motion using curved fins and paddles. This is the most common type of volumetric mixing. Paddle mixers usually mix in smaller batches directly on the jobsite.
Read more about this topic: Volumetric Concrete Mixer
Famous quotes containing the word types:
“He’s one of those know-it-all types that, if you flatter the wig off him, he chatter like a goony bird at mating time.”
—Michael Blankfort. Lewis Milestone. Johnson (Reginald Gardner)
“The rank and file have let their servants become their masters and dictators.... Provision should be made in all union constitutions for the recall of leaders. Big salaries should not be paid. Career hunters should be driven out, as well as leaders who use labor for political ends. These types are menaces to the advancement of labor.”
—Mother Jones (1830–1930)
“Our children evaluate themselves based on the opinions we have of them. When we use harsh words, biting comments, and a sarcastic tone of voice, we plant the seeds of self-doubt in their developing minds.... Children who receive a steady diet of these types of messages end up feeling powerless, inadequate, and unimportant. They start to believe that they are bad, and that they can never do enough.”
—Stephanie Martson (20th century)