History
The history of volumetric mixing comes from several directions;
- The mobile auger mixer was invented in 1964 by Harold Zimmerman, Ephrata, PA USA. His design allowed all of the ingredients (sand, stone, water, and cement) necessary to produce the concrete to be stored in separate bins and compartments directly on the batching unit.
- The drum for trailer mounted volumetric mixer was designed in 1979, by Fred Caron and Neal Surry, Sacramento, California USA. They mimicked the larger transit-mix truck's mixing drum, on a smaller scale and loaded the drum from a batching unit that metered the volume.
- The paddle mixers exact history is unrecorded, but these volumetric mixers have been in use by masons for at least 50-years. Usually these produce smaller batches.
Read more about this topic: Volumetric Concrete Mixer
Famous quotes containing the word history:
“To a surprising extent the war-lords in shining armour, the apostles of the martial virtues, tend not to die fighting when the time comes. History is full of ignominious getaways by the great and famous.”
—George Orwell (1903–1950)
“If you look at history you’ll find that no state has been so plagued by its rulers as when power has fallen into the hands of some dabbler in philosophy or literary addict.”
—Desiderius Erasmus (c. 1466–1536)
“All things are moral. That soul, which within us is a sentiment, outside of us is a law. We feel its inspiration; out there in history we can see its fatal strength.”
—Ralph Waldo Emerson (1803–1882)