When was ready-mixed concrete discovered?
Concrete was already used by the Romans more than 2000 years ago.
It was then called "opus caementitium".
| opus ... |
|
masonry, building, building method |
| caementitium ... |
|
dressed stone, aggregate |
In the Middle Ages, this building material was hardly ever used.
During the 20th century, concrete experienced a rapid development:
| 1903 |
Imperial Patent for a procedure to store
ready-mixed concrete for a longer period of time by cooling
it to below 0 °C (idea: Jürgen Heinrich Magens)
Foundation of a ready-mixed concrete plant in Hamburg by Magens
Means of transport to the placement site was the horse carriage |
| 1925 |
After Magen's death, for the time being, the
era of ready-mixed concrete in Germany ends |
after the Second
World War |
More economic and better vehicles |
| 1954 |
Foundation of two RMC plants in Cologne and
Stuttgart |
| 1999 |
approx. 2000 RMC plants in Germany |
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