A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
In dielectric heating, the specimen is placed in an electromagnetic field that alternates at high frequency. Electrically charged molecules and ions start to vibrate and the temperature of the material rises. The domestic microwave oven is an example of this phenomenon. Microwave radiation penetrated fresh concrete to a depth of about 2 cm only. Penetration with radio frequency was far better. A radio frequency heater was found to be an effective heater for concrete. The following conclusions can be drawn from the results: A whole mass of concrete can be heated simultaneously. With this heater it is possible to raise the concrete temperature to 50 deg C to 60 deg C in just a few minutes (3 minutes to 4 minutes).
In dielectric heating, the specimen is placed in an electromagnetic field that alternates at high frequency. Electrically charged molecules and ions start to vibrate and the temperature of the material rises. The domestic microwave oven is an example of this phenomenon. Microwave radiation penetrated fresh concrete to a depth of about 2 cm only. Penetration with radio frequency was far better. A radio frequency heater was found to be an effective heater for concrete. The following conclusions can be drawn from the results: A whole mass of concrete can be heated simultaneously. With this heater it is possible to raise the concrete temperature to 50 deg C to 60 deg C in just a few minutes (3 minutes to 4 minutes).
Radio wave heater for concrete
Erwärmen von Beton mit Radiowellen
Leivo, M. (author)
Cement and Concrete Research ; 26 ; 677-682
1996
6 Seiten, 3 Bilder, 3 Quellen
Article (Journal)
English
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