Temperaturinduktion in Betontragwerke: Experimentelle Untersuchungen zur Methode.

De-icing of bridge decks, control of hardening or concrete strengthening through tempering are promising applications for active temperature induction into RC structures. The paper introduces fundamental approaches and devices: heating with infrared radiators, heating pads, heated water and Peltier elements, cooling liquids and dry ice, are discussed by means of nominal electric powers, attachment to the structure, interaction of device and structure, temperature control and potential losses. The characteristics of the approaches are analyzed and rated. A test series on insulated beams serves for reference. The alternative approaches are separately applied and combined to induce temperature gradients. Heating pads and infrared radiators are most suited for heating while Peltier elements and liquids are beneficial for cooling. From comparison recommendations for practical application are derived. [ABSTRACT FROM AUTHOR]