INSPECTION FOR DEFECTIVE COVERING OF REINFORCED CONCRETE STRUCTURE

摘要

PURPOSE:To promote the repairing and reforming treatment of a reinforced concrete structure by a method in which electric current is allowed to flow in reinforcing bars through a conductor connected to the reinforcing bars to a foundation, and Joule's heat produced in the reinforcing bars is detected by an infrared sensor to inspect deteriorated portions. CONSTITUTION:Reinforcing bars 1 to make up the column of a structure are combined with reinforcing bars to make up a beam, and concrete is placed to form a column 3 and a beam 4. Conductors 5 connected to the bars 1 and 2 are buried in the concrete and the other ends of the conductors 5 are connected to a power source to supply a given level of current. Joule's heat produced in the bars 1 and 2 is detected and observed by an infrared camera 6. Difference in covering of concrete and defect of structure and quality are judged from picture patterns taken by the camera 6. Even for existing structures, conductors 5 are connected to the internal reinforcing bars by forming cut grooves and the judgement of defects is made likewise.