Title:
ELECTROCHEMICAL TREATMENT OF CONCRETE
Document Type and Number:
Japanese Patent JP3216756
Kind Code:
B2
Abstract:
PURPOSE: To provide a low-cost electrochemical treatment of concrete characterized by discharging an electrolyte solution from nozzles to the surface of concrete and concurrently passing a current between external electrodes and/or between each of external electrodes and a specific internal electrode through applying a voltage between these electrodes.
CONSTITUTION: The plural nozzles 6 made of a corrosion-resistant material such as Ti alloy, etc., are fixed to the supporting rod 7 so as to allow them to contact with the surface of the neutralized concrete 1 or to form some space between each of the nozzles 6 and the surface of the concrete 1 and used as the external electrodes. The reinforcing bar in the inside of the concrete 1 is fitted with a white covered lead wire and used as the internal electrode and connected to the AC/DC converter 2 through the lead wire. Thereafter, an electrolyte solution such as Ca(OH)2 solution, etc., is transferred from the electrolyte solution tank 3 to the nozzles 6 through the pipe line 5 and discharged from the nozzles 6 under an about 0 to 5kg/cm2 discharge pressure so as not to break the electrical connection. In this state, the switch of the AC/DC converter 2 is turned on to subject the concrete 1 to electrochemical treatment by passing an about 0.01 to 5A, peferably 0.2 to 5A current per 1m2 of the concrete 1 between the electrodes for a prescribed time. Thus, the objective alkalinated concrete can be obtained.
Inventors:
Yoji Hara
Hideyuki Udagawa
Hideyuki Udagawa
Application Number:
JP9860894A
Publication Date:
October 09, 2001
Filing Date:
May 12, 1994
Export Citation:
Assignee:
DENKI KAGAKU KOGYO KABUSHIKI KAISHA
International Classes:
C04B40/00; C04B41/53; C04B41/60; E04G23/02; (IPC1-7): C04B41/60; E04G23/02
Domestic Patent References:
| JP5178678A | ||||
| JP5148061A |