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81. 发明专利

JPH09142959A METHOD FOR REGENERATING CONCRETE STRUCTURE 失效
公开(公告)号：JPH09142959A
公开(公告)日：1997-06-03
申请号：JP29973595
申请日：1995-11-17
申请人： DENKI KAGAKU KOGYO KK
发明人： ASHIDA KIMINOBU , SAKAI HIROTOMO
IPC分类号： E04G23/02 , C04B41/45 , C04B41/60
摘要： PROBLEM TO BE SOLVED: To assure the sufficient durability of a concrete structure by subjecting the concrete having the damage to deterioration to an electrochemical treatment to get rid of the cause for the deterioration, then applying an adequate coating on the surface of the concrete. SOLUTION: This method for regenerating the concrete structure comprises using the steel product 1 in the concrete of the concrete structure as an internal electrode and the electrodes installed on the surface part of the concrete structure as external electrodes 5 and subjecting the concrete structure to the electrochemical treatment to pass currents between the external electrodes 5 and/or between the external electrodes 5 and the internal electrode, then coating the surface of the concrete structure. The timing for applying the surface coating is elucidated, by which the error and trouble in the application are prevented and the safe execution of the work is assured.

82. 发明专利

JPH08104581A REPAIRING METHOD OF CONCRETE 失效
公开(公告)号：JPH08104581A
公开(公告)日：1996-04-23
申请号：JP24163594
申请日：1994-10-05
申请人： DENKI KAGAKU KOGYO KK
发明人： ISHIBASHI KOICHI , ASHIDA KIMINOBU
IPC分类号： E04G23/02 , C04B41/45 , C04B41/60
摘要： PURPOSE: To prevent the generation of rust on a steel in a concrete by applying current through an electrolyte solution between an external electrode attached on the surface of the concrete and the steel in the inside of the concrete. CONSTITUTION: The external electrode 3 composed of Ti (alloy), Pt or a Ti or Pt plated metal or the like is attached on the surface of the concrete 1, the steel 4 in the inside of the concrete is used as the internal electrode and an electrolyte holding material 2 impregnated with the electrolyte solution is arranged on the surface of the concrete 1. And current is applied through the electrolyte holding material 2 between the external electrode 3 and the steel 4 and is stopped when the hydrogen ion concn. and/or the molar concn. ratio of chloride ion to hydroxide ion in the vicinity of the steel in the inside of the concrete reaches respectively pH>=10 and/or

83. 发明专利

JPH0881287A PRODUCTION OF COATING FILM ON SURFACE OF STEEL MATERIAL IN CONCRETE STRUCTURE BY UTILIZATION OF ELECTROCHEMICAL TREATMENT 失效
公开(公告)号：JPH0881287A
公开(公告)日：1996-03-26
申请号：JP22156794
申请日：1994-09-16
申请人： DENKI KAGAKU KOGYO KK
发明人： SAKAI HIROTOMO , ASHIDA KIMINOBU
IPC分类号： E04G23/02 , C04B41/51 , C04B41/60
摘要： PURPOSE: To enable to safely repair event an already constructed concrete structure at a low cost by bringing the surface of the concrete structure into contact with a plating solution and subsequently applying an electric current between an outer electrode in the plating solution and an inner electrode in the concrete structure. CONSTITUTION: The surface of a concrete structure is brought into contact with a plating solution containing a noble metal as a main ingredient and/or a plating solution containing a metal having a poorer standard electrode potential than the standard electrode potential of a steel material inside the concrete structure, and an electric current is applied between an outer electrode set in the plating solution and an inner electrode comprising a steel material in the concrete structure, thus plating the metal on the surface of the steel material as its anticorrosive treatment by the electrochemical treatment. For example, a disk-like neutral concrete specimen 5 is set in a cylindrical container 2, and a titanium/platinum-plated outer electrode 7 as a plus electrode for the treatment and a minus steel plate electrode 6 as the inner steel material are set. The plating solution comprises V that containing Pd, Zn or Sn, and the production of the plating film produced on the surface of the steel material is detected by the increase in the weight of the steel plate electrode 6.

84. 发明专利

JPH0840784A METHOD FOR TREATING CONCRETE 失效
公开(公告)号：JPH0840784A
公开(公告)日：1996-02-13
申请号：JP17719594
申请日：1994-07-28
申请人： DENKI KAGAKU KOGYO KK
发明人： ASHIDA KIMINOBU , ISHIBASHI KOICHI
IPC分类号： E04G23/02 , C04B41/45 , C04B41/60
摘要： PURPOSE:To effectively carry out desalination from concrete damaged by salts and re-provision of alkalinity to neutralized concrete by feeding an electrolyte solution containing a water-soluble lithium compound to the concrete under specific conditions in an electrochemical treating method of concrete. CONSTITUTION:This method for treating concrete is to feed an electrolytic material containing a water-soluble lithium compound between surface electrodes and/or between the surface and an internal electrodes and keep a molar ratio of lithium to sodium in the concrete to >=0.1 in a method for applying electric current to the concrete between these electrodes using a steel material in the concrete of a concrete structure as the internal electrode and an electrode mounted on the surface part of the concrete as the surface electrode, respectively. The lithium ion concentration of the electrolytic solution is preferably >=1mol/L.

85. 发明专利

JPH07315960A ELECTROCHEMICAL TREATMENT OF CONCRETE 失效
公开(公告)号：JPH07315960A
公开(公告)日：1995-12-05
申请号：JP11811394
申请日：1994-05-31
申请人： DENKI KAGAKU KOGYO KK
发明人： ASHIDA KIMINOBU , OTSUKA TETSUO
IPC分类号： E04G23/02 , C04B41/45 , C04B41/60
摘要： PURPOSE:To provide an electrochemical treating method of a concrete, particularly a method for electrochemically removing salt portion in the concrete and/or a method for supplying an alkaline solution to the neutralized concrete. CONSTITUTION:In a method for passing current between external electrodes and/or the external electrode and an internal electrode by using an electrode provided on the surface of the concrete as an external electrode and steel in the inside of the concrete as an internal electrode, an electrolytic solution and the external electrode are held in a space formed between the concrete and a plate combined with a softening agent. As a result, pollution to environmental atmosphere due to the scattering of a cellulose fiber to the surroundings in spray working is dissolved and the extremely reducing effect of the industrial waste after processing is also expected. Further, since the plate, the softening agent and a metallic reinforcing material are easily prepared in the job site and are easily assembled, the work in the job site is simplified.

86. 发明专利

JPH07109186A REGENERATION OF CONCRETE AND ELECTROLYTIC MATERIAL THEREFOR 失效
公开(公告)号：JPH07109186A
公开(公告)日：1995-04-25
申请号：JP35923691
申请日：1991-12-27
申请人： DENKI KAGAKU KOGYO KK
发明人： ASHIDA KIMINOBU , YAMAGISHI TAKANORI , HANDA MINORU
IPC分类号： E04G23/02 , C04B41/45 , C04B41/65
摘要： PURPOSE:To dissolve problems about neutralization of a concrete structure to the inside part and salt damage and improve durability by using an alkaline solution not substantially containing sodium or potassium as an electrolytic material and preventing deterioration of the concrete structure. CONSTITUTION:An alkaline solution containing, e.g. a hydroxide or a carbonate of an alkaline metal (especially lithium) except sodium and potassium, an alkaline earth metal, ammonia, etc., a nitrite of lithium, calcium, etc., or an amine such as guanidine or hydroxylamine and having pH >=10 is used as an electrolytic material 6. This electrolytic material is brought into contact with the concrete surface by using a tank 5 equipped so as to accommodate it or after absorbing it into an absorbent material such as pulp or cloth. A steel material in the inside of the concrete and an electrode set through the electrolytic solution 6 are used respectively as an inner electrode 3 and a surface electrode 7 and an electric current from a direct current power source 8 is allowed to flow between the inner electrode 3 and the surface electrode 7 with a current density of 0.5 to 10 A per 1m surface area of the concrete for about one week to a half year, thus regenerating the concrete.

87. 发明专利

JPH06341985A DIAGNOSING METHOD FOR HARDENED CEMENT BODY 失效
公开(公告)号：JPH06341985A
公开(公告)日：1994-12-13
申请号：JP23064592
申请日：1992-08-31
申请人： NISHINIPPON RYOKAKU TETSUDO KK , DENKI KAGAKU KOGYO KK
发明人： MIYAGAWA TOYOAKI , KIKUCHI YASUTAKA , KITAGO YUKIO , ASHIDA KIMINOBU , ISHIBASHI KOICHI
IPC分类号： G01N15/08 , G01N27/00 , G01N33/38
摘要： PURPOSE:To provide a diagnosing method for nonreinforced concrete, reinforced concrete using a reinforcing for or PC steel as a reinforcing material, prestressed concrete, cement mortar and cement paste. CONSTITUTION:A cement hardened body diagnosing method is carried out in such a way as after electrolyte solution containing a diagnosing material is inserted in an open hole A bored in a hardened cement body, and the electrolyte solution containing no diagnosing material is inserted in an open hole B, a direct current is applied between the open holes A, B to move the diagnosing material from the open hole A to the open hole B, and then the diagnosing material contained in the electrolyte solution in the open hole B is analyzed. In this method, since ion is electrically moved, and moves at much higher speed in comparison with dispersing speed in a natural state, the closely densified degree of the hardened concrete body can be diagnosed in a very short time in comparison with dispersion in the natural state.

88. 发明专利

JPH0673897A RECLAIMING METHOD OF CONCRETE 失效
公开(公告)号：JPH0673897A
公开(公告)日：1994-03-15
申请号：JP22551192
申请日：1992-08-25
申请人： DENKI KAGAKU KOGYO KK
发明人： OOTSUKI NOBUAKI , ASHIDA KIMINOBU , ISHIBASHI KOICHI
IPC分类号： E04G23/02
摘要： PURPOSE:To recover alkalinity in concrete and remove chlorine ion without corroding reinforcement so as to reclaim concrete by allowing direct current to flow between electrodes provided on the concrete surface. CONSTITUTION:Titanium meshes 6 and a sponge 4 are laid in a plastics vessel 1, a concrete specimen 2 is placed thereon, and further a sponge 4 sufficiently containing lithium sulfite water solution and reinforcement meshes 5 are placed thereon. The titanium meshes 6 is set as a positive electrode, the reinforcement meshes 5 is set as a negative electrode, and direct current is let flow through the concrete 2. As a result of this, a PC steel bar 3 is not suffered from hydrogen embrittlement, and salinity content in the concrete is remarkably decreased. In this way, by providing electrodes on two or more positions of the surface of a concrete structure and letting flow diret current between the electrodes, the concrete can be reclaimed without generating hydrogen embrittlement in the reinforcement.

89. 发明专利

JPH0624871A METHOD FOR RESTORING ALKALINITY OF CONCRETE HAVING NEUTRALIZED PART 失效
公开(公告)号：JPH0624871A
公开(公告)日：1994-02-01
申请号：JP8477293
申请日：1993-04-12
申请人： DENKI KAGAKU KOGYO KK
发明人： ASHIDA KIMINOBU , ISHIBASHI KOICHI , YAMAGISHI TAKANORI
IPC分类号： C04B41/60 , C04B41/00 , E04G23/02
摘要： PURPOSE:To restore the alkalinity of a neutralized concrete structure, especially the alkalinity of the ferroconcrete structure with the reinforcing bar and PC steel as the reinforcement and prestressed concrete structure. CONSTITUTION:A current at the density of 0.1-10A per m of the concrete surface area is applied to the surface of a concrete to restore the alkalinity of the neutralized part of the concrete. A steel material 1 at the neutralized part of concrete 2 is used as an internal electrode, an external electrode 5 in an alkaline atmosphere is formed on the concrete surface, and a power is impressed between both electrodes at a current density of 0.1-10A per m of the concrete surface area.

90. 发明专利

JPH0340979A FLUORORESIN-BASED FILM-COATED CEMENT FORMED MATERIAL AND ITS PRODUCTION 失效
公开(公告)号：JPH0340979A
公开(公告)日：1991-02-21
申请号：JP17411789
申请日：1989-07-07
申请人： DENKI KAGAKU KOGYO KK
发明人： MORIYA YOSHIHISA , ASHIDA KIMINOBU , SAZUKA MASATARO
IPC分类号： C04B41/63 , B28B1/16 , C04B41/71
摘要： PURPOSE:To improve the durability of a cement formed material by coating the material with a laminate of a fluororesin or an reinforcing base layer and fluororesin or an anchor layer, a reinforcing base and a film consisting essentially of a fluororesin. CONSTITUTION:Various additives are added to a fluororesin such as a vinylidene fluoride-tefrafluoroethylene copolymer, and the mixture is formed into a film having 0.1-500mum thickness. A cement formed material is coated with the film in one or >=2 layers. The material can be coated with a laminate of a reinforcing base selected from a thermoplastic or thermosetting resin film, a metallic sheet, a rubber product and a nonwoven fabric and having 0.005-20mum thickness and a fluororesin film. Furthermore, an anchor layer having 1-100mm thickness and selected from a thermoplastic resin formed material, a metallic formed material and a fibrous material is formed sporadically or continuously on the rear surface of the base layer, the kneaded material of a cement formed material is driven in, and a durable fluororesincoated cement formed material is obtained.

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