PRACTICAL APPLICATION OF ELECTRODEPOSITION METHOD FOR THE CRACK REPAIR OF REINFORCED CONCRETE STRUCTURE ON LAND AND UNDERGROUND.

1.用化学和电化学方法验证了混凝土裂缝修补后的电沉积机理，证实了该方法适用于陆基钢筋混凝土构件.电沉积法可以封闭底梁和地梁的裂缝.下构件的镀层封闭深度小于陆基构件.通过现场试验，确定了合适的电沉积条件，可以封闭陆地上现有钢筋混凝土构件的渗水裂缝.本文研究了电沉积法修复钢筋混凝土的耐久性。结果证实，即使在2年暴露期后，修复效果也可以保持。电沉积混凝土在暴露2年后的表观透水性比未电沉积混凝土的表观透水性小得多.电镀混凝土在暴露2年后具有稳定的闭合裂缝条件，因为它被适当地密封并涂覆有电镀物。从耐久性的角度，试验结果表明，电沉积法具有裂缝闭合效应、再碱化效应和防腐效应，能稳定钢筋混凝土构件的修复截面，是一种可靠的裂缝修复方法。

1. THE USE OF CHEMICAL AND ELECTROCHEMICAL PROCESS IN VERIFYING THE MECHANISM OF ELECTRODEPOSITION IN A CRACK-REPAIRED REINFORCED CONCRETE CONFIRMED THE SUITABILITY OF THIS METHOD FOR LAND-BASED REINFORCED CONCRETE MEMBER.2. BOTH OF CRACKS IN UNDER GROUND MEMBER AND LAND-BASED MEMBER COULD BE CLOSED BY ELECTRODEPOSITION METHOD.3. THE CLOSURE DEPTH OF ELECTRODEPOSITS OF UNDERGROUND MEMBER WAS SMALLER THAN THAT OF LAND-BASED MEMBER.4. THE CRACKS WITH WATER LEAKAGE IN AN EXISTING REINFORCED CONCRETE MEMBER ON LAND COULD BE CLOSED USING THE APPROPRIATE ELECTRODEPOSITION CONDITIONS THROUGH THE FIELD TEST.5. IN THIS RESEARCH THE DURABILITY OF REINFORCED CONCRETE REPAIRED BY ELECTRODEPOSITION METHOD WAS INVESTIGATED. AS A RESULT, IT WAS CONFIRMED THAT THE REPAIR EFFECT CAN BE KEPT EVEN AFTER 2-YEARS PERIOD EXPOSURE.6. THE APPARENT WATER PERMEABILITY OF ELECTRO-DEPOSITED CONCRETE AFTER 2-YEAR PERIOD EXPOSED WAS MUCH SMALLER THAN THAT OF NON-ELECTRODEPOSITED CONCRETE WITH CRACK.7. ELECTRODEPOSITED CONCRETE AFTER 2-YEAR PERIOD EXPOSED HAD A STABLE CLOSED CRACK CONDITION BECAUSE IT WAS PROPERLY SEALED AND COATED WITH ELECTRODEPOSITS.8. FROM THE VIEWPOINT OF DURABILITY, THE RESULTS OF THE EXPERIMENTAL INVESTIGATIONS INDICATED THAT ELECTRODEPOSITION METHOD WAS AN EFFECTIVE CRACK REPAIR METHOD BECAUSE IT HAD A CRACK CLOSING EFFECT, RE-ALKALIZATION EFFECT, AND CORROSION PROTECTION EFFECT THAT STABILIZED THE REPAIRED SECTION OF REINFORCED CONCRETE MEMBER.