Cation concentration increasing agent, modifying agent for concrete structure, method for manufacturing same, and method for repairing concrete structure

Abstract

A modifying agent of an alkaline electrolyzed water. A substance being supplied to a concrete structure in order to produce calcium silicate for repairing concrete and including an alkali metal silicate is defined as a concrete protective agent. The modifying agent is supplied to the concrete structure in advance of the supply of the concrete protective agent. The alkali metal silicate and the calcium ion included in the concrete protective agent contribute to the production of the calcium silicate. A method for repairing a concrete structure includes supplying the concrete protective agent to the concrete structure and supplying a modifying agent for a concrete structure including an alkaline electrolyzed water to the concrete structure, the step of supplying a modifying agent being performed before the step of supplying the concrete protective agent to promote production of the calcium silicate in the step of supplying the concrete protective agent.

1 . A modifying agent for a concrete structure comprising an alkaline electrolyzed water. 
     
     
         2 . The modifying agent for a concrete structure according to  claim 1 , wherein the modifying agent further comprises a calcium ion. 
     
     
         3 . The modifying agent for a concrete structure according to  claim 2 , wherein the alkaline electrolyzed water has a pH of 11 or more. 
     
     
         4 . The modifying agent for a concrete structure according to claim wherein the calcium ion concentration is 10 mg/L or more. 
     
     
         5 . A method for manufacturing a modifying agent for a concrete structure including an alkaline electrolyzed water including a calcium ion dissolved therein, the method comprising:
 an electrolysis step of performing electrolysis of water including a water-soluble calcium-containing compound, and at least one of a chloride ion and a hydrogen carbonate ion.   
     
     
         6 . A cation concentration increasing agent for increasing the concentration of a cationic ion in a solution, the agent comprising an alkaline electrolyzed water. 
     
     
         7 . The cation concentration increasing agent according to  claim 6 , wherein the solution is a modifying agent for a concrete structure.