Removes the waterproof layer of concrete structures that are semi-permanently attached to the concrete structure and do not leak substances harmful to the human body. Ball. The waterproof layer extends in at least one direction on the surface of the first groove and is formed independently of each other. A reinforcing material in the form of a mesh located on the concrete base layer formed by forming second grooves or in combination with each other is used. It includes an anchor to fix the material layer. Filling the grooves of the base layer with the reinforcement and anchor between them, Silicic acid that forms a flat surface on the plaster layer while reinforcing the surface of the plaster layer by being absorbed in the pores of the covering concrete plaster layer It is located on the first modified layer formed by drying the aqueous solution containing sodium salt and dried the aqueous solution containing silicon. It includes the formed second modified layer.
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