SOLVENT FOR CEMENT, CEMENT PASTE, LAITANCE, ASBESTOS, PSEUDO FLOWER, WASTE MORTAR FINE POWDER, WASTE SLATE FINE POWDER AND WASTE CONCRETE FINE POWDER

摘要

PROBLEM TO BE SOLVED: To dissolve and remove cement paste, laitance, pseudo flower, waste cement, waste cement paste, waste asbestos, waste mortar fine powder, waste slate fine powder or waste concrete fine powder each attaching on a building, a constructed item or other cement-made products at any temperature except for a specified temperature without damaging and corroding the substrate of the item on which these materials attach.;SOLUTION: There are used (1) a transparent alkali solution having no precipitate and floating substance obtained by dissolving a polyaminocarboxylic acid, a hydroxide compound, boric acid and sugar in water and adding a dithionite and further a silicate and (2) a homogeneous solution obtained by adding and dissolving water or an alcohol and amidosulfuric acid in a nitrite. A problem is solved by means of scrubbing with steel wool or nonwoven fabric soaked with the solution, dissolving waste or coating without generating environment-damaging gas particularly for the former solution (1).;COPYRIGHT: (C)2002,JPO