| 摘要 |
PURPOSE:To prevent an efflorescent phenomenon by mixing cements with specific zeolite powder and hardening the resultant mixture. CONSTITUTION:An aqueous solution of sulfuric acid is added to neutralize synthetic zeolite so that pH may be 5.0. Thereby, hydrogen type zeolite powder is obtained. The aforementioned hydrogen type zeolite having <=44/mum grain diameter, partially hydrogenated type zeolite powder or mineral powder containing the hydrogen type zeolite in an amount of >=1-2% is added to cements, kneaded, cast into a frame mold, hardened and then cured. |
