| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a quick-hardening mortar for plasterers not drooping even if increasing a water binder ratio, and having small electric resistance and small contraction, and to provide a corrosion prevention method by the same, for further reducing the contraction, maintaining the small electric resistance for a long period, and not disturbing permeation of chlorine gas or the like. <P>SOLUTION: The quick-hardening mortar for plasterers having the small electric resistance uses a quick-hardening mortar composition wherein a binder containing cement and a quick-hardening material, fine aggregate, a water reducing agent, and water are blended, can be obtained by adding water-soluble acrylic polymers and aluminum sulfate to a mortar having a no-tapping mortar flow value of 200-320 mm prepared by use of a mortar composition having the water binder ratio of 30-55% and a unit water amount of 250-400 kg/m<SP POS="POST">3</SP>, and kneading them, and has a contraction amount ≤-800×10<SP POS="POST">-6</SP>. A hardened body of the quick-hardening mortar for plasterers has electric resistivity ≤100 kΩcm. A quick-hardening mortar hardened body is formed by coating an organic-inorganic composite coating-film curing agent on the surface of the hardened body of the quick-hardening mortar for plasterers. The corrosion prevention method for steel material inside a concrete structure uses the quick-hardening mortar hardened body. <P>COPYRIGHT: (C)2012,JPO&INPIT |
