| 摘要 |
PROBLEM TO BE SOLVED: To produce a composition suitable to add water for producing a water resistant hydraulic solid. SOLUTION: (a) Calcium sulfate semihydrate, (b) Portland cement and (c) a calcined clay having a pozzolan activity (in which metakandite is incorporated preferably) are incorporated as a component. A weight ratio of the component (a), (b) and (c) in the composition is 20-98wt.% (a), 1-5wt.% (b) and 1-30wt.% (c), and the sum of the component (a), (b) and (c) is 100%. |
