| 摘要 |
PROBLEM TO BE SOLVED: To provide a quick hardening additive material for cement post-added to cement, excellent in hydration activity, exhibiting good quick hardening property as well as capable of sufficiently securing predetermined flowability even under low temperature and a manufacturing method therefor.SOLUTION: There is provided a quick hardening additive material for cement which is post-added to cement, contains C12A7-based mineral phase of 70 mass% or more, C3A of 5.0 mass% or less, Ti of 1.0 mass% or less in terms of TiO, Mg of 3 to 9 mass% in terms of MgO, Fe of 1.5 mass% or less in terms of FeOand has crystallite diameter of the C12A7-based mineral phase measured by an X ray diffraction of 150 to 500 nm and lattice constant of the C12A7-based mineral phase of 11.940 to 11.975Å and preferably further contains F of 0.5 to 3.0 mass%.SELECTED DRAWING: None |
