| abstract |
(57) [Summary] [Purpose] Civil engineering works such as for spraying tunnels or stopping spring water To provide a cement quick-setting material used in the construction field. [Constitution] Calcium aluminate obtained by heat-treating CaO raw material, Al 2 O 3 raw material, and R 2 O raw material, and potassium and / or lithium in the raw material is 1% by weight or more in terms of potassium or lithium oxide. And a cement quick-setting material containing inorganic salts, and a cement composition containing cement and the cement quick-setting material. [Effect] The use of the cement quick-setting material of the present invention has effects such as good quick-setting property, resistance to spring water, economical, and good quick-setting property at low temperature. |