| 摘要 |
PURPOSE:To provide a super fast hardening concrete with high initial strength excellent in workability and durability, etc. CONSTITUTION:The super fast hardening cement composition is obtained by incorporating 2-10 pts.wt, in terms of CaSo4, hemihydrate gypsum and/or anhydrous gypsum with 100 pts.wt,. of a Portland cement containing 60-75wt.% Ca silicate (C3S), and has 5000-7000cm<2>/g the fineness of the prescribed Portland cement in a Blaine specific area and 6000-8000cm<2>/g the fineness of the prescribed gypsum in a Blanie specific area. |
