| 摘要 |
PROBLEM TO BE SOLVED: To produce the cement composition exhibiting extremely high fluidity without causing separation of materials and fluidity decrease during the execution of the work, thus useful for production of a concrete manifesting high fluidity and high strength and as a self-leveling material. SOLUTION: This concrete composition consists of a clinker containing <=13wt.% of 4CaO.Al2 O3 .Fe2 O3 , <=5wt.% of 3CaO.Al2 O3 , the rest is 3CaO.SiO2 , 2CaO.SiO2 and 3-7wt.% of calcium sulfate and has 3000-4500cm<2> /g of Blaines specific surface area. The calcium sulfate consists of 10-35wt.% of gypsum hemihydrate, 20-45wt.% of insoluble calcium sulfate anhydrate and the rest is gypsum dihydrate, and high performance AE water reducing agent is added to this composition. |
