| 摘要 |
The invention relates to a clinker substitute having the following composition: 31-48 % and preferably 38-46 % CaO, 25-40 % SiO2, and 13-24 % Al2O3. According to the invention, said substitute contains at least 1 %, preferably 3-14 % SO3 as sulphate which is burnt during the production of the clinker substitute. This increases the early strength. This effect is intensified if the clinker substitute has a Blaine fineness of at least 6,000 cm²/g and preferably at least 7,000 cm²/g. The clinker substitute portion preferably makes up 20-60 % of a cement. |
