| 摘要 |
<p>The binder mix for use with water and, if appropriate, aggregates and additives consists of: a. Portland cement clinker in a quantity of 75 to 95 % by mass, b. reactive calcium aluminates in the form of CA, C12A7 and/or alumina cement in a quantity of 5 to 25 % by mass, and additionally the following components, relative to components a and b forming 100 % by mass, c. reactive calcium sulphate in a quantity of 2.5 to 4 % by mass, d. an organic setting retarder, which inhibits the nucleation and growth of calcium aluminate sulphate, in a quantity of 0.1 to 1 % by mass and e. an alkali metal carbonate in a quantity of 0.2 to 0.8 % by mass of Na2O equivalent, the total CaO content being adjusted at least in such a way that no metastable or low-lime hydrated calcium aluminates or ferrites can be formed.</p> |
