Ceramics-Silikáty 45, (1) 24 - 30 (2001)

The results obtained showed the possibility of the blending of sulfoaluminate belite (SAB) cement by mineral admixtures, like fly ash, silica fume, and basic blast furnace slag when reaching satisfied engineering properties of the blend. The optimum of the addition of the mineral admixture in the SAB cement blends representing the value ca 15 wt.% is significantly lower than the optimum at Portland cement blends with values between 20 to 40 wt.%. This is caused by the decreased production of calcium hydroxide during SAB cement hydration. It has been found that the blending practically did not influence settings. On the contrary, very well known strength decrease by the blending opposite to the original SAB cement was observed. This strength decrease of the studied blends represents the values between 5-20 % depending on the kind of the admixture and its quantity in the blend.