Possibility of the modification of the properties of sulfoaluminate belitecement by its blending

The results obtained showed the possibility of the blending of sulfoalumina te belite (SAB) cement by mineral admixture, like fly ash, silica fume,and basic blast furnace slag when reaching satisfied engineering proper ties 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 tha n the optimum at Portland cement blends with values between 20 and 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 t he blending opposite to the original SAB cement was observed. This strength decrease of the studied blends represents the values between 4-20% dependi ng on the kind of the admixture and its quantity in the blend.