Patent ID: 7771507

Claim:
A hydraulic mineral composition comprising: a vitreous or crystallised matrix based on calcium and magnesium silico-aluminates, accounting for at least 25% by weight of the composition, mineral oxides and optionally one or several mineral halides selected from oxides and halides of Ti, V, Cr, Mn, Co, Ni, Cu, Pb, Ba, Sr, P, S, Na, K, Zr, Mo, Be, Tl, As, Sn and Cd, a total amount of said mineral oxides and optionally one or several mineral halides accounting for at least 5% by weight of the composition, at most 31% by weight of alumina (Al 2 O 3 ), less than 10% by weight of ferrite (calcium aluminoferrite), and less than 0.05% by weight of C compared with the weight of the composition, wherein, in % by weight compared to the total weight of the composition, said mineral oxides comprise titanium oxide from 0.1 to 10%; vanadium oxide from 0.2 to 0.5%; chromium oxide from 0 to 0.5%; manganese oxide from 0.5 to 5%; cobalt oxide from 0.01 to 0.5%; nickel oxide from 0.01 to 0.5%; copper oxide from 0.1 to 2%; lead oxide from 0.001 to 0.01%; barium oxide from 0.1 to 2%; strontium oxide from 0.1 to 2%; phosphorus oxide from 0.1 to 2%; sulphur oxide from 0.2 to 3%; sodium oxide from 0.5 to 10%; potassium oxide from 0.5% to 10%; zirconium oxide from 0.01 to 0.1%; molybdenum oxide from 0.01 to 0.1%; thallium oxide from 0.01 to 0.1%; tin oxide from 0.01 to 0.1%; cadmium oxide from 0.0002 to 0.005%; and arsenic oxide from 0.0001 to 0.002%, and wherein in % by weight compared to the total weight of the composition, the composition comprises zinc oxide from 0.1 to 2%.