An alkaline aluminoferrosilicate hydraulic cement contains water, calcinated dolomite, portland cement clinker, metallurgical slag selected from nonferrous, blast furnace electrothermophosphorous, reactive silica, and alkali metal compounds. The calcinated dolomite essentially consists of, in % by weight, 50 to 55 CaO and 30 to 35 Mg0 and is obtained by sintering a dolomite CaMg(CO₃)₂ at a temperature of between 800° and 950°C until CaC0₃ and MgC0₃ have undergone full decomposition. The reactive silica is a silica fume, fly ash from coal combustion, amorphous silica or silicic acid. The alkali metal compound is a K, Na or Li compound causing an alkaline reaction in an aqueous medium, or a mixture thereof. A bonding matrix obtained from the blended alkaline aluminoferrosilicate hydraulic cement after mixing with water essentially consists of the molecular formula:



        (Li, K, Na)_1-8Mg_0-3Ca_4-15[Al_1-4Fe²⁺_3-0Fe³⁺_2-16Si_{6- 24}O_15-50](8-15)H₂0

The cement is produced by mixing in a certain sequence all of the components. The cement can be used as a neat cement or with fillers, such as sand, gravel, slags, crushed serpentinite rock to make mortars and concrete, standing out for a high abrasion resistance, good adhesion to metals and protective properties against gamma and neutron radiation.

An alkaline sulfoaluminosilicate hydraulic cement contains water, calcium magnesium aluminosilicate glass, portland cement clinker, sinter made from sodium zeolite and an SO₄^2--containing component, metakaolin and alkali metal compounds. Used as zeolites may be either synthetic zeolite and zeolite-containing rock in which the main rock-forming minerals are clinoptilolite, mordenite, gmelinite and analcime at their total content in the rock not less than 40 % by weight. Used as a SO₄^2--containing component is a technical product, Na₂SO₄ or natural raw materials, by-products or aluminopotassium alums. The sinter is obtained by thermal activation in the temperature range 500° to 800°C of sodium zeolite and SO₄^2--containing component taken in a ratio ranging between 1:1 to 4:1. The metakaolin is obtained by sintering a kaolinite clay in the temperature range 700-800° C until its full dehydration. The alkali metal compound are compounds that create an alkaline reaction in an aqueous medium. A bonding matrix obtained from the alkaline sulfoaluminosilicate hydraulic cement upon mixing with water is characteristic of the presence of alkaline sulfoaluminate and sulfoaluminosilicate phases. The cement is produced by mixing in a certain sequence all the constituents and sets in both normal conditions and under heat curing. The cement can be used as a neat cement or with fillers, such as sand, crushed stone and gravel, to make mortars and concrete, that are characteristic of high sulfate resistance, stable strength characteristics under alternate wetting-drying as well as low shrinkage along with high compressive strength and rapid strength gain.

L'invention concerne de nouvelles résines minérales durcissables à base de boroaluminosilicates alcalins qui comprennent, avant durcissement, les éléments minéraux à l'état réactif, dans les proportions suivantes exprimées par leur rapport molaire d'oxydes :$$\text{2 ≦ SiO₂/Al₂O₃ ≦ 4}$$$$\text{1,3 ≦ X₂O/Al₂O₃ ≦ 3,8}$$$$\text{10 ≦ H₂O/Al₂O₃ ≦ 28}$$$$\text{0,5< B₂O₃/Al₂O₃ ≦ 2,0}$$

X₂O représentant un ou plusieurs oxydes alcalins choisis parmi Na₂O, K₂O, Li₂O, et éventuellement des charges.

L'invention concerne également le procédé de préparation de ces nouvelles résines minérales.

Les résines durcies obtenues sont très utiles pour fabriquer des matériaux de protection thermique.