A method for producing cementitious material involves mixing 100 parts by weight of a first mixture with 8 to 12 parts by weight of water to obtain a first slurry. The first mixture has, in a percentage by weight, 20 to 25% of a cement selected from Portland cement, limestone cement, slag cement, pozzolanic cement, composite cement and mixtures thereof, 0 to 6% of calcium sulfate, 65 to 80% of inert material, and 1 to 4% of SO.sub.3. A second slurry is obtained by mixing 100 parts by weight of a second mixture with 30 to 45 parts of water. The second mixture has, in a percentage by weight, 85 to 100% of a cement selected from calcium sulfoaluminate (CSA) cement, aluminous cement and mixtures thereof, 0 to 15% of inert material, and 5 to 13% of SO.sub.3. The second mixture is added to the first mixture with a weight ratio between 0.10 and 0.20.

A method for producing cementitious material involves mixing 100 parts by weight of a first mixture with 8 to 12 parts by weight of water to obtain a first slurry. The first mixture has, in a percentage by weight, 20 to 25% of a cement selected from Portland cement, limestone cement, slag cement, pozzolanic cement, composite cement and mixtures thereof, 0 to 6% of calcium sulfate, 65 to 80% of inert material, and 1 to 4% of SO.sub.3. A second slurry is obtained by mixing 100 parts by weight of a second mixture with 30 to 45 parts of water. The second mixture has, in a percentage by weight, 85 to 100% of a cement selected from calcium sulfoaluminate (CSA) cement, aluminous cement and mixtures thereof, 0 to 15% of inert material, and 5 to 13% of SO.sub.3. The second mixture is added to the first mixture with a weight ratio between 0.10 and 0.20.

The present disclosure concerns an aluminosilicate having a Blaine fineness of about 500 m.sup.2/kg to about 3000 m.sup.2/kg and/or a specific surface area of about 4 m.sup.2/g to about 20 m.sup.2/g, as well as the uses thereof. The present disclosure also comprises a dry cementing composition and a mortar or concrete composition, the compositions comprising said aluminosilicate. The present disclosure also comprises a process for the manufacture of aluminosilicate. The process comprises: roasting a spodumene concentrate in an acid medium; leaching the acidic roast spodumene concentrate so as to obtain a mixture comprising a solid comprising the aluminosilicate and a leachate; and separating the aluminosilicate from the leachate in an acid medium, wherein said aluminosilicate contains a calcium concentration of less than about 5%.

The present disclosure concerns an aluminosilicate having a Blaine fineness of about 500 m.sup.2/kg to about 3000 m.sup.2/kg and/or a specific surface area of about 4 m.sup.2/g to about 20 m.sup.2/g, as well as the uses thereof. The present disclosure also comprises a dry cementing composition and a mortar or concrete composition, the compositions comprising said aluminosilicate. The present disclosure also comprises a process for the manufacture of aluminosilicate. The process comprises: roasting a spodumene concentrate in an acid medium; leaching the acidic roast spodumene concentrate so as to obtain a mixture comprising a solid comprising the aluminosilicate and a leachate; and separating the aluminosilicate from the leachate in an acid medium, wherein said aluminosilicate contains a calcium concentration of less than about 5%.

The invention concerns construction materials based on a mineral binder, which include a synergistically effective hydrophobisation mixture. The invention also relates to methods for processing of such construction materials and the use of a synergistically effective mixture for the hydrophobisation of a mineral binder based construction material.

The invention concerns construction materials based on a mineral binder, which include a synergistically effective hydrophobisation mixture. The invention also relates to methods for processing of such construction materials and the use of a synergistically effective mixture for the hydrophobisation of a mineral binder based construction material.

The invention is directed to one or more sand free cement-based grout compositions that are highly resistant to wet abrasion removal. The one or more sand free cement-based grout compositions comprising calcium aluminate cement as a main binder in combination with one or more additional binders as well as one or more of the following ingredients: a single anhydrite binder, metakaolin, fine limestone, coarse limestone, an acidic retarder, and/or a lithium-based accelerator. The invention is directed to one or more methods of wet abrasion testing cured and wetted sand free cement-based grout compositions.

The invention is directed to one or more sand free cement-based grout compositions that are highly resistant to wet abrasion removal. The one or more sand free cement-based grout compositions comprising calcium aluminate cement as a main binder in combination with one or more additional binders as well as one or more of the following ingredients: a single anhydrite binder, metakaolin, fine limestone, coarse limestone, an acidic retarder, and/or a lithium-based accelerator. The invention is directed to one or more methods of wet abrasion testing cured and wetted sand free cement-based grout compositions.