The present invention relates to a dry mortar and a mortar slurry as well as a method for producing semi-rigid coatings. In one embodiment, the dry mortar or the mortar slurry contains a cement, a very fine component and a plasticizer and is free from silica fume, wherein the mortar slurry can be applied at a temperature of the asphalt support structure of 55 to 80 C. and a compressive strength of at least 100 N/mm.sup.2 is achieved after 28 days. In a further embodiment, the dry mortar or the mortar slurry also contains a gelling agent such that the mortar slurry has a reduced efflux tendency.

The use of a clay including: less than 25% of kaolinite; and at least 20% of muscovite and/or illite; the muscovite and/or illite/kaolinite weight ratio being greater than 1, for the preparation of a pozzolanic material.

A ready-mix concrete or mortar, or precast concrete composition has at least one aggregate (A), a binder composition (B), at least one alkali sulfate activator (C), water (D) and at least one water reducing polymer (E). The binder composition includes ground blast furnace slag and one or more optional components being at least one hydraulic binder other than slag, one or more supplementary cementitious materials, and one or more filler materials. The water reducing polymer (E) is a copolymer comprising the following monomeric units, a monomeric unit A between 0 and 40, a monomeric unit B between 25 and 95, a monomeric unit C between 5 and 50, and a monomeric unit D between 0 and 25, the values being in mol %. The ready-mix concrete or mortar, or precast concrete composition is classified in one of the classes S3, S4 and S5 according to standard NF EN 206.

A ready-mix concrete or mortar, or precast concrete composition has at least one aggregate (A), a binder composition (B), at least one alkali sulfate activator (C), water (D) and at least one water reducing polymer (E). The binder composition includes ground blast furnace slag and one or more optional components being at least one hydraulic binder other than slag, one or more supplementary cementitious materials, and one or more filler materials. The water reducing polymer (E) is a copolymer comprising the following monomeric units, a monomeric unit A between 0 and 40, a monomeric unit B between 25 and 95, a monomeric unit C between 5 and 50, and a monomeric unit D between 0 and 25, the values being in mol %. The ready-mix concrete or mortar, or precast concrete composition is classified in one of the classes S3, S4 and S5 according to standard NF EN 206.

The invention relates to a pozzolan mixture comprising between 5 and 80% of magnesium-iron solid solution silicates; between 5 and 80% of MgCOs X H20 where X=0-10; and between 2 and 30% of reactive silica; and having a free water content of at most 10% by total weight of mixture. The invention further relates to a method of making a cement slurry with a pozzolan mixture including the steps of: (i) reacting a magnesium-iron solid solution silicate with an acid and adding any extra magnesium-iron solid solution silicate to the products of the reaction to produce a pozzolan mixture comprising between 5 and 80% of magnesium-iron solid solution silicates: between 5 and 80% of MgCOs X H20, where X=0-10; between 2 and 30% of reactive silica: (ii) adding the products of step (i) to a slurry of cementitious material and water in a ratio of between 1:1.5 and 10:1 of cementitious material to the pozzolan mixture.

The invention relates to a pozzolan mixture comprising between 5 and 80% of magnesium-iron solid solution silicates; between 5 and 80% of MgCOs X H20 where X=0-10; and between 2 and 30% of reactive silica; and having a free water content of at most 10% by total weight of mixture. The invention further relates to a method of making a cement slurry with a pozzolan mixture including the steps of: (i) reacting a magnesium-iron solid solution silicate with an acid and adding any extra magnesium-iron solid solution silicate to the products of the reaction to produce a pozzolan mixture comprising between 5 and 80% of magnesium-iron solid solution silicates: between 5 and 80% of MgCOs X H20, where X=0-10; between 2 and 30% of reactive silica: (ii) adding the products of step (i) to a slurry of cementitious material and water in a ratio of between 1:1.5 and 10:1 of cementitious material to the pozzolan mixture.

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%.

A hybrid additive for use in construction materials such as asphalt and concrete is disclosed. The additive includes pellets formed of a plastic or polymer material, and one or more of fibers, pozzolans, nano-carbon tubes, glass, recycled asphalt shingles (RAS), liquid anti-strip, hydrated lime, rejuvenators, cementitious material, and ground tire rubber. Also disclosed are hybrid composite materials useful as paving and building materials, and methods of making the same. The hybrid additives were found to maintain the positive performance aspects of typical asphalt and concrete mixtures, while improving the performance of the mixtures by increasing bonding and strength within the mixtureand therefore increasing useable life and lowering costs.

A hybrid additive for use in construction materials such as asphalt and concrete is disclosed. The additive includes pellets formed of a plastic or polymer material, and one or more of fibers, pozzolans, nano-carbon tubes, glass, recycled asphalt shingles (RAS), liquid anti-strip, hydrated lime, rejuvenators, cementitious material, and ground tire rubber. Also disclosed are hybrid composite materials useful as paving and building materials, and methods of making the same. The hybrid additives were found to maintain the positive performance aspects of typical asphalt and concrete mixtures, while improving the performance of the mixtures by increasing bonding and strength within the mixtureand therefore increasing useable life and lowering costs.

The present invention is directed to a pozzolanic mixture used as a supplementary cementitious material (SCM) comprising an activated clay, a limestone and a setting regulator. Moreover, it is also directed to a cementitious composition comprising said pozzolanic mixture, a clinker and a setting regulator. Finally, the invention is also directed to a concrete comprising the cementitious composition described above, fine aggregate, coarse aggregate and water, optionally the concrete may have other additives.