The present invention relates to a composition comprising () at least one inorganic binder and () at least one water-soluble copolymer based on (a) 0.1 to 20 wt % of at least one monomer of the formula (I) and (b) 25 to 99.9 wt % of at least one hydrophilic monomer (b) which is different from monomer (a), where the at least one copolymer has a molar mass average M of 1 500 000 to 30 000 000 g/mol. Furthermore, a process for producing this composition is disclosed. A further aspect of the present invention is the use of the copolymer of component () as rheological additive in a composition of the invention.

A Mortar Delivery System is described. The Mortar Delivery System provides precise control of the delivery and application of mortar in addition to the mixing and tempering of mortar. Such control eliminates the use of a hand trowel in brick, block and stone laying applications. Sensing and control are integrated with the Mortar Delivery System to make it an important element of a robotic brick laying system. The Mortar Delivery System contains sensors to measure mortar viscosity and workability, mortar flow rate, and mortar nozzle pressure. The data from the Mortar Delivery System sensors can be used to change the rotational speed of the shear blades, change the amount of water being used for mixing or tempering, and change the delivery speed of the mortar. Such changes result in precise control of mortar that is in turn suitable for automated or semi-automated building processes.

Disclosed are masonry product feedstock compositions having natural aluminosilicate minerals, e.g., clay minerals and feldspars, to activate a geopolymer reaction. During the formation and curing of a masonry product, an alkali activator creates structural bonds within a mix of aggregates in the feedstock having a low moisture content (e.g., 5-10% by weight). The feedstock and manufacturing can require less energy, and can result in a lower environmental footprint than conventional masonry products. Associated processes and systems provide improved mixing and/or de-agglomeration of the feedstock, high compression during the formation of masonry products, and optimized curing. Exemplary products can include structural masonry units, veneer facing blocks, pavers, and other pre-cast products. Because the natural aluminosilicate minerals can be found in minimally processed abundant raw earth, the composition is not limited to conventional geopolymer materials that are sourced from industrial byproducts that are limited in geographic availability.

The present invention relates to an improved drywall finish and joint compound comprised of a mixture of fractured aluminum oxide, glass bead, calcium sulfate, calcium carbonate, magnesium aluminum phyllosilicate, aluminum silicate hydroxide, polyvinyl acetate, polyvinyl alcohol, metamorphic mineral, sodium bicarbonate, silicon and aluminides, talc, kaolin, and metal oxide. The improved drywall finish and joint compound is capable of adhering to drywall, wood, concrete, brick, stone, steel, and other surfaces, and can be applied using a conventional trowel or similar device, cures quickly, and eliminates the need for taping and bedding. The compound saves extensive time and labor when installing, repairing, or working with drywall.

A binder composition for enhanced mortars and coatings, comprising a first conventional mineral component and a second component based on powdery slaked lime, wherein said second component based on powdery slaked lime has a specific surface area calculated according to the BET method of less than 12 m.sup.2/g, advantageously less than 11 m.sup.2/g, in particular less than 10 m.sup.2/g, preferably less than 9 m.sup.2/g and its uses as well as the enhanced coating or mortar systems comprising an aggregate of the mineral type and the aforesaid composition.

A method for the manufacture of a high alumina hydraulic binder comprising hydrating a source of aluminium ions with a source of calcium ions in the presence of water to form mineral hydrates and subsequently heating said mineral hydrates to form said high alumina hydraulic binder.

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.

Multi-component compositions for the preparation of extrudable mortars, which include a mortar base component including Portland cement, an additive for hydration control, a polyhydroxy compound and water and an accelerator component, which includes an alkali metal aluminate. The multi-component compositions enable a simple processing in conventional 3D mortal extrusion printing devices, where the viscosity can be adjusted independent from the accelerator. Also included are cementitious compositions prepared from such multi-component compositions, a 3D printing process using such mixed compositions as a printing material, as well as 3D structures which have been prepared via a corresponding printing process.

A mortar composition, in particular a leveling mortar composition, including: a) 10-50 wt. % of a hydraulic binder, b) 10-25 wt. % of lightweight aggregates, c) 30-50 wt. % of further aggregates which have a particle density that is higher than the particle density of the lightweight aggregates, d) 0.5-5 wt. % of a polymer.

The invention provides cement additives comprising calcium sulfate and silica which are derived from a material comprising perovskite and silica, along with cements and cementitious products comprising the cement additives. The invention also provides methods for the making the cement additive and cements and cementitious products comprising the cement additives.