The invention relates to a refractory dry vibratable mix which sets at room temperature when water is added, for use in metallurgical vessels and comprising a refractory main component, a binder and a retarder.

The invention relates to a refractory dry vibratable mix which sets at room temperature when water is added, for use in metallurgical vessels and comprising a refractory main component, a binder and a retarder.

A method of diffusing CO.sub.2 within a concrete mixture that includes mixing a non-recycled aggregate material with a CO.sub.2 gas in a pretreatment chamber of a concrete preparation system to form a CO.sub.2 adsorbed aggregate material, transferring the CO.sub.2 adsorbed aggregate material from the pretreatment chamber into a cement mixing chamber of the concrete preparation system, and mixing the CO.sub.2 adsorbed aggregate material with cement and water to form the concrete mixture, where mixing the CO.sub.2 adsorbed aggregate material with cement and water releases CO.sub.2 from the CO.sub.2 adsorbed aggregate material and diffuses CO.sub.2 into the concrete mixture to form a carbonated concrete mixture.

A method of determining slurry mixability may include: providing a dry blend comprising one or more particulate materials; calculating a minimum water requirement of the dry blend; calculating a water requirement of a slurry having a target slurry density and comprising the dry blend; determining if the slurry is mixable based on the water requirement of the slurry and the minimum water requirement; and preparing the slurry if the slurry is mixable.

A method of determining slurry mixability may include: providing a dry blend comprising one or more particulate materials; calculating a minimum water requirement of the dry blend; calculating a water requirement of a slurry having a target slurry density and comprising the dry blend; determining if the slurry is mixable based on the water requirement of the slurry and the minimum water requirement; and preparing the slurry if the slurry is mixable.

An investment powder which is safer than conventional powders comprising tricalcium phosphate, and being substantially or entirely free of free silica in the respiratory portion yet providing an overall expansion at 750° C. of 1% or higher sufficient to prevent mould cracking during casting. A method of making a casting comprising forming a slurry by mixing a gypsum bonded investment powder with water, pouring the slurry into a stainless steel flask around a low melting point material model, allowing the slurry to set to define a mould, heating the mould to burn out the model and casting material into the mould wherein the stainless steel flask consists of a 400 series martensitic stainless steel.

An investment powder which is safer than conventional powders comprising tricalcium phosphate, and being substantially or entirely free of free silica in the respiratory portion yet providing an overall expansion at 750° C. of 1% or higher sufficient to prevent mould cracking during casting. A method of making a casting comprising forming a slurry by mixing a gypsum bonded investment powder with water, pouring the slurry into a stainless steel flask around a low melting point material model, allowing the slurry to set to define a mould, heating the mould to burn out the model and casting material into the mould wherein the stainless steel flask consists of a 400 series martensitic stainless steel.

A mortar composition, in particular a leveling mortar composition, including: a) 3-45 wt. % of a hydraulic binder, b) 15-80 wt. % of lightweight aggregates, c) 5-50 wt. % of a polymer.

A mortar composition, in particular a leveling mortar composition, including: a) 3-45 wt. % of a hydraulic binder, b) 15-80 wt. % of lightweight aggregates, c) 5-50 wt. % of a polymer.

A dry mineral binder composition includes cement and mineral fillers for the manufacture of molded parts by way of 3D printing. The binder composition additionally contains at least one aluminum sulfate-based accelerator, at least one polycarboxylate ether-based super-plasticizer and at least one rheology additive.