An aqueous solution of carbonic anhydrase and calcium chloride is contacted with a cementitious surface defining at least one opening or fissure in the presence of ambient carbon dioxide to thereby cause the calcium chloride and carbon dioxide to react, whereby calcium carbonate precipitate from the solution and seals the opening or fissure.

A sealant for a concrete element, having a planar carrier and an active substance applied onto the carrier, wherein the active substance is designed to be chemically reactive with water. The carrier is flexible.

A method of making a glass sheet includes treating a refractory block material comprising at least one multivalent component with a vehicle comprising at least one redox altering component or precursor. The method also includes flowing molten glass over the refractory block material, wherein the treatment of the refractory block material with the vehicle comprising at least one redox altering component or precursor reduces the amount of oxygen production resulting from interaction between the at least one multivalent component and the molten glass.

A refractory article used at high temperature contains a silica, calcium silicate or mullite matrix with at least a surface having an open porosity filled at least partially with a sulfate, phosphate, or carbonate salt or a mixture of sulfate, phosphate or carbonate salts. The refractory article is resistant to the corrosion and build-up of non-ferrous metals and their alloys.

A refractory article used at high temperature contains a silica, calcium silicate or mullite matrix with at least a surface having an open porosity filled at least partially with a sulfate, phosphate, or carbonate salt or a mixture of sulfate, phosphate or carbonate salts. The refractory article is resistant to the corrosion and build-up of non-ferrous metals and their alloys.

A glaze resistant to wax block bonding, a ceramic resistant to wax block bonding and a preparation process thereof are disclosed. The components of the disclosed glaze are made up of potassium feldspar, lithium feldspar, calcium carbonate, talc, kaolin, wollastonite, quartz, alumina and nanopowder, the components being in the following parts by weight: potassium feldspar 30, lithium feldspar 8, calcium carbonate 10, talc 6, kaolin 10, wollastonite 10, quartz 26, alumina 1 and nanopowder 20. Sources of the starting materials required are abundant, the price is low, the production cost is low, and a glaze surface layer resistant to wax block bonding is formed on the surface of the ceramic resistant to wax block bonding produced, thereby effectively solving the problem of the difficulty of removal of molten wax from the burning of candles which has dripped down and hardened on the surface of ceramic.

A glaze resistant to wax block bonding, a ceramic resistant to wax block bonding and a preparation process thereof are disclosed. The components of the disclosed glaze are made up of potassium feldspar, lithium feldspar, calcium carbonate, talc, kaolin, wollastonite, quartz, alumina and nanopowder, the components being in the following parts by weight: potassium feldspar 30, lithium feldspar 8, calcium carbonate 10, talc 6, kaolin 10, wollastonite 10, quartz 26, alumina 1 and nanopowder 20. Sources of the starting materials required are abundant, the price is low, the production cost is low, and a glaze surface layer resistant to wax block bonding is formed on the surface of the ceramic resistant to wax block bonding produced, thereby effectively solving the problem of the difficulty of removal of molten wax from the burning of candles which has dripped down and hardened on the surface of ceramic.

A catalytic refractory heating appliance includes a body formed from a silicon carbide refractory material having a porosity that permits ionic oxygen to pass through the refractory material. The body defines a gas flow channel. A catalyst coating is on a surface of the refractory material of the body, whereby the refractory material becomes an active component with catalytic capability. For example, when the catalytic refractory heating appliance is a fire tube carbon dioxide and sulfur compounds can be directly absorbed, or carbon monoxide is reduced to methane.

A catalytic refractory heating appliance includes a body formed from a silicon carbide refractory material having a porosity that permits ionic oxygen to pass through the refractory material. The body defines a gas flow channel. A catalyst coating is on a surface of the refractory material of the body, whereby the refractory material becomes an active component with catalytic capability. For example, when the catalytic refractory heating appliance is a fire tube carbon dioxide and sulfur compounds can be directly absorbed, or carbon monoxide is reduced to methane.

A stabilized mixture containing an alkyltrialkoxysilane hydrolysate solution and an amine functional silicone emulsion is provided. The stabilized mixture may be utilized in a masonry treatment product or a cellulosic or wood treatment product, such as to provide waterproofing properties, or in a hair care treatment product for improving hair combability. A method of preparing the mixture involves hydrolyzing an alkoxysilane to form an aqueous solution containing alkylsilanetriols and/or oligomeric alkylsilanetriol condensates; and stabilizing the solution by adding an amine functional silicone.