The present invention relates to a quick and low-stress setting chemical formulation for construction, containing at least one binding agent on the basis of calcium sulfate, at least an ettringite-forming agent, at least one activator, at least one filler, at least one redispersable dispersion powder and optionally additives and to the use of the chemical formulation for construction for producing thin-layered balancing masses, self running and solid fillers, screed binding agents or screed mortars, tile adhesive mortars, jointing mortars and sealing sludges.

Construction chemical formulation

The invention relates to the technical field of furniture decoration, in particular to a GRG decorative board. The GRG decorative board is formed by curing gypsum slurry, wherein the gypsum slurry comprises, by weight, 4000-5000 parts of gypsum powder, 1200-1400 parts of water, 3-4 parts of delay agents and 0.3-0.5 part of a defoaming agent. Compared with the prior art, ingredients of gypsum raw material of the GRG decorative board are reasonable, the overall performance of the prepared GRG decorative board is ensured, and the GRG decorative board has the characteristics of being small in linear variable, good in forming performance, light in weight and low in cost, and can be used for high-grade building decoration, handicraft materials and the like. The invention further provides a preparation method of the GRG decorative board.

GRG decorative board and preparation method thereof

The invention provides a composite shotcrete material for an underground coal mine and a using method of the composite shotcrete material, and belongs to the technical field of coal mine safety protection and building materials. The composite shotcrete material comprises, by weight, 1-2 parts of cement, 2-4 parts of sand, 2-4 parts of crushed stone, 0.05-5 parts of aluminum oxide, 4-8 parts of calcium carbonate, 0.07-3 parts of sodium hydroxide and 0.12-3 parts of dry powder accelerator. The using method comprises the steps of uniformly stirring the materials to obtain a mixture, placing the mixture into a bag, transporting the mixture to the working surface of an underground roadway of the mine, mixing the mixture with water to obtain slurry, and spraying the slurry to the wall surface ofthe well wall and the roof of the mine. The adhesive property of the mixture is good, condensation is rapid, the strength is increased at the later stage, rebound of the slurry can be avoided, the functions of wind prevention and water control of the well wall and support reinforcement are achieved, transportation and carrying are convenient, the labor intensity of underground personnel can be reduced, and generation of silicosis can be prevented. The slurry does not hurt the skin of the body and hands, and is green and environment-friendly mixed spray slurry.

Composite shotcrete material for underground coal mine and using method thereof

Voucher maturity marking

There is provided a gypsum composition for a drying type coating material, the gypsum composition, when made into a gypsum-based coating material by addition of water, capable of forming a coating film in which color unevenness is suppressed even though the coating film is thin and smooth. This gypsum composition for a drying type coating material contains hemihydrate gypsum having a mean particle diameter of 50 μm or less, calcium carbonate having a mean particle diameter of 50 μm or less, and a setting retarder, wherein the gypsum composition has a content of calcium carbonate of 100 to 400 parts by mass and a content of the setting retarder of 0.1 parts by mass or more each based on 100 parts by mass of the hemihydrate gypsum.

Sven Schiller

Papers

Construction chemical formulation

Chemical formulation for construction