A kit for preparing a set activator blend and a method for controlling a setting reaction with the set activator blend of a setting joint compound, in particular of a ready-mixed setting joint compound, the method including: 1) blending together a first set activator including a cadmium compound, lead compound and/or zinc compound and a second set activator including a ferrous compound, aluminum compound and/or manganese compound, and thereby obtaining a set activator blend; and 2) mixing the set activator blend with the setting joint compound and thereby controlling the setting reaction of the setting joint compound.

A thickener is provided comprising an anionic polyacrylamide group containing at least two anionic polyacrylamides having different degrees of anionization, and a water-soluble cellulose ether. When added to a hydraulic composition, the thickener is effective for improving flow while maintaining rheological properties.

The invention relates to a pulverulent composition which can be produced by bringing a powder which comprises at least one inorganic binder into contact with from 0.01 to 10% by weight, based on the total mass of the composition, of a liquid component comprising at least one copolymer which can be obtained by polymerization of a mixture of monomers comprising (I) at least one ethylenically unsaturated monomer which comprises at least one radical selected from the group consisting of carboxylic acid, carboxylic acid salt, carboxylic esters, carboxamide, carboxylic anhydride and carboximide and (II) at least one ethylenically unsaturated monomer having a polyalkylene oxide radical, where the liquid component contains at least 1% by weight of the at least one copolymer and at least 30% by weight of an organic solvent. Furthermore, a process for producing the liquid component, the use thereof and also specific copolymers are disclosed.

The invention relates to a process for preparing silica-coated particles of an inorganic expanding agent, the silica-coated particles and their use. The silica-coated particles show a delayed release of the expanding agent particularly in alkaline medium and at elevated temperatures. They are therefore useful in the oil and construction industry.

The present invention relates to a mixture comprising at least one compound comprising an -hydroxy-carboxylic unit, -hydroxy-sulfonic acid unit or -carbonyl-carboxylic unit and at least one water-soluble organic carbonate. The mixture is useful as a hydration control agent in construction chemical compositions comprising an inorganic binder.

The invention relates to a pulverulent composition preparable by contacting a powder with 0.01 to 50 wt %, based on the overall mass of the composition, of a liquid component comprising at least one copolymer obtainable by polymerizing a mixture of monomers comprising (I) at least one ethylenically unsaturated monomer which comprises at least one radical from the series carboxylic acid, carboxylic salt, carboxylic ester, carboxylic amide, carboxylic anhydride, and carboxylic imide and (II) at least one ethylenically unsaturated monomer having a polyalkylene oxide radical, the liquid component comprising at least 1 wt % of the at least one copolymer and at least 30 wt % of an organic solvent, and the powder which is contacted with the liquid component comprising no inorganic binder. Further disclosed is a binder composition which comprises a pulverulent composition of the invention and an inorganic binder.

The present invention relates to a curable binder composition comprising: a) at least one organic binder comprising a polyisocyanate and a polyol, and b) at least 50% by weight of a filler in the form of quartz and/or slag, based on 100% by weight of binder composition.

A kit of parts suitable to form a waterproofing membrane consisting of a first component A including or consisting of a) 5-60 mass parts, preferably 30-60 mass parts, more preferably 45-55 mass parts, of a hydraulic binder, b) 0.5-15 mass parts, preferably 1-5 mass parts of at least one synthetic polymer, c) 20-80 mass parts, preferably 30-50 mass parts of aggregates, and d) optionally further additives and a second component B including or consisting of an aqueous emulsion of bitumen.

Mineral binder compositions with accelerated setting and/or curing including a mineral binder, at least one free-radical initiator, and at least one catalyst for the at least one free-radical initiator. The mineral binder compositions accelerated setting and hardening and are especially useful for applications at low temperatures and even below 0? C.

The invention relates to a composition for building construction comprising a paper sludge deriving from de-inked paper recycling processes, the sludge having a grain size distribution D90 in the range of 30 to 1000 m and an ingredient selected from the group consisting of modified cellulose, cement, furnace slag and mixtures thereof.