Abstract: A method for the kinetic regulation of cementitious binders and/or cementitious binder compositions, the method including the steps of providing a cementitious binder, admixing at least one borate mineral to said cementitious binder, and optionally admixing an activator selected from the group consisting of CaO, Ca(OH)2, and/or CaSO4.

Abstract: A process for the production of backfilling pastes for underground operations, the process including or essentially consisting of the mixing of a) cement, b) tailings from underground operations, c) optionally extra water, d) at least one polycarboxylate ether, and e) calcium hydroxide; and a method for controlling the flow of a backfilling paste for underground operations, the method including at least one step of admixing an admixture including at least one polycarboxylate ether and calcium hydroxide to a mixture of cement, tailings, and water.

Abstract: A method for characterizing sands with regard to adsorption of plasticizing additives includes: providing an aqueous mixture of the plasticizing additive with a defined concentration of the plasticizing additive; determination of a characteristic of the aqueous mixture whereby the characteristic is related to the proportion of the plasticizing additive in the aqueous mixture; contacting a sample of sand to be analyzed with the aqueous mixture or a sample thereof, so that the sand sample is completely immersed in the aqueous mixture or the sample thereof; taking a sample of supernatant liquid from the mixture of step; determination of the same characteristic as in step b) of the sample of supernatant liquid; and comparing the characteristic obtained in step b) with the characteristic of step e) in order to decide whether the characteristics differ from each other by more than a predefined threshold or not.

Abstract: An aqueous suspension including 5 to 65 wt. % of calcium hydroxide, wherein at least 50 wt. % of the calcium hydroxide is present in the form of nanoparticles, and at least one compound for stabilizing the suspension. The aqueous suspension accelerates the setting of mineral binder compositions without adversely affecting the processing properties of the composition.

Abstract: A method for increasing the workability of a binder composition including calcined clay, limestone, and Portland cement. The method includes a step of adding an admixture comprising at least one PCE and at least one additive selected from the group including sugar acids, sugars, sugar alcohols, and hydroxycarboxylic acids. The invention also relates to an admixture to be used in said method and hardenable compositions, especially concrete and mortar, obtainable by the method.

Abstract: Methods of obtaining aggregates and/or pulverulent mineral material from a starting material comprising hardened mineral binder and aggregates utilizing process auxiliaries selected from the group consisting of polycarboxylate ethers and/or esters (PCE), glycols, organic amines, especially alkanolamines, ammonium salts of organic amines with carboxylic acids, surfactants, especially nonionic surfactants, gemini surfactants, calcium stearate, alkoxylated phosphonic or phosphoric esters, propane-1,3-diol, carboxylic acids, sulfonated amino alcohols, boric acid, salts of boric acid, borax, salts of phosphoric acid, gluconate, iron sulfate, tin sulfate, antimony salts, alkali metal salts, alkaline earth metal salts, lignosulfonates, glycerol, melamine, melamine sulfonates, water absorbents in the form of a superabsorbent polymer or in the form of a sheet silicate, anticaking agents, sugars, sugar acids, sugar alcohols, phosphates, phosphonates, and mixtures thereof.

Abstract: A method for the kinetic regulation of cementitious binders and/or cementitious binder compositions, the method including the steps of providing a cementitious binder, admixing at least one borate mineral to said cementitious binder, and optionally admixing an activator selected from the group consisting of CaO, Ca(OH)2, and/or CaSO4.

Abstract: A combination of retarders and regulators for hydration reaction of cementitious binders including clinkers based on Ye'elimite. Set retarders are calcium complexing agents, consisting of sugar acids, sugars, sugar alcohols, hydroxycarboxylic acids, phosphates, phosphonates, borates and amines. Regulator general formula (I) is where M is H, NH4 or chosen from monovalent or divalent metal of groups Ia, IIa, IIIa, Ib, IIb, IVb, VIb, VIIb or VIIIb of periodic table of elements, where M is a divalent metal, a second equivalent of R—SO3 is present, and M is chosen from group consisting of H, NH4, Li, Na, K, MgX, CaX, or NiX with X?RSO3, and R is chosen from H, NH2, OH or from hydrocarbon chain with 1-18 C atoms which may be substituted by N and/or O and/or which may be linear or branched and/or which contain one or more unsaturated bonds and/or cycloaliphatic and/or aromatic moieties.

Abstract: An aqueous suspension including 5 to 65 wt. % of calcium hydroxide, wherein at least 50 wt. % of the calcium hydroxide is present in the form of nanoparticles, and at least one compound for stabilizing the suspension. The aqueous suspension accelerates the setting of mineral binder compositions without adversely affecting the processing properties of the composition.