It discloses cement grinding aids prepared with waste antifreeze which comprises the following components in parts by weight: 20-75 parts of pretreated waste antifreeze, 5-40 parts of alkanolamine, 1-5 parts of acid solution, 3-12 parts of saccharide and 15-50 parts of water. The pretreated waste antifreeze is prepared by adding an alkaline solution into waste antifreeze to regulate the pH value, adding a flocculant, and stirring and standing; separating upper-layer oil, and then filtering to remove flocculent precipitates, thus obtaining a clear mixed solution.

The present invention provides aqueous compositions that are stable after at least a 24 hour period comprising a polysaccharide viscosity modifying additive and more than 60 wt. %, based on the weight of total solids in the compositions of one or more polycarboxylate ether, the compositions comprising an acid chosen from an organic acid having 1 hydroxy group or less, a strong acid containing a single hydrogen, an ascorbic acid, and mixtures thereof, the compositions having a pH of less than the pH of the polycarboxylate ether itself, or from 1.0 to 6.0. The present invention enables stable concentrates of aqueous polycarboxylate ethers and polysaccharide viscosity modifying agents for use in hydraulic binder applications, the compositions having a total solids content of 10 wt. % to as high as 65 wt. %.

The present invention provides aqueous compositions that are stable after at least a 24 hour period comprising a polysaccharide viscosity modifying additive and more than 60 wt. %, based on the weight of total solids in the compositions of one or more polycarboxylate ether, the compositions comprising an acid chosen from an organic acid having 1 hydroxy group or less, a strong acid containing a single hydrogen, an ascorbic acid, and mixtures thereof, the compositions having a pH of less than the pH of the polycarboxylate ether itself, or from 1.0 to 6.0. The present invention enables stable concentrates of aqueous polycarboxylate ethers and polysaccharide viscosity modifying agents for use in hydraulic binder applications, the compositions having a total solids content of 10 wt. % to as high as 65 wt. %.

A binder composition including: (a) between 10% and 49% in dry weight of Portland cement, lime or a mixture thereof; (b) between 10% and 49% in dry weight of at least one pozzolanic material; (c) between 21% and 80% in dry weight of at least one filler; (d) between 0.1% and 10% in dry weight, relative to the total weight of components (a), (b) and (c), of at least one activator; (e) between 0.05% and 1.5% in dry weight, relative to the total weight of components (a), (b) and (c), of at least one rheology enhancing admixture. The filler is a particles mixture of: between 10% and 100% in weight, in respect with the total weight of the filler, of particles having a d50 greater than or equal to 0.05 m and strictly less than 8 m, and between 0% and 90% in weight, in respect with the total weight of the filler, of particles having a d50 greater than or equal to 8 m and less than 200 m.

A binder composition including: (a) between 10% and 49% in dry weight of Portland cement, lime or a mixture thereof; (b) between 10% and 49% in dry weight of at least one pozzolanic material; (c) between 21% and 80% in dry weight of at least one filler; (d) between 0.1% and 10% in dry weight, relative to the total weight of components (a), (b) and (c), of at least one activator; (e) between 0.05% and 1.5% in dry weight, relative to the total weight of components (a), (b) and (c), of at least one rheology enhancing admixture. The filler is a particles mixture of: between 10% and 100% in weight, in respect with the total weight of the filler, of particles having a d50 greater than or equal to 0.05 m and strictly less than 8 m, and between 0% and 90% in weight, in respect with the total weight of the filler, of particles having a d50 greater than or equal to 8 m and less than 200 m.

Provided are an active and passive integrated fireproof heat-insulating board and a preparation method thereof, including: n passive fireproof layers and n or n+1 active fireproof layers, the passive fireproof layers and the active fireproof layers are overlapped with each other into a whole. Each passive fireproof layer includes an inorganic fiber felt and an aerogel; the aerogel is obtained by curing an aerogel stock solution having adhesiveness, and the aerogel stock solution includes, in parts by mass, 1000 to 4000 parts of silica sol, 50 to 150 parts of soluble silicate, 10 to 50 parts of a phosphate adhesive, 5 to 20 parts of quicklime, 5 to 50 parts of titanium dioxide, 10 to 50 parts of calcium stearate, 5 to 50 parts of a hydrophobic modifier, 5 to 50 parts of an acid-base regulator, and 1000 to 4000 parts of a solvent.