32results about How to "Increase plastic viscosity" patented technology

The invention belongs to the technical field of building materials, and in particular relates to a 3D printing white cement-based material, which comprises, in parts by weight: 640-740 parts of basic oxide, 400-470 parts of phosphate, 60-120 parts of retarder and A modifier, the modifier includes a solid component and a liquid component, and the liquid component is stored separately from the solid component in the basic oxide, phosphate, retarder and modifier, wherein: The liquid component includes: 10-30 parts of emulsion; the solid component includes: 10-25 parts of fiber, 5-25 parts of gypsum, 5-17 parts of titanium dioxide, and 10-30 parts of limestone powder. The present invention uses phosphate and alkaline oxide as the main components, and by adding components such as fibers and modifiers, the rheology and thixotropy of the 3D printing white cement-based material are greatly improved, and the printable time is realized. Stable regulation and stable control of 3D printed structures.

The invention discloses a preparation method of a thickener used for self-compact concrete. The method comprises the following steps: 1, weighing 2-acrylamide-2-methylpropanesulfonic acid and acrylic acid in proportion, processing to prepare an aqueous solution, and adjusting the pH value to 6.5-7.0; 2, adding a prepared monomer acrylamide solution with the concentration of 25-35% while stirring, uniformly stirring, dumping the obtained mixed solution into a flask, carrying out constant temperature water bath, and introducing nitrogen for protection; and 3, adding an initiator in a dropwise manner when the reaction temperature rises to 30-40DEG C, carrying out heat insulation at 40DEG C, carrying out a stirring reaction for about 1.5-2h, stopping the introduction of nitrogen when reactants are a viscous liquid, and carrying out constant temperature slaking for a period of time to obtain a white transparent colloid which is the thickener. The thickener obtained in the invention is used for preparing the self-compact concrete, has a good water solubility and a good thickening effect, can effectively improve the plastic viscosity of the self-compact concrete, and solves the water segregation and separation problems of the self-compact concrete.

The invention provides an organic-inorganic compound oil displacement agent, an organic-inorganic compound oil displacement system as well as a preparation method and application and relates to the technical field of oil displacement agents. The organic-inorganic compound oil displacement agent comprises the following raw materials in parts by mass: 5-20 parts of electronegative inorganic nano-particles and 20-100 parts of electropositive amphiphilic polymers. The technical problem that the conventional polyacrylamide has a limited application range in high-temperature high-salt reservoir development is solved. After the organic-inorganic compound oil displacement agent provided by the invention is mixed with injected oil field water to prepare the oil displacement system, by virtue of charge attraction of the electronegative inorganic nano-particles and the electropositive amphiphilic polymers, the plastic viscosity of the oil displacement system is obviously improved, and the environmental sensitivity of the oil displacement system is reduced, so that the organic-inorganic compound oil displacement agent has wide application prospects in the high-temperature high-salt reservoir development.

The invention discloses a self-compacting anti-freezing and anti-thawing concrete and a preparation method thereof. The self-compacting anti-freezing and anti-thawing concrete is composed of, by weight part, 290-360 parts of cement, 15.5-25.5 parts of additives, 130-180 parts of mineral admixture, 250-320 parts of fine aggregate, 500-700 parts of coarse aggregate, 80-120 parts of coal ash, 180-240parts of water, 8.6-12.8 parts of water reducer, 10-15 parts of adhesives and 10-20 parts of lignin fiber, wherein the additives are composed of anti-freezing agent, air entraining agent and swellingagent at a weight ratio of 1:2-3:0.7-1. The preparation method of the self-compacting anti-freezing and anti-thawing concrete comprises preparing a first mixture, preparing a second mixture and preparing a finished product. The self-compacting anti-freezing and anti-thawing concrete has the advantages of being good in peaceability, less prone to bleeding and segregation and high in anti-freezingand anti-thawing performance.