41results about How to "Play a role in reducing water" patented technology

The invention provides a ginkgolic acid grafted and modified polycarboxylate water-reducer and a preparation method thereof. The polycarboxylate water-reducer is a random copolymer prepared by polymerizing ginkgolic acid, unsaturated polyether, unsaturated carboxylic acid or salt thereof. The preparation method comprises the following steps: dissolving ginkgolic acid and unsaturated polyether into water; heating the solution to reach the temperature of 20-80 DEG C; then correspondingly dropwise adding the aqueous solution of unsaturated carboxylic acid and the aqueous solution of an initiator and a chain transfer agent for 2-2.5 hours and 3-3.5 hours; continuously reacting for 1 hour under the temperature of 20-80 DEG C after dropwise adding; cooling; neutralizing the system with liquid caustic soda until the pH is 6-7, so as to obtain the ginkgolic acid grafted and modified polycarboxylate superplasticizer. According to the preparation method, unsaturated ginkgolic acid is extracted from waste ginkgo biloba exocarp; carboxyl, hydroxyl and side chain of ginkgolic acid are introduced into a water-reducer molecular structure, therefore, the wastes are treated into treasure on the premise that the performance of the water-reducer is maintained, and as a result, the environment is protected, and the cost of the polycarboxylate water-reducer is decreased.

The invention relates to a calcium magnesium RH dip pipe hot spray repair material used for high-performance smelting silicon steel and a preparation method, and is characterized in that the invention adopts high-purity magnesium gravel and synthesis magnesium calcium as main components; more than one of organic addition agents of woodiness calcium sulphonate, modified starch ether, and the like are used in composite mode to substitute low-melting harmful plasticizers of soft clay, water glass, and the like used by conventional spray repair material to realize good spray repair adhesiveness and good high-temperature performance of the spray repair material. The invention uses two ultra fine powder of ultra fine MgO micro powder, SiO2 micro powder and calcium hydroxide micro powder in composite mode to act slushing enhancement effect, further improves adhesiveness and agglutinating property of the material, and enhances high temperature strength of the material. Provided spray repair material has high hot strength, good high-residue erosion resistance performance and good molten steel erosion resistance performance; spraying and repairing a dip pipe can make the service life be more than one furnace when a RH device smelts low sulphur special silicon steel, thus satisfying the requirements of the smelting of the special silicon steel.

The invention discloses a high-strength concrete, which comprises the following components in parts by weight: 80-100 parts of cement, 60-80 parts of coarse aggregate, 70-80 parts of fine aggregate, calixyrrole modified nano 5-8 parts of boron fiber, 1-3 parts of bromosuccinic acid ionized modified 2,5-bis(diethylamino)phenyl-1,3,4-oxadiazole, hyperbranched poly( Amine-ester) 0.5-1 part of acrylic acid, 5-8 parts of zeolite powder, 2-4 parts of boron carbide ceramic powder, 10-15 parts of attapulgite, 1-2 parts of carboxyl-terminated liquid nitrile rubber, 40-60 parts of water . The invention also discloses a preparation process of the high-strength concrete. The high-strength concrete disclosed by the invention has high flexural and compressive strength, sufficient toughness and long service life through the cooperation and mutual action of various components.

The invention discloses a superhigh temperature anti-skinning castable. The castable comprises the following raw materials in parts by weight: 25-40 parts of corundum or alumina whose particle size is 5-1mm, 10-20 parts of silicon carbide whose particle size is 5-1mm, 5-15 parts of corundum or alumina whose particle size is 1-0.088mm, 10-26 parts of corundum whose particle size is less than 0.088mm, 2-8 parts of aluminum oxide micro powder, 2-6 parts of silica fume, 1-6 parts of aluminate cement, 0.1-0.3 parts of a decondensation agent, 0.005-0.05 parts of a retarder, 1-6 parts of silica sol, and 1-6 parts of water. The superhigh temperature anti-skinning castable has the advantages of good shaping performance and solidification performance, and after solidification, the castable has good high temperature resistance, erosion resistance, and thermal shock resistance.

Belonging to the technical field of environmental protection building materials, the invention in particular relates to a cement concrete water reducing agent suitable for machine-made sand. According to a technical scheme, the cement concrete water reducing agent suitable for machine-made sand is composed of the following components by weight: 8-60 parts of carboxylated styrene butadiene rubber powder, 5-20 parts of potassium aliphatate soap, 10-30 parts of starch, and 10-40 parts of a sodium hydroxide solution. The water reducing agent provided by the invention has very good volume compatibility with machine-made sand, can effectively ensure dispersion of the water reducing agent in concrete, has high water reducing rate and good fluidity, and can obviously improve the fluidity and workability of cement concrete for machine-made sand.

The invention discloses a concrete glue reducer and a preparation method thereof, and relates to the technical field of concrete admixtures. The main point of the technical solution is a concrete glue reducer, which is prepared by diluting a mother liquor with water, and calculated as 100 parts by weight of the mother liquor. It includes the following components: 45-55 parts of mixed alcohol amine, 4-6 parts of anhydrous sodium metasilicate, 5-7 parts of lithium silicate, 15-20 parts of sodium methyl silicate, and the balance is water. The concrete glue reducer of the invention has the advantages of reducing the amount of cement used, improving the fluidity of the concrete mixture and the encapsulation of the aggregate by the cement, thereby improving the workability of the concrete.