36results about How to "Solve bleeding" patented technology

The invention relates to a multicolor light-previous keycap and a manufacturing method of the multicolor light-previous keycap. The manufactured multicolor light-previous keycap is provided with a plurality of symbol display regions, characters are arranged in all the symbol display regions, and each symbol display region is only covered with a single light-previous color layer. Thus, when a backlight source below the keycap emits light, light form the light source will only penetrate through the single light-previous color layer covering one symbol display region and will not penetrate through the other light-previous color layers covering the other symbol display regions, and in this way, the problem of color bleeding caused due to the fact that each symbol display region is covered with multiple light-previous color layers in the prior art can be solved.

The present invention discloses an adhesion promoter of a cement-based material and the preparing method and the use thereof, the invention is the adhesion promoter of the cement-based material which is obtained using the papermaking waste liquor, extracting the methyphenylpropane of the phenol-containing hydroxyl group, generating esterifying reaction with the carboxyl monomer under the functionof the catalyst and then copolymerizing with the carboxyl acid, or graft-copolymerizing with the acidamide substance and ahs a comb-shaped structure. When the adhesion promoter is mixed into the cement-based material the appropriate thickness and workability can be endowed to the cement-based material, the mixed water is leaded to be uniformly distributed in the cement-based material and can be kept stable for a long time without discharging out, at the same time the adhesion promoter of the invention increases the viscosity of the paste and leads to that the particles of aggregate is not easily moved thereby effectively preventing the disengagement and facilitating that the cement-based material always keeps better homogeneity.

The invention relates to the technical field of building materials, in particular to a bleeding-reducing concrete admixture and a preparation method thereof, wherein the preparation method includes the following preparation steps: adding quicklime to the original ready-mixed concrete waste slurry to perform pressure filtration treatment to obtain a pre-mixed concrete admixture. Mixing waste concrete slurry press filter residue; adding the ready-mix waste concrete slurry filter residue and grinding aid into a ball mill for ball milling to obtain ready-mix waste concrete slurry powder; mixing the ready-mix waste concrete slurry powder and pulverized coal The ash is mixed and stirred to prepare the bleeding-reducing concrete admixture. The invention uses the waste cement slurry produced by the ready-mixed concrete in the concrete mixing plant, and uses it as a raw material to prepare an admixture with reduced bleeding performance, which reduces the amount of other admixtures such as silica fume and mineral powder, and reduces the cost of concrete ; At the same time, high-value reuse of waste slurry from mixing plants has good economic and environmental effects, and is in line with the concept of sustainable development.

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 discloses wet-mixed plastering mortar prepared from stone chips and tailing sand. The wet-mixed plastering mortar comprises the following components in parts by weight: 18-22 parts of cement, 6-8 parts of coal ash, 5-7 parts of mineral powder, 22-25 parts of water, 100-125 parts of the stone chips, 20-35 parts of the tailing sand and 0.5-1.5 parts of a mortar additive, wherein the particle sizes of the stone chips are not greater than 4.75 mm and the stone chips comprise 2-3% of stone powder; the particle size of the tailing sand is not greater than 2.36 mm and the tailing sand comprises 5-10% of mud; the mortar additive is a thickener and comprises the following components in parts by weight: 2-4 parts of a sulfonic acid air entraining agent, 20-40 parts of a naphthalene water reducer, 2-6 parts of sodium gluconate, 0.5-2 parts of polypropylene staple fibers, 5-10 parts of latex powder and 20-40 parts of sodium bentonite. The stone chips and the tailing sand are adopted for replacing machine-made sand and river sand, so that the environmental pollution caused by waste stone chips and tailing sand is alleviated and the production cost of the mortar is reduced.

The invention discloses a LC30 light-weight high-strength pumping ceramsite concrete, which consists of the following components in parts by mass: 340-360 parts of cement, 120-130 parts of fly ash, 274-329 parts of ceramsite and 340 parts of ceramsite ~360 parts, 90~100 parts of natural medium sand, 90~100 parts of machine-made medium sand, 70~80 parts of natural fine sand, 8~9 parts of water reducer, 180~200 parts of mixing water, 15~25 parts of additional water parts, 0.096-0.106 parts of water-soluble organic tackifier; the invention also discloses a method for preparing LC30 light-weight high-strength pumping ceramsite concrete. The ceramsite concrete of the present invention saves the saturated pre-wetting process of ceramsite by rationally designing the mixing ratio, avoids layered segregation, and realizes the effect of light weight and high strength of lightweight aggregate concrete, making it suitable for pumping; the present invention The preparation method improves the production efficiency and reduces the preparation cost.

The present invention is in the field of coloring of surimi seafood products. It relates to a coloring formulation comprising carmine. The invention also provides a process for producing the formulation.

The invention relates to the technical field of mixing piles, and discloses a reducing mixing pile machine. The reducing mixing pile machine comprises a machine base, a tower, a mixing head and a lifting mechanism. The tower is fixed to the machine base. The mixing head is hoisted on the tower through the lifting mechanism. The mixing head comprises a drill pipe, a rotation driving mechanism and a telescopic mechanism. The drill pipe comprises an outer pipe and an inner pipe, and the inner pipe is sleeved with the outer pipe. A grout spraying nozzle is arranged on the front portion of the inner pipe. The rotation driving mechanism is connected with the outer pipe and the inner pipe. The telescopic mechanism drives the inner pipe and the outer pipe to relatively move. The outer pipe is provided with an outer pipe radial ring, and an inner pipe radial ring is arranged on the front portion of the inner pipe. A slidable transition sleeve is further arranged on the front portion of the inner pipe and provided with an upper radial ring and a lower radial ring, and the upper radial ring and the lower radial ring can rotate relatively. At least one mixing blade set is hinged between the outer pipe radial ring and the upper radial ring, and at least one mixing blade set is hinged between the inner pipe radial ring and the lower radial ring. Each mixing blade set comprises at least one mixing blade. Each mixing blade comprises a first blade body and a second blade body hinged to the first blade body. The invention further provides a pile forming construction method and the drill pipe.

A pile forming operation method for bidirectional stirring piles is a ground foundation processing method and is adapted for soft ground foundation treatment. The operation method is that: a: leveling ground; b: the position of a bidirectional stirring pile machine: a hoisting machine suspends the stirring pile machine to a defined pile position and moves it to the center; c: stirring sinkage: starting the bidirectional stirring pile machine to make the drill rod cut soil from up to down along a guide frame, starting a slurry feeding pump to inject cement slurry to the ground, the vanes that rotate in normal and reverse directions on the drill rod of the bidirectional stirring pile machine are rotating together to stir the cement soil; d: the drill rod of the bidirectional stirring pile machine will continue moving down and stirring cement soil till to a designed depth; e: the vanes that rotate in normal and reverse directions on the drill rod of the bidirectional stirring pile machine will continue stirring the cement soil while stirring and hoisting ; f: hoisting and stirring to ground surface or designed elevation more than 50 cm to complete the construction of the bidirectional stirring cement soil stirring pile (1). The cement soil stirring piles (1) are disposed in the form of quincunx or square shape in order to ensure the pile quality and pile body quality.