58results about How to "Reduced hydration" patented technology

The invention discloses a gray brick mechanically manufactured from lime sludge and construction wastes and a method for manufacturing the same. The materials for mechanically manufacturing the gray brick comprise the following raw materials in portion by weight: 1,015 to 1,135 portions of construction waste crushed materials, 240 to 290 portions of cement, 810 to 1,010 portions of lime sludge, 60 to 75 portions of gray lime, and 100 to 125 portions of water, wherein the particle size of the construction waste crushed materials is less than 15 millimeters. If necessary, less than 20 portions of fly ash and proper amount of activating agent can be added to the materials. The method for mechanically manufacturing gray brick comprises the following steps: firstly, crushing the construction wastes; secondly, mixing the construction waste crushed materials with the other materials according to the proportions; and thirdly, pressing the mixture by adopting a mechanical method so as to produce the gray brick of the invention. The gray brick and the method for manufacturing the same recycle the sludge and the construction wastes in a reducing, harmless and resource-utilizing mode, and solve the problem that substituting materials and products are hard to find after clay bricks are forbidden to use and the problem of gray brick sources for civilian constructions.

The invention provides a quick-hardening waterproof ceramic tile adhesive which comprises powder and liquid. The powder is prepared from, by weight, high-alumina cement, ordinary Portland cement, gypsum, silica sand, silica fume, a water repellent, a water reducer, coal ash, a water retaining agent, an anti-sagging agent, redispersible powder, a water soluble organic compound early strength agent and an alkyl carboxyl retarder; the liquid is prepared from, by weight, an acrylic emulsion, butylbenzene emulsion, water, a defoaming agent and a corrosion remover. According to the adhesive, the powder is formed by combining the ordinary Portland cement, the high-alumina cement and the gypsum and the liquid formed by combing the acrylic emulsion and the butylbenzene emulsion are matched for use, quick-hardening and waterproof effects of the ceramic tile adhesive can be achieved, and compared with an adhesive only adopting powder, the quick-hardening waterproof ceramic tile adhesive is better in adhesion effect and waterproof effect.

The invention provides a polycarboxylate water reducer containing modified water-soluble acrylate and a preparation method thereof. The preparation method comprises the following steps: firstly, directly carrying out esterification reaction on polyhydroxy-alcohol carbohydrates and crylic acid so as to prepare modified water-soluble acrylate micromonomers; then putting polyether macromonomers into deionized water, and fully dissolving so as to prepare a reaction base solution; dissolving the acrylate micromonomers, crylic acid, an initiator vitamin C and a chain transfer agent mercaptoacetic acid into deionized water, so as to prepare drop concentrate; putting an initiator hydrogen peroxide into the reaction base solution, dropwise adding the drop concentrate into the reaction base solution at a constant speed, reacting while stirring, then regulating the pH value of the solution to be 7-8, so as to prepare the polycarboxylate water reducer. According to the preparation method, the regulating function of the polyhydroxy-alcohol carbohydrates is directly used in the water reducer, so that the property of the water reducer is optimized; the polycarboxylate water reducer prepared by the method has high water reducing rate, and the concrete is obviously improved in fluidity retainability and has less slump loss, so that the water reducer can meet higher construction requirements.

The invention discloses a method for preparing a shell primary layer coating for titanium alloy precision investment casting. The method includes the steps that electric melting yttrium oxide powder with a certain coarse and fine powder ratio is obtained through preprocessing of primary layer fireproof materials, a compound binding agent is prepared from organic acid, an inert organic solvent and acetic acid zirconium, and finally the primary layer coating is prepared. According to the method for preparing the shell primary layer coating for titanium alloy precision investment casting, the specific surface area of the yttrium oxide powder is reduced, organic acid and yttrium oxide can generate hydroxide of yttrium salt, the hydration of yttrium oxide is weakened, and the function of the high-temperature binding agent is achieved; viscosity is adjusted regularly, volatilization is reduced regularly, and stability of the coating is kept. The performance of the primary layer coating prepared through the method is stable and can be prolonged for 20 days, the temperature of the coating is 20+/-5 DEG C, and therefore preparing and preserving can be conducted in a common constant-temperature and constant-humidity environment, and the coating preparing and preserving technology control is simplified.

The invention relates to the technical field of concrete, in particular to self-retarding concrete. The self-retarding concrete is prepared from the following raw materials in parts by weight: 20-40 parts by weight of fly ash, 15-35 parts by weight of cement, 5-30 parts by weight of fine sand, 10-20 parts by weight of clay ceramsite, 5-15 parts by weight of bentonite, 6-18 parts by weight of kaolin, 4-12 parts by weight of gypsum, 2-4 parts by weight of diethylenetriamine pentamethylphosphonic acid, 3-15 parts by weight of aluminum silicate fiber, 3-12 parts by weight of unsaturated glyceryl alcohol, 1-5 parts by weight of fatty alcohol-polyoxyethylene ether, 1-5 parts by weight of polyhydric alcohol, 2-3 parts by weight of polyamine, 2-6 parts by weight of acid anhydride, and 0-5 parts byweight of an auxiliary agent. The self-retarding concrete has a setting time of 60 to 85 hours, has broad application prospects, and is low in cost and high in economic benefit.

The invention relates to the field of concrete, and particularly discloses mass concrete as well as a preparation method and application thereof. The mass concrete is prepared from the following raw materials in parts by weight: 340-355 parts of cement; 40 to 45 parts of fly ash; 100 to 110 parts of mineral powder; 680 to 720 parts of fine aggregate; 1080 to 1100 parts of coarse aggregate; 7-9 parts of a water reducing agent; and 135 to 145 parts of water. The preparation method comprises the following steps: weighing the cement, the fly ash, the mineral powder, the fine aggregate and the coarse aggregate in proportion, and uniformly mixing and stirring to obtain a first mixture; and weighing the water reducing agent and the water according to the proportion, adding the weighed water reducing agent into the water, uniformly mixing, adding the water doped with the water reducing agent into the first mixture, and uniformly stirring to obtain the mass concrete. The mass concrete has the advantages that the crack generation probability is reduced, and the crack generation amount is reduced.

The invention relates to a preparation method of high-adaptability concrete, wherein the preparation method comprises the steps: mixing 224-300 kg of cement with 100-135 kg of water, wet-grinding, adding 143-298 kg of a composite superfine admixture and 600-700 kg of a fine aggregate, and mixing to obtain cement mortar; allowing the cement mortar to enter from a slurry inlet of a screw press dehydrator, gradually dehydrating and concentrating the slurry due to the radial and axial mechanical squeezing effects, putting 1000-1100 kg of a coarse aggregate, stirring, then putting 10-20 kg of a pumping agent, 5-10 kg of a self-curing micro expansion agent and 3-6 kg of a high compatible plasticity-maintaining agent, and stirring into the high-adaptability concrete. The obtained concrete has the advantages of high plasticity maintaining, low shrinkage, low hydration heat, low cost, self compacting and self-curing performance; all the performance indicators are in line with needs of the ''technical specification for application of high strength concrete'' JGJ/T 281-2012, and the concrete is mainly used in super high-rise buildings, large marine engineering, long-span bridges, tunnels and railway, and nuclear power engineering.

The invention provides a safe static breaking agent for coal mines. The preparation method comprises: adding the heavy calcium powder and an additive to water, mixing uniformly, and firing to form anagent cake, wherein the content of the heavy calcium powder is 85-95%, and the additive is SiO2, Fe2O3 and Al2O3; and grinding the agent cake into powder, loading the powder into a cylinder, and packaging to form an agent column so as to obtain the safe static breaking agent for coal mines. According to the present invention, the safe static breaking agent, ie., the agent column, is pounded into the drilling hole after soaking for a sufficient time, the agent column can be subjected to condensing hardening swelling in the hole, and can generate pressure to the hole wall to achieve the tensilestrength of the object breaking so as to break the object; and the safe static breaking agent can be produced in advance at the factory, and then be directly used under the mine without a stirrer.

The invention discloses a concrete pumping agent capable of preventing pipe blockage and water seepage. The concrete pumping agent is characterized in being prepared from the following components in parts by weight: 4 to 7 parts of di (2-chloroethyl) hydrophosphate/piperazine-N, N-bis (2-hydroxyethane sulfonic acid) disodium salt polycondensate, 0.2 to 0.5 part of hyperbranched polyamino acid, 10to 15 parts of maleimide-tri (ethylene glycol)-propionic acid/triethanolamine oleate soap/vinyl phosphonic acid copolymer, 2 to 4 parts of kleemanite, 0.1 to 0.3 part of carboxymethyl chitosan and 30to 40 parts of water. The invention further provides a preparation method of the concrete pumping agent capable of preventing pipe blockage and water seepage. The concrete pumping agent disclosed by the invention is good in adaptability to cement, good in pumping effect, excellent in comprehensive performance, small in mixing amount, small in negative influence on the comprehensive performance ofconcrete, stable in quality and safe and environment-friendly to use, and the concrete added with the pumping agent is good in workability, excellent in pumpability and free of a water seepage phenomenon.

The invention relates to the technical field of building materials, in particular to a setting time regulator, a preparation method thereof and a ceramic tile glue. The setting time regulator is a core-shell type material and comprises an inner core and a shell layer coating the inner core, wherein the shell layer is made of a composite material of a water-soluble organic gel material and a retarder; and the inner core is made of a setting accelerator, wherein the melting point of the setting accelerator is Taccelerator, the melting point of the retarder is Tslow, and the melting point of thewater-soluble organic gel material is Tgel, the Taccelerator being greater than the Tslow, and the Taccelerator being greater than the Tgel. The setting time regulator solves the problem that the material property is not matched with the robot construction process in the construction process of paving ceramic tiles by the building robot at present, and is suitable for the robot construction rhythm.

The invention discloses exposed-aggregate concrete and a construction method thereof, and relates to the technical field of concrete construction. The exposed-aggregate concrete is prepared from the following exposed-aggregate concrete raw materials in parts by weight: 250-300 parts of cement, 1100-1200 parts of coarse aggregate, 750-850 parts of fine aggregate, 80-120 parts of mineral powder, 8-12 parts of a water reducing agent and 140-180 parts of water. Raw materials of the exposed-aggregate concrete further comprise an exposed-aggregate agent, and the exposed-aggregate agent is prepared from the following raw materials in parts by weight: 0.04 to 0.08 part of glucose, 0.025 to 0.045 part of sodium hexametaphosphate, 0.001 to 0.005 part of amantadine hydrochloride and 0.35 to 0.45 partof dissolving water. The exposed-aggregate concrete has the advantages of good retarding effect and good environmental protection performance. The construction method of the exposed-aggregate concrete comprises the following steps of exposed-aggregate agent preparation, concrete preparation, pavement pouring, pavement maintenance and the like. The construction method of the exposed-aggregate concrete has the advantage that the retarding effect of the product is conveniently improved.

The invention discloses a cement stabilized macadam mixture and a road base layer construction method used in high-temperature seasons. The mixture comprises cement, a saccharose solution, stabilizedmacadam rough aggregates and fine aggregates. Saccharose is fused in cement stabilized macadam mixed water, the cement hydration reaction can be delayed, the non-delayed-coagulation cement delayed coagulation effect is achieved, and the cement stabilized macadam mixture has sufficient construction delay time. The construction delay time can be flexibly adjusted according to the mixing amount, thesufficient construction time can be achieved for the cement stabilized macadam mixture under the situation that ordinary cement is used in the scorching summer, and accordingly the engineering qualityis ensured.

The invention relates to the technical field of concrete and preparation, and specifically relates to a preparation method of self-slow-setting concrete. The preparation method of the self-slow-setting concrete comprises the following steps: (1) modifying gypsum through roasted bentonite and kaolin and etidronic acid to obtain mineral powder; (2) uniformly mixing unsaturated glyceryl alcohol, fatty alcohol-polyoxyethylene ether, polyhydric alcohol, anhydride and polyamine; and reacting for 2-4h under the temperature of 80-120 DEG C to obtain a slow setting intermediate; and (3) uniformly dispersing the slow setting intermediate, coal ash, cement, fine sand, clay ceramsite, alumina silicate fibers, modified mineral powder and additives in water; and continuously stirring for 60-150s to obtain the self-slow-setting concrete. The self-slow-setting concrete prepared by the method is set for 60-85h, and has a good application prospect, and is low in cost and high in economic benefit.

The invention relates to the field of building materials, in particular to a fabricated concrete brick based on a machine-made sand material and a preparation method of the fabricated concrete brick. Mortise and tenon joint structures used for splicing are arranged at the two ends of the concrete brick; a plurality of inserting blocks and inserting grooves are formed in the middles of the lower surface and the upper surface of the concrete brick at intervals; a plurality of vertical through holes are formed in one side of each inserting block at intervals in a penetrating mode; an additional material insertion cavity is formed in the other side of each inserting block; flash grooves are formed around the inserting grooves; a plurality of transverse through holes are formed in the sides, close to the vertical through holes, of the two end faces of a brick body in a penetrating mode from top to bottom at intervals; and the transverse through holes communicate with the vertical through holes. On one hand, rapid connection and splicing of concrete bricks are achieved, and the concrete brick is high in positioning precision, stable and compact in connection and suitable for later expansion construction; and on the other hand, the provided preparation method guarantees the strength of the brick body, and the concrete brick is light in weight, high in compressive strength, good in bearing capacity and easy to install and operate, and has the practical effect in a practical sense.

The invention relates to the technical field of building admixtures, in particular to a concrete water reducing agent and a preparation method thereof. The concrete water reducing agent comprises a photopolymerizable monomer selected from alkoxy polyethylene glycol esterification intermediates, and a photoinitiator which is benzoin. According to the concrete water reducing agent provided by the invention, the alkoxy polyethylene glycol esterification intermediate is adopted, slump retaining performance and water reducing performance can be both considered, meanwhile, the reaction can be carried out at normal temperature or low temperature, monomer prepolymerization is directly initiated through light irradiation, the polymerization rate is greatly increased, the synthesis conversion rate is increased, and the sensitivity is reduced; and in addition, the sulfonic acid group is added, so that the surfaces of cement particles can be stably adsorbed, the hydration reaction can be effectively delayed, the dispersing and slump retaining effects in concrete with medium and low strength grades are enhanced, and the market application prospect is extremely wide.

The invention relates to the field of concrete, and particularly discloses a high-strength concrete mixture, a preparation method thereof and concrete. The preparation method of the high-strength concrete mixture comprises the following steps: step 1) stirring and uniformly mixing water, cement and a retarder under the action of ultrasonic waves to obtain plain cement slurry; 2, adding an aggregate into the plain cement slurry and mixing to be uniform, and obtaining a concrete mixture, wherein the mass ratio of the cement to the retarder is 1: (0.014-0.016). The method has the advantage that the utilization rate of the cement is increased.

The invention discloses a wear-resistant repair material for a CFB boiler and a preparation method of the wear-resistant repair material. The wear-resistant repairing material is prepared from the following components in parts by weight: 45 to 50 parts of brown fused alumina powder, 3 to 5 parts of modified circulating fluidized bed ash, 1.5 to 2 parts of aluminum dihydrogen phosphate cementing agent, 0.8 to 1 part of explosion-proof fiber, 0.6 to 0.9 part of ceramic fiber, 0.2 to 0.5 part of dispersing agent, 2 to 3 parts of zirconium dioxide powder, 2.5 to 4 parts of yttrium oxide powder and 0.8 to 1.5 parts of titanium diboride powder. The preparation method comprises the following steps of: S1, preparing materials; S2, mixing powder; S3, carrying out pulping; and S4, carrying out roasting. The wear-resistant repair material for the CFB boiler has good wear resistance at a high temperature, is suitable for large-area repair and replacement of a dense-phase region of a hearth and the like, can also repair parts with complex structures of a water-cooling air chamber, can adopt an edited smearing repair method, and prolongs the service life of a CFB.