37results about How to "Dense internal structure" patented technology

The invention discloses a high-durability damping concrete and a preparation method thereof, and relates to several concretes and a preparation method thereof. The invention solves the problems of low damping capability and poor durability of the conventional concrete structure material per se. The high-durability damping concrete is prepared by stirring and mixing cements, rubber powder, water, medium sand, stones, and adding fibers and silicon powder. In the invention, c the loss factors of the high-durability damping concrete are improved by about 80-200 percent compared with that of pain concrete under the condition of different frequencies. After maintenance for 28 days, the concrete prepared by using the method has chloridion-resistant permeability and carbonizing-resistant capability both superior to that of blank concretes.

The invention discloses a modified dolomite powder based mineral admixture. The modified dolomite powder based mineral admixture is prepared by uniformly mixing the following raw materials in parts by weight: 50-60 parts of dolomite powder, 15-20 parts of mineral powder, 15-20 parts of fly ash and 5-10 parts of bentonite. Besides, the invention also discloses a preparation method of the admixture. According to the invention, the dolomite powder is used as the concrete mineral admixture, thereby obviously enhancing the working performance of cement concrete, improving water bleeding, ensuring the strength and durability, lowering the cost, and achieving remarkable economic and social benefits.

The invention provides a preparation method for an aluminum oxide-based ceramic continuous fiber containing 1-5 wt% of B2O3. The method comprises the following steps that alumina sol containing Al13 colloidal particles, a pseudo-boehmite nano-dispersion, silica sol, a boric acid aqueous solution and a high-molecular spinning auxiliary are mixed so as to obtain a mixed solution; then aging and concentrating are carried out until the viscosity of a system is 500-1000 Pa*s so as to obtain spinnable precursor sol; and dry spinning, drying and calcining are carried out so as to obtain the aluminumoxide-based ceramic continuous fiber. According to the preparation method, the electron deficiency effect of boron is utilized, and addition reaction of water is carried out on the boric acid to formB(OH)4<->, so that the boric acid can be stably combined with polyhydroxyl pseudo-boehmite nano-particles so as to prepare the spinnable precursor sol and the fiber with excellent properties. The method has the advantages that the raw materials are easy to obtain, and industrialized application is easy to realize; and the diameter of the prepared fiber is 5-8 microns, the strength of the single fiber can reach 2.0 GPa, the modulus can reach 149 GPa, and various excellent performances such as high temperature resistance, flexibility and spinnability are achieved.

The invention relates to the technical field of 3D (Three-dimensional) printing, and discloses a 3D printing process intelligent forging casting hammer and a 3D printer. According to the 3D printing process intelligent forging casting hammer provided by the embodiment of the invention, a driving device is connected with a rotating arm so that a mechanical arm rotates, stretches and retracts relative to a fixed seat. A first rotating device is connected with the mechanical arm, and is used for driving the mechanical arm to rotate relative to the rotating arm, so that the mechanical arm rotates vertically relative to the fixed seat. The first rotating device drives the mechanical arm to rotate vertically relative to the fixed seat, so that the mechanical arm drives the forging casting hammer to stretch away from or retract to the fixed seat. The mechanical arm drives the forging casting hammer to perform forging casting machining on a product which is manufactured by a 3D printing machine; and the compactness of the internal structure of the product can be greatly improved by utilizing the forging casting machining process, meanwhile, the internal stress response of the product is eliminated, and the product quality is improved. The 3D printing machine provided by the embodiment of the invention also has the beneficial effects because of comprising the 3D printing process intelligent forging casting hammer.

The invention relates to the field of organic silicon pouring sealants, and particularly discloses a high-thermal-conductivity low-viscosity two-component organic silicon pouring sealant and a preparation method thereof. The organic silicon pouring sealant is composed of a component A and a component B, the component A is prepared from the following raw materials in parts by weight: 15 to 25 parts of vinyl silicone oil, 2 to 5 parts of polydimethylsiloxane, 0.3 to 0.5 part of a silane coupling agent, 0.2 to 0.4 part of a catalyst, 160 to 185 parts of spherical aluminum oxide and 0.2 to 0.5 part of an anti-settling agent; and the component B is prepared from the following raw materials in parts by weight: 13 to 21 parts of vinyl silicone oil, 2 to 5 parts of polydimethylsiloxane, 0.3 to 0.5 part of a silane coupling agent, 2 to 5 parts of hydrogen-containing silicone oil, 160 to 185 parts of spherical aluminum oxide, 0.02 to 0.1 part of an inhibitor, 0.2 to 0.5 part of an anti-settling agent and 0.1 to 0.5 part of carbon black.

The invention relates to a high-alumina refractory brick and a preparation method thereof, and belongs to the technical field of building materials. According to the technical scheme, the surfaces ofmonodisperse polystyrene microspheres are filled with a compact glass conversion layer; the glass frit and the clay form complex glazed porcelain in the melting and sintering process, so the structural performance of the material is further improved, thus improving fire strength of material; meanwhile, the high-alumina bauxite material is adopted as a main base material, pores of the brick body are filled with the high-alumina bauxite micro-powder under the high-temperature condition after high-temperature calcination, so sintering is promoted, the mechanical strength, high-temperature resistance and durability of the brick body can be effectively improved, fire resistance is effectively achieved, and the mechanical property of the material is improved.

The invention discloses a high-toughness, durable and antiskid steel bridge deck pavement structure and a construction method thereof. The steel bridge deck pavement structure comprises a steel bridgedeck steel plate; a bonding bottom layer, a buffer layer, an adhesion layer and a wearing layer are sequentially laid on the surface of the steel bridge deck steel plate from bottom to top; the buffer layer and the wearing layer are both made of high-toughness modified asphalt concrete composed of aggregate, filler and asphalt cement, the thickness of the buffer layer is 1-3 cm, and the thicknessof the wearing layer is 2-3 cm. The bridge deck pavement structure has good high-temperature rut resistance, fatigue durability, skid resistance, bonding strength and deformation compliance, comparedwith epoxy asphalt concrete, the engineering cost is greatly reduced, the construction process is simple, and later maintenance is convenient.

The invention relates to a test mould for preparation of a shear thickening glue test piece and a using method thereof. The test mould comprises a base device, a test piece mould device and a test piece compaction device, wherein the base device comprises a base, a fixed slot, a buffer foam layer, a support frame, a cross beam and a threaded hole; the test piece mould device comprises an outer design finalizing cylinder and a jointable sheet-like cylinder; and the test piece compaction device comprises a screw, a piston type pressing plate and a handle. The test mould is capable of improving the compaction and moulding quality of the shear thickening glue test piece while simplifying the manufacturing process of the shear thickening glue test piece, and is suitable for the manufacturing ofthe shear thickening glue test piece for rheological test. On the basis of characteristics of shear thickening glue, the shearing speed is relatively low in the test piece preparation process, and the fluid state between shear thickening glue particles is lubricating contact and deformation is easy to occur, the jointable sheet-like cylinder overcomes the difficulty, solves the problem that the test pieces is easy to destroy when being directly taken during traditional test piece preparation, and a broad application prospect is provided in the aspect of preparing the shear thickening glue test piece in laboratories.

The invention discloses a construction method for improving the quality of concrete explosion points. The method comprises the following steps of acquiring positions of all explosion points of a building to be constructed; keeping water and maintaining all the explosion points; removing any explosion point until concrete inside the explosion point is exposed, and removing and roughening concrete interfaces except all the explosion points; attaching and fixing a steel wire mesh to all concrete and the concrete interfaces; and coating polymer mortar on the steel wire mesh layer by layer to forma flat mortar surface. According to the construction method for improving the quality of the concrete explosion points, when the concrete building with the explosion points is repaired, the explosionpoints are eliminated, surface reinforcement and waterproof sealing are realized on concrete components with the explosion points of the concrete building, the integral structural performance of the concrete building is improved, the consumption of materials in the construction process is small, and the construction period is short.

The invention provides a anorthite light refractory material not prone to cracking and a preparation method thereof. The anorthite light refractory material is prepared from 48-55wt% of coal gangue, 3-6wt% of kyanite, 4.5-6.5wt% of pyrophyllite, 10-14.5wt% of refractory clay, 9.5-15.5wt% of calcium carbonate, 5-10wt% of high-alumina cement, 1-3wt% of zirconium-containing fibers and 3-8wt% of an additive, wherein the content of Al2O3 in the zirconium-containing fiber is 35-50wt%, and the content of zirconium in the zirconium-containing fiber is 14-20wt%; and the particle size of the refractoryclay is 300-400 meshes, and the particle size of the calcium carbonate is 550-650 meshes. By adjusting the grain composition of the raw materials used by the anorthite refractory material and cooperatively using the zirconium-containing fibers, the internal structure of the prepared anorthite cast brick is more compact after being sintered, so that the anorthite cast brick has higher compressive strength and is not easy to crack.

The invention provides a preparation method of silicon nitride ceramic granulation powder, and belongs to the technical field of silicon nitride ceramics. The preparation method comprises the following steps: grinding and mixing a sintering aid, water and silicon nitride raw powder to obtain first slurry; dissolving polyvinyl alcohol and polyethylene glycol into water to obtain a glue solution, wherein the mass ratio of the polyvinyl alcohol to the polyethylene glycol is (0.16-0.20):1, and the total mass of the polyvinyl alcohol and the alcohol polyethylene glycol is 2-8% of the total mass of the sintering aid and the silicon nitride raw powder; mixing the first slurry, the glue solution and a dispersing agent to obtain second slurry; and carrying out spray granulation on the second slurry to obtain granulated powder, wherein the inlet temperature of the spray granulation is 300 to 340 DEG C. According to the method disclosed by the invention, the apparent density of the silicon nitride ceramic granulation powder can be improved to 0.92 g/cm<3> or above.

The invention provides a reinforced magnesium phosphate cement composite material and a preparation method thereof, the composite material comprises a graphene oxide/carbon nanotube composite modifierand a magnesium phosphate cement dry material, the graphene oxide/carbon nanotube composite modifier is compounded by graphene oxide and carbon nanotubes, The ratio of the total dry weight of the graphene oxide and the carbon nanotubes to the dry weight of the magnesium phosphate cement dry material is 0.01-0.5: 100. The method comprises the following steps: preparing the graphene oxide/carbon nanotube composite modifier; mixing the prepared graphene oxide/carbon nanotube composite modifier with the magnesium phosphate cement dry material, and uniformly stirring to obtain cement paste; pouring the cement paste into a mold for shaping, removing bubbles through oscillation, covering the surface of the mold with a film, demolding after curing, and finally curing to the use age. The preparedmagnesium phosphate cement is high in strength and good in mechanical property, the internal structure is neat and compact, the pore structure is optimized, and the durability is good.

The invention provides an environment-friendly ceramsite brick and a production method thereof, and relates to the technical field of building material manufacturing. The environment-friendly ceramsite brick comprises the following raw materials in parts by weight: 50-80 parts of ceramsite, 20-25 parts of straw, 10-15 parts of fly ash, 3-5 parts of glass beads, 3-5 parts of methyl bentonite, 1-3 parts of a flame retardant, 1-3 parts of a polystyrene resin solution, 3-5 parts of a water-retaining agent, 1-3 parts of nano-zinc oxide, 1.5-2.5 parts of a chelating agent and 2-3 parts of an adhesive. The straw and the fly ash are added into the raw materials, the fly ash is an active hydraulic material and can continue to generate a hydration reaction in a humid environment, so that the internal structure of the ceramsite brick is denser and the strength is improved, the straw and the fly ash are cheap raw materials so that the production cost investment of the ceramsite brick can be reduced, the viscosity among various raw materials can be increased through the methyl bentonite and the chelating agent, so that the strength of the ceramsite brick is improved.

The invention discloses a technology for forming high-viscous materials in a mould, which mainly relates to the forming manufacture technology for food, resin, chemicals, ceramics, printing ink, argil and other high-viscous materials, and belongs to the technical field of forming of the high-viscous materials. The technology comprises the following steps: (1) a high-viscous material is extruded and pressed into the mould; (2) the mould containing the raw material is arranged in a centrifuge which is adjusted to rotate at 200 to 3000 rpm, and proper speed is adjusted; (3) the centrifuge is subjected to timing rotation until the raw material is uniformly distributed in the mould; (4) the mould is taken out of the centrifuge, and curing is performed according to properties of the raw material. The technology process disclosed by the invention is simple in operation and good in forming effect; shapes can be changed according to various kinds of moulds, and formed products are compact in inner structure and smooth in surface, so that the requirement of life quality is met; and furthermore, the manufacture cost is low, so that the technology is easy to promote.

The invention relates to masonry mortar and a preparation method thereof, and the masonry mortar is prepared from the following raw materials in parts by weight: 25-35 parts of cement; 10-20 parts of modified ceramic polishing powder; 28 to 38 parts of sand; 1-2 parts of a polycarboxylate superplasticizer; 1-2 parts of a thickening agent; water; modifying the activity gt of the ceramic polishing powder; 65%. According to the masonry mortar and the preparation method thereof provided by the invention, the modified ceramic polishing powder is used for replacing fly ash and mineral powder in the masonry mortar, so that the stability of the performance of the masonry mortar is improved.