123results about How to "Improve cracking strength" patented technology

A bearing part comprising steel subjected to carbonitriding at a carbonitriding temperature exceeding the A₁ transformation temperature, and cooled to a temperature lower than the A₁ transformation temperature. The steel is reheated to a temperature for quenching that is not lower than the A₁ transformation temperature but lower than the carbonitriding temperature, and then quenched.

The invention provides an inorganic composite insulation board and a preparation method thereof, belonging to the technical field of novel building insulation materials. The inorganic composite insulation board is characterized by comprising the following components by weight parts: 40-48 parts of expanded perlite, 5-15 parts of phenolic foam particles, 32-36 parts of an inorganic binder, 2-6 parts of an organic reinforcing agent, 2-3 parts of a waterproof agent, 2-3 parts of inorganic enhance fibers, 1-2 parts of a hardening agent, and 1-2 parts of a fire retardant. The above raw materials are fully stirred, compressed, molded, and dried under a constant temperature to prepare the inorganic composite insulation board, and the board has advantages of good thermal insulation performance, light weight, small thermal conductivity coefficient, good stability, high intensity, convenient construction, etc., and can be widely applied in roofs and walls of various industrial and civil buildings, waterproofing and insulation of cold storages, barns and basements, as well as various cold insulation engineering.

The present invention relates to a double-component gypsum base polystyrene foam particle heat-insulating coating for thermal insulation of building internal wall, external wall and roof. Its composition includes (by weight portion) 2-6 portions of polystyrene foam particle, 4-10 portions of modified calcium oxide, 4-10 portions of synthetic resin emulsion, 35-45 portions of water, 0.1-1.5 portions of thickening agent, 0.1-1.5 portions of modifying agent, 0.1-2 portions of reinforcing fibre, 0.5-1.5 portions of delayed coagulant, 30-50 portions of calcined gypsum powder and 0.1-0.3 portion of foaming agent. Besides, said invention also provides its preparation method.

The invention belongs to the field of electric power materials and discloses a novel compound electric pole. The novel compound electric pole is prepared from concrete and a reinforcing mesh through compounding. The novel compound electric pole is prepared through uniformly distributing concrete in an electric pole mold with the reinforcing mesh through a material distribution machine, carrying out tensioning, carrying out centrifugation molding, carrying out standing for 4-5h and carrying out demolding. The novel compound electric pole has good performances and a wide application scope.

The invention provides a PC alloy material and a preparation method thereof. The PC alloy material is prepared by mixing the following components in parts by weight: 100 parts of PC resin, 18-25 parts of aluminium coated modified magnesium oxide powder, 12-16 parts of surface modified aluminum oxide powder, 5-8 parts of rutile type titanium dioxide, 6-12 parts of modified graphene, 3-8 parts of a composite toughing agent, 3-6 parts of a composite flame-retardant agent, 8-20 parts of a compatilizer, 1.5-2.5 parts of a silane coupling agent, 0.5-1.5 parts of an oxidation inhibitor, 0.5-1.2 parts of an anti-dripping agent and 1.5-2 parts of an ultraviolet absorber. According to the PC alloy material, the PC resin and the various kinds of powder are fused; the powder is modified so that the powder can be fused in the PC resin fused body well; and the composite flame-retardant agent and the composite toughing agent are innovated, so that the prepared PC alloy material has good mechanical property, thermal property, optical property and electrical property, belongs to a brand-new PC alloy material, and has wide market popularization and application prospects.

The invention relates to the technical field of construction materials, and provides an acoustic shielding backing plate and concrete thereof. The concrete is prepared from the following raw materials: a gelling material, aggregate, admixture, fibers and an additive, and has excellent durable mechanical performance. The acoustic shielding backing plate comprises a backing plate body, wherein an acoustic shielding slot is formed in the backing plate body along the length direction of the backing plate body, and first lightening holes are respectively formed in the bottom wall, first side wall and second side wall of the acoustic shielding slot along the length direction of the backing plate body; a male groove and a female groove are respectively formed in the side, far from the acoustic shielding slot, of the first side wall and the second side wall along the length direction of the backing plate body, and are matched in shapes; reinforcing holes are formed in the first side wall, the second side wall and a stiffener; and the impact resistance and bending strength of the backing plate can be remarkably reinforced by implanting reinforcing ribs, injecting a grouting material and plugging a grouting socket with concrete, and the durability and the stability can be greatly improved, and the absolute safety of the backing plate can be guaranteed. The acoustic shielding backing plate has an excellent supporting effect and an acoustic shielding effect.

The invention relates to a fabricated concrete wall structure. The fabricated concrete wall structure comprises a plurality of sets of prefabricated wallboards, the ground is horizontally arranged, a plurality of sets of bases with the same length as the wallboards are horizontally hoisted on the ground, sinking grooves are vertically and concavely formed in the upper end faces of the bases, the wallboards are matched with the sinking grooves in an inserted connection mode, a plurality of sets of inserting holes are vertically formed in the groove bottoms of the sinking grooves, steel chisels with the lower ends penetrating into the ground are inserted into all the sets of inserting holes, the upper end faces of all the sets of steel chisels and the groove bottoms of the sinking grooves are horizontally coplanar, the outer contours of the vertical sections of the bases are in an isosceles trapezoid shape, and the lower end faces of the bases abut against the ground. Settlement of the wallboards on the ground is remarkably reduced, the stability of the wallboards on the soft foundation ground is improved, and the structural stability of the fabricated building is improved.

The embodiment of the invention discloses an anti-crawler method, a device, a terminal and a readable medium for the data between live broadcasts. The method comprises the following steps: obtaining the data between live broadcasts; obtaining the data between live broadcasts; obtaining the data between live broadcasts according to the obfuscation rule file; obfuscating the data between live broadcasts. The confusion data with low confidentiality level in the adjacent confidentiality level is used to encrypt the confusion data with high confidentiality level once, the data encrypted once is used to encrypt twice by using the shared key, and the confusion data with the lowest confidentiality level is used to encrypt once by using the preset shared key. Encrypting the file name of the obfuscation rule file by using a shared key. The encrypted confused data and the file name are distributed to the client, so that the client can determine the live broadcast data according to the data distributed by the server. The anti-crawling method, the device, the terminal and the readable medium of the live broadcasting room data provided by the embodiment of the invention improve the data breakingstrength of the live broadcasting room, prevent the crawler from climbing to obtain the correct live broadcasting room data, and ensure the safety of the data of the live broadcasting room.

The invention relates to an asphalt mixture additive and a preparation method thereof. The asphalt mixture additive comprises the following components in parts by mass: 10-20 parts of a polymer, 5-10 parts of a cross linker, 10-20 parts of padding, 0.5-2 parts of a smog inhibitor, 1-2 parts of a plasticizer, 0.1-1 part of an antioxidant and 50-70 parts of matrix asphalt, wherein the matrix asphalt is one of Shell 70#, Shell 90#, SK70# or SK90#. Compared with the prior art, the asphalt mixture additive has the advantages that the anti-rutting performance and water damage resistance of an asphalt mixture can be significantly improved, the low-temperature cracking resistance and ageing resistance of asphalt concrete can be effectively improved, and the service life of asphalt roads is prolonged; meanwhile, the asphalt mixture additive can substitute about 15-25% of asphalt raw materials in the asphalt mixture, so that the production temperature is reduced to 140 DEG C, then the smoking phenomenon in the production and spreading processes is effectively reduced, and the asphalt mixture additive is energy-saving and environment-friendly; and the production method is simple, low in cost and suitable for industrialized production.

The invention provides a helix milling cutter with a compound blade, and the helix milling cutter has high efficiency, high strength and a long service life. The helix milling cutter is provided with a cutter handle or a locating hole and a cutter head which are connected with each other or integrated together, and the cutter head is integrally provided with a plurality of cutter stripes or cutter bodies or helix cutting stripes. The helix milling cutter with the compound blade is characterized in that: a definition is formed about the height relationship between a crack-resisting slitting platform or a high-efficiency slitting platform and an inside adjacent high-efficiency slitting platform; the included angle between a composite helix cutting face and an adjacent composite locating disintegrating platform is more than or equal to 90 DEG; or the height difference of two adjacent composite helix cutting faces is more than or equal to 0.01 mm, or less than four fifths of the thickness of an discharged chip, or less than or equal to a height accounting for 9 times of the cutting feeding amount; or the thickness of the crack-resisting slitting platform is more than 0.6 mm, or less than or equal to one third of the diameter of the milling cutter; or a helix groove is disposed at the composite helix cutting face.

The invention relates to the field of concrete, and particularly discloses anti-cracking recycled concrete and a preparation method thereof. A waterproof and corrosion-resistant wood board for a laboratory fume hood is prepared from 55-60 parts of cement, 20-30 parts of water, 25-30 parts of fly ash, 0.2-0.4 parts of cellulose ether, 6-8 parts of entangled fibers, 3-5 parts of SiO2 aerogel particles and 80-100 parts of recycled aggregate; The entangled fibers are prepared by mixing wollastonite fibers and polypropylene fibers according to a mass ratio of 1: (6-8). The preparation method comprises the following preparation steps of: S1, coating modification of recycled aggregate; S2, premixing treatment; and S3, mixing again. According to the recycled concrete, wollastonite fibers and polypropylene fibers are entangled and compounded and are mutually lapped to form a three-dimensional network, the three-dimensional network and a concrete aggregate structure jointly resist the action of shear force, and the anti-cracking strength of the recycled concrete material is improved.

The invention relates to the field of bridge construction, and discloses a combined beam. The combined beam comprises a concrete plate, wherein transverse steel bars are arranged in the concrete plateat intervals. The combined beam further comprises an inverted T-shaped steel beam, the inverted T-shaped steel beam comprises a web plate and further comprises a wing plate, wherein a connecting partis arranged on one side of the web plate, the connecting part is arranged in the concrete plate, the web plate is connected with the transverse steel bars through the connecting part, and the wing plate is connected with the web plate in a perpendicular mode. The invention further discloses a manufacturing method of the combined beam. The mode that the connecting part is connected with the transverse steel bars in the concrete plate is adopted in the combined beam and is compared with the mode that shearing force nails are adopted to achieve the connection between a steel plate and a concreteplate, the advantages of being high in shear stiffness, high in bearing capacity, good in ductility and the like; and in addition, the combined beam is simple in structure, convenient and fast to construct, high in cracking strength and good in durability. According to the combined beam and the manufacturing method thereof, the defects that when the mode that the shearing force nails are adoptedto achieve the connection between the steel plate and the concrete plate is adopted, the shear resistance and the bearing capacity of a connecting piece are low, the shear stiffness is low, and the ductility is poor are overcome, and the problems that the concrete plate is prone to cracking, and the durability is poor are solved.

The invention belongs to the field of electric power materials, and discloses an environmentally-friendly power transmission rack. The environmentally-friendly power transmission rack is made from, by weight, 1-2 parts of corn straws, 1-2 parts of peanut shells, 2-3 parts of polyurethane foam, 2-3 parts of eggshells, 2-3 parts of fish bone wastes, 2-3 parts of sodium dodecyl benzene sulfonate, 3-4 parts of a sodium hydroxide solution, 20-30 parts of phosphogypsum, 25-35 parts of fly ash, 30-40 parts of carbide slag, 35-45 parts of blast furnace slag, 40-60 parts of water, 60-80 parts of crushed stones and 100-120 parts of No. 42.5 ordinary Portland cement. The power transmission rack has the advantages of wide material sources, massive use of wastes, saving and environmental protection.

The invention provides a combined-edge center drill or combined-edge countersink and mainly relates to a machining twist drill for machining. The combined-edge center drill or combined-edge countersink is high in stability, high in radiating efficiency, long in service life and easy to position for drilling. The combined-edge center drill or combined-edge countersink is characterized in that cutting faces in the rotation direction are provided with at least one level of bottom or lateral various inner bevel cutting faces or various combined cutting faces in the manners of triangular grooves, or trapezoidal grooves, or arc triangular grooved indentations, or arc triangular grooved indentations, or arc projections or bevel projecting indentations; the inner bevel cutting faces or combined cutting faces have included angles of larger than 90 degrees and smaller than 180 degrees with the cutting faces or combined cutting faces; or by means of arc projections or bevel projecting upright extensions, the cutting faces are provide with combined positioning decomposition steps, intersecting with the inner combined cutting faces, and various inner bevel edges, or lateral indented edges or lateral bevel edges. Therefore, cutting stress inclines inwards, arms of force are reduced, outer cutting resistance is decomposed, cutting efficiency of the combined-edge center drill or combined-edge countersink is maximized, the service life of the combined-edge center drill or combined-edge countersink is maximally prolonged, the cost is reduced, and resources are saved.