31results about How to "Good anti-corrosion and waterproof performance" patented technology

A device for strengthening a prestressed concrete (PC) steel bars of a panel point core area in a multi-high-rise frame space belongs to the field of civil engineering strengthening construction and comprises the panel point core area, L-shaped anchoring fasteners, the PC steel bars, nuts and sealing caps. A through hole is arranged at one end of each L-shaped anchoring fastener, and a bind hole is arranged at the other end of each L-shaped anchoring fastener and provided with inner threads. The panel point core area is a rectangular area formed by intersecting columns, beams and floor slabs, and polishing treatment is performed to four corners of the panel point core. Two ends of each PC steel bar are provided with outer threads. One end of each L-shaped anchoring fastener is connected with one end of each PC steel bar through the reserved blind hole inner threads, the other end of each L-shaped anchoring fastener penetrates through the other end of each PC steel bar with a reserved through hole to be connected with the nuts. The sealing caps are installed outside the nuts. Four L-shaped anchoring fasteners and four PC steel bars form a circle of PC steel bar hoops for restraining the panel point core area through the nuts. The device can directly bear shearing force, provide three-dimensional restraining effect, relieve stress lagging and improve common working conditions of a novel structure and an existing structure and stress conditions of the core area.

The invention relates to a device for strengthening a PC steel bar in a core area of a space node of a reinforced concrete cylindrical frame, belonging to the strengthening construction field of civil engineering. The device comprises a node core area, an arc anchoring buckle, PC steel bars, nuts and a sealing cap, wherein through holes are formed on two legs of the arc anchoring buckle; the node core area is a cylindrical area composed of a column, a beam and a floor, which are intersected; four arc corners of the node core area are polished; external screw threads are arranged on two ends of the PC steel bar; one leg of the arc anchoring buckle is connected with the nut by one end of the PC steel bar penetrating through the preformed through hole; the sealing cap is arranged outside the nut; four arc anchoring buckles and four PC steel bars form a round PC steel bar hoop for limiting the node core area by the nuts. The device can directly bear shearing force, provide three-way constraint action, relieve stress lagging and improve co-working condition of new and old structures and stress condition of the core area.

The invention discloses a method for manufacturing a high-strength railway reinforcing mesh. The method comprises the following steps that step 1, a steel bar straightening machine is utilized to straighten a steel bar, and then the steel bar is cut into segments according to the size; step 2, the segmented steel bars are added to a diluted hydrochloric acid solution to be oscillated for 2-4h andtaken out to be dried; step 3, the surfaces of the steel bars are coated with an ethyl cellulose alcohol solution and dried to obtain coated steel bars; step 4, the coated steel bars are straightenedand cut into reinforcing rods, the reinforcing rods are arranged to form a mesh structure, and connecting points of the reinforcing rods are marked; step 5, ethyl cellulose on the surfaces of the reinforcing rods at the connecting points is removed by using ethanol, and then the connecting points are subjected to abrasion cutting to form grooves; step 6, the interiors of the grooves are coated with a neoprene adhesive, assembly is performed to form a mesh structure, and the peripheries of the connecting points are welded and solidified; and step 7, a layer of high-density polyethylene film issprayed on the surface of a prefabricated steel mesh, and then illumination is performed for 1-2h to obtain the high-strength railway reinforcing mesh. The method solves the problem of corrosion of the reinforcing mesh in the concrete setting process.

The invention discloses a waterproof treatment equipment for wooden boards, which is characterized in that it includes a workbench and a longitudinal support and a transverse support fixedly arranged on the workbench front and back, the longitudinal support is provided with an adjustable transverse platen device, and the adjustable transverse platen device There is a horizontal heating device on the top, an adjustable longitudinal platen device on the horizontal support, a longitudinal heating device on the adjustable longitudinal platen device, and a temperature control device electrically connected to the horizontal heating device and the longitudinal heating device on the workbench. , the workbench is provided with a driving mechanism that simultaneously drives the adjustable horizontal platen device and the adjustable longitudinal platen device; It is processed and shaped, and the gap between the two final shafts can be adjusted by adjusting the screw, so that the final shaft can exert pressure on the wooden board, thereby compacting the tube holes on the surface of the wooden board, which has the effect of waterproofing and preventing deformation.

The invention relates to a method for preparing rubber master batch, which is applied to the technical field of anti-corrosive pipes. The rubber master batch is prepared from the following components in parts by weight: 12.5-13.5 parts of styrene butadiene rubber, 1.5-1.6 parts of nature rubber, 9.5-10.5 parts of kaolin, 11.5-12.5 parts of light calcium carbonate with average grain diameter of 1-5 microns; 3.0-3.5 parts of No. 40 engine oil, 1.5-2.0 parts of ethyl acetate and 2.0-2.5 parts of dioctyl phthalate. The method comprises the following step of: putting mixed raw materials into a rubber grinding machine to be ground to form the rubber master batch with the thickness of 1.5-2mm. The method for preparing the rubber master batch has the advantages of improving cold resistance of pressure-sensitive adhesive produced by adopting the rubber master batch to 8-12 DEG C, modifying the performance of the pressure-sensitive adhesive carried on anti-corrosive rubber, enabling the water vapor transmittance to be lower than 0.45mg / cm<2>, improving the anti-corrosive waterproof effect and enabling the water absorption to be lower than 0.30%.

The invention relates to an anti-corrosion anti-cracking reinforcing agent composition for concrete, mortar, and net slurry used in injection (first-aid repair) engineering, and a preparation method thereof. The composition comprises the following components on a percentage basis: 2-50% of micro-expansive powder, 5-30% of reinforcing powder, 5-20% of anti-corrosion compacting agents, 10-20% of plasticizers, 1-6% of catalysts, and 10-60% of carriers. The composition of the invention prepares solid and liquid products by processes of melting refinement, polymerization, ball milling, jet milling, complex formulation, and the like, and thus meets construction process requirements of different first-aid repair endurance engineering.

The invention discloses a double-layer reverse high-strength aluminum alloy armored ocean cable. The double-layer reverse high-strength aluminum alloy armored ocean cable comprises a cable core. A first anticorrosive coating is arranged on the outer side of the cable core, a first armoring layer is arranged on the outer side of the first anticorrosive coating and comprises a plurality of first molded single wires, and a second anticorrosive coating is arranged on the outer surface of each first molded single wire. A third anticorrosive coating is arranged on the outer side of the first armoring layer, a second armoring layer is arranged on the outer side of the third anticorrosive coating and comprises a plurality of second molded singles lines, and a fourth anticorrosive coating is arranged on the outer surface of each second molded single wire. The first molded single wires and the second molded single wires are stranded reversely. The double-layer reverse high-strength aluminum alloy armored ocean cable has the advantages that steel wires are prevented from being loosened effectively, and the service life of the ocean cable is prolonged; the anticorrosion and waterproofing effect is improved effectively; the overall strength of the armoring layers is improved effectively.

The invention discloses an aqueous polyurethane antiseptic and waterproof coating with high cohesiveness. The coating comprises the following raw materials in parts by weight: 40-50 parts of polyurethane emulsion, 15-20 parts of pyridine ionic liquid, 5-8 parts of bamboo powder, 3-5 parts of nanometal, 18-22 parts of inorganic functional filling, 8-10 parts of vegetable oil, 1-3 parts of 2-naphthol, 1-3 parts of isopropyl myristate, 0.5-1 part of dibutyltin dilaurate, 1-3 parts of dimethyl sulfoxide, 3-5 parts of surfactant, 1-2 parts of coalescing agent and 60-80 parts of water. In the invention, pollution-free and environment-friendly ionic liquid is used as a cosolvent, the cohesiveness of the polyurethane emulsion can be greatly improved, and furthermore, nano-particles are uniformly dispersed in the coating, so that the difficult problem of aggregation of the nano-particles is solved. The coating provided in the invention has the advantages of strong cohesiveness, crack resistance, good waterproof performance, good corrosion resistance in severe environments such as acid, alkali, salt and oil, and obviously prolonged service life.