81results about How to "Recovery strength" patented technology

The invention relates to a durability traceless repair method for road and bridge concrete. The method comprises the following steps of: (1) repairing a base surface of the concrete with a surface defect by using a repairing material so as to trim and flatten the base surface, wherein the repairing material comprises polymer fine sand mortar and color difference trimming putty; (2) performing prime coat on the repairing material; (3) preparing a trimming material, wherein the structure and color of the trimming material are similar to those of the concrete, and the trimming material has a high adhesive property; (4) performing floating coat by adopting an organic silicon resin coating; and (5) performing top coat by adopting a coating prepared from a silicon resin accessory ingredient. The formulas of the color difference trimming putty and the trimming material are introduced. The method has the advantages of effectively repairing the surface defect of the concrete structure tracklessly, restoring the strength of the concrete structure and improving waterproof property and durability of the concrete structure.

The invention discloses a coal tar hydrodemetalization catalyst and a preparation method thereof. The method comprises the steps of: (1) taking or preparing an alumina carrier; (2) treating the alumina carrier from the step (1) with an organic acid solution with pH value lower than 3; then impregnating the alumina carrier subjected to acid treatment with an aluminium nitrate solution; and drying and roasting to obtain a modified alumina carrier; and (3) loading and hydrogenating an active component by an impregnation method to obtain the coal tar hydrodemetalation catalyst. Compared with the prior art, the coal tar hydrodemetalation catalyst provided by the invention has better activity and activity stability, and longer operation cycle.

The invention provides a traffic tunnel crack plugging and reinforcement method used in a vibration-disturbed environment, and relates to the technical field of crack repair in traffic tunnels. The grouting material is poured by using the method of minimal damage and adopting the pinhole oblique side drilling method. , Reinforcing while plugging. The specific method is to use a cutting machine to cut grooves along the seam first, clean them up and fill them with special cement for sealing, then make grouting holes along both sides of the seam to 1/3 to 1/2 of the seam. The grouting nozzle is installed in the hole, the grouting material is injected, and through the sealing effect of the cutting groove, and through the cross grouting, the grout is injected into the depth of the crack, so that the lining concrete at the crack is restored to form a whole, which solves the existing problems in the prior art. The technical problem that underground engineering cannot effectively plug leaks in the vibration-disturbed environment prevents leakage and cracking due to vibration-disturbed deformation and damage, and restores the compactness and structural integrity of the lining concrete.

The invention provides a preparation method of a high polymer bonded explosive with a self-repair function, wherein the preparation method includes the following steps: step 1, firstly, carrying out areaction of excess diisocyanate with polyether/ester diol to produce a prepolymer with -NCO groups at both ends; step two, then, carrying out a reaction of furfuryl amine with a furan group with theprepolymer, to generate polyurethane with a furan end group; step three, carrying out a reaction of bismaleimide with the polyurethane, to generate a thermoplastic polyurethane with a DA bond; and step four, preparing a dilute solution from the thermoplastic polyurethane, and adding an explosive with metered proportioning; and heating to make the solvent gradually evaporated, then adding a properamount of deionized water, wrapping the surface of the explosive after the polyurethane is precipitated, filtering and drying, and thus obtaining the high polymer bonded explosive with the self-repairfunction. The invention also provides the high polymer bonded explosive with the self-repair function. The preparation method has the advantages of simple preparation process, mild conditions and high universality.

The invention discloses bisphenol-containing self-healing thermally-reversible cross-linked polyurethane and a production method thereof. The method comprises the steps of mixing a bisphenol compound,a polyisocyanate compound, a polyhydric alcohol compound and a catalyst, and conducting curing to obtain the bisphenol-containing self-healing thermally-reversible cross-linked polyurethane. By adopting the method, the re-processing self-healing thermally-reversible cross-linked polyurethane can be produced, so that the polyurethane is advantageously used for the aspect of self-healing coatings,intelligent devices, thermoplastic polyurethane elastomers, plastic or the like, and the problem that in the prior art, chemical cross-linked polyurethane is hard to recycle is solved.

The invention discloses a method for improving softening of high strength aluminum alloy welded joint. The method is as below: first heating a heating furnace to a solid solution temperature at a uniform speed; placing the welded workpiece into a furnace for heat preservation when the temperature is stable; after the heat preservation, taking out the workpiece; placing the workpiece into the cold water for quenching treatment; then placing the quenched workpiece into the heating furnace, and heating to aging temperature at a uniform speed for insulation; and after insulation, cooling the workpiece with the furnace to room temperature. Through solid solution treatment and artificial aging on the welded high strength aluminum alloy, the invention improves the problem of joint softening; and by means of hardness test and tensile test of the workpiece, the method can recover the strength of welded joint to more than 80% of the parent material.

Health equipment for dragging the lumber with the trunk of the human body securely supported is provided. The trunk support 2 is bendable only inwardly, and holds and supports the trunk of the human body. Since the trunk support 2 is placed around the human body and enfolds from the area below the costae to above the pelvis, the human body is securely supported, whereby lumbago treatment can be carried out with the patient suspended in the air. Since the lumber is dragged with the weight of the lower part of the patient's body, there is no possibility that the lumber is dragged with the excessive weight. The leg hanging unit 4 is a device to hang the legs of the patient. By using this leg hanging unit 4, so called mobilization may be carried out with the lower back portion suspended in the air, thereby increasing effectiveness of lumbago treatment.

The present invention relates to an elastic woven or knitted fabric that has an elastic yarn comprising an organic synthetic macromolecule disposed in at least part thereof, and has the following physical properties: (1) a stress at 10% elongation in a range of 100 to 600N per 5 cm width in at least one of a warp direction and a weft direction, and an elongation recovery factor at 15% elongation of at least 75% in the same direction; (2) a ratio ST1/ST2 of not more than 5, wherein ST1 is the stress at 10% elongation in one of the warp and weft directions, and ST2 is the stress at 10% elongation in the other one of the warp and weft directions, with the proviso that ST1>=ST2; and (3) a dry heat shrinkage factor at 180° C. in a range of 1.0% to 15% in each of the warp direction and the weft direction.

An implant device used to replace and restore the function of the knee meniscus in a human. The compliant, yet resilient device is comprised of a biocompatible, non-degradable three-dimensional body comprised of at least a central body, a second structure, a third structure, and a coating. The device is concentrically aligned wherein the second structure is adjoined to the central body wherein the third structure is adjoined on the central body opposite of the second structure. The third structure further features a first and a second pulling element which is coupled to the central body and forms the outer periphery and major circumference of the device. The device is comprised of multiple components which provide tensile strength, compressive resilience, and attachment mechanisms for replacing the meniscus. Each structure is comprised of multiple surfaces which are further reinforced, separated, and connected by an individual plurality of vertical elements. The implantable device further features a surface coating on the surface of the central body.

There is provided a method for repairing a member comprising a fiber-reinforced plastic, which method can repair a through hole easily at a low cost. When a through hole 20 is repaired, a temporary hole 11 is formed, a fabric sheet 30 comprising reinforcing fibers is rolled into a cylindrical shape and inserted into the temporary hole 11, the fabric sheet 30 is impregnated with a resin, the resin is cured, and a new through hole 20′ is formed.

The invention discloses a titanium slag-based solid waste cementing material and a preparation method thereof. The titanium slag-based solid waste cementing material comprises the following raw materials by weight: 70-80% of a titanium slag-based material, 15-25% of gypsum, and 2.5-7.5% of cement clinker. The preparation method is simple, and the used materials are subjected to separate or mixed grinding according to different types of grindability differences, and then are mixed and stirred. In the raw materials, the titanium-containing slag-based material is used as a main component and is matched with the cement clinker and the gypsum to form the gel material, so that effective comprehensive utilization of a large amount of high-titanium-containing slag and industrial byproduct gypsum resources produced by iron and steel enterprises in Panzhihua, Leshan sand bay and the like in the southwest region can be realized, most of conventional engineering applications can be met, and the material can also be used in a construction environment with rich tunnel terrestrial heat.

The invention discloses a preparation method of a damage self-healing polymer-based composite explosive. The preparation method comprises the following steps: step 1: firstly enabling excessive diisocyanate to react with polyether/ester diol to generate a prepolymer having -NCO groups at two ends; step 2: then enabling a diamine with a disulfide bond to react with the prepolymer having the -NCO groups at two ends to generate polyurethane having the disulfide bond; step 3: preparing the polyurethane having the disulfide bond into a diluted solution, adding an explosive in a metered proportion,heating the mixture to volatilize a solvent such that the polyurethane is precipitated and wraps the surface of the explosive, and filtering and drying to obtain the damage self-healing polymer-basedcomposite explosive. The high polymer product provided by the invention has a unique disulfide bond structure; after damage occurs inside the polymer-based composite explosive, dynamic exchange reaction of the disulfide bond occurs under a mild heating condition, so that the damaged part of the polymer-based composite explosive is re-bonded to recover the structure and the strength of the explosive.

The invention mainly relates to the technical field of leather processing and discloses a regeneration method of waste leather. The regeneration method comprises cleaning, softening, retanning, strengthening, drying and packaging, the method is simple and convenient to operate, softness and strength of the waste leather can be restored, secondary use can be achieved, and the traditional preparation method of recycling the waste leather and regenerating leather is avoided. The novel waste leather treating method is provided, the method is green and environmentally friendly, waste residues of raw materials are not generated, the waste leather is fully recycled, after being cleaned, the waste leather is placed into softening liquid to be subjected to low-temperature rotary drum soaking, thus,the softening liquid permeates into the waste leather slowly, softening treatment is carried out fully, the softening liquid is safe and healthy, does not contain any poisonous agent, contains plentyof polypeptide, bio-enzyme and protein polysaccharide, and can activate protein activity in the waste leather, and softness and smoothness of the leather are improved.

The invention discloses an anti-cracking treatment method for a rattan. The method comprises the following steps: treating the rattan in a dark environment of which the humidity is 65% to 68% and the temperature is 8 to 10 DEG C, and irradiating twice; subsequently soaking the rattan in warm water and putting in cold storage; dissolving chitosan in a saturated carbon dioxide water solution to prepare a solution for soaking the rattan; and treating the rattan by utilizing low-temperature plasma generated by dielectric barrier discharge at atmospheric pressure. In comparison with an existing rattan treatment method, the method disclosed by the invention has the advantages that a knitted product made from the rattan treated by the method disclosed by the invention is not deformed, free of cracks and very comfortable to skin in use; the bearing capacity is increased; the dimensional stability is good; decrustation of the rattan can be effectively prevented; after the rattan is knitted, the strength of the rattan is gradually restored and is increased by 2% to 3% in comparison with the original strength; the treated rattan is quite good in corrosion prevention effect, good in rattan softening effect and harder to mildew and damage in use; the knitted product prepared by the rattan treated by the method disclosed by the invention is free of mildew and worm damages and can be kept in the original color within at least 8 years.

The invention discloses a method for improving high temperature resistance and freeze thawing resistance of high strength recycled concrete. The method for improving durability of the high strength recycled concrete at high temperature (as high as 800 DEG C) and in an extreme freeze thawing environment (100 freezing and thawing cycles highest) is mainly realized by a method of the mixing of basalt fibres and later maintenance. The improvement of the freeze thawing resistance, permeability resistance and high temperature resistance of the concrete is facilitated by mixing the basalt fibres in the concrete, and environment damage and crack initiation and expansion under exogenic action of the concrete can be inhibited. When the mixing amount of the fibres is 4 kg/m<3>, the strength development of the recycled concrete is the fastest and stable, the strength is relatively high with 28 days of maintenance, the quality loss of the fiber recycled concrete is less than 1% after 100 times of freeze thawing, and the strength of plain concrete columns is relatively high after freeze thawing; 24 hours of underwater maintenance is beneficial to the strength recovery of the fiber recycled concrete after high temperature loss, and when the high temperature is less than 600 DEG C, the strength can recover to a same level.

A magnetic control pulling single-crystal superconducting magnet for conduction cooling comprises a coil framework, and an arc section of the coil framework is connected with a left and right coil cold conduction connecting device. The upper side of the left and right coil cold conduction connecting device is provided with a cold shield cold conduction device, and the lower side of the left and right coil cold conduction connecting device is provided with a coil cold conduction device; the first-stage cold head of a G-M refrigerator is connected with the second-stage cold head of the G-M refrigerator through a heat pipe; and the upper side of the cold shield cold conduction device is connected with the G-M refrigerator. The cooling method comprises the following steps: 1 setting the cooling magnetic control pulling single-crystal superconducting magnet; 2 filling the heat pipe with gas, and starting the G-M refrigerator to cool a test sample; and 3 achieving rapid cooling of the superconducting coil. The cooling method has the characteristic of high cooling efficiency.

The invention relates to a rattan softening method. The method comprises the following steps that (1), treating fluid is prepared; (2), rattan is soaked in the treating fluid for 15 hours to 20 hours at the temperature of 35 DEG C to 40 DEG C, and then, the rattan is fished out to be woven; (3), treating fluid B is used for treating, 75 parts of water is added into 3.8 parts of polyethylene glycol, mixed fluid is stirred at the temperature of 42 DEG C to 45 DEG C, and is fully dissolved, then, the woven rattan product is put into the mixed fluid to be soaked for 2 hours, 3.5 parts of sodium bicarbonate is added into the mixed fluid to be dissolved, the rattan continues to be soaked for 3 hours, and then is fished out, and clean water is used for washing out the rattan. The rattan softening method is simple, the fluid A and the fluid B are used for treating respectively, and after the fluid A treats the rattan, the flexibility of the rattan is increased, and the phenomenon that in the weaving process, the rattan is broken down or cracked, and the quality of a product is decreased is avoided; and after weaving is completed, the fluid B is used for carrying out soaking treatment, the strength of the rattan is restored, and the use performance is increased.