34results about How to "Improve repair strength" patented technology

The invention relates to the field of buildings, and particularly provides a method for repairing a crack in a historic building wall. The historic building wall is formed by piling of rock and is provided with the crack extending in the vertical direction, and the width of the crack is larger than 10 mm and smaller than or equal to 30 mm. The method comprises the steps of arranging a plurality of rebar digging saws which cross the crack and are perpendicular to the vertical direction of the wall along the crack, wherein two or three layers of rock exist between every two adjacent rebar digging saws; blocking the crack with composite mortar; installing a plurality of grouting nozzles used for pouring the composite mortar into the crack in the composite mortar used for blocking the crack along the crack from the bottom of the crack, wherein the distance, in the vertical direction, of every two adjacent grouting nozzles is first distance; conducting low-pressure injection of the composite mortar into the crack through the multiple grouting nozzles in sequence.

The invention discloses a corrosion-resistant aluminum alloy sectional material and belongs to the technical field of metal material manufacturing. According to the corrosion-resistant aluminum alloysectional material, on the one hand, raw materials of an aluminum alloy substrate can be improved, proportioning and combination of different components are optimized, the strength and the corrosion resistance of the aluminum alloy substrate are enhanced in a whole, and the aluminum alloy substrate is further protected in a mode that a nano ceramic coating covers the surface of the aluminum alloysubstrate; and on the other hand, embedded repair rods are innovatively brought into the aluminum alloy substrate, part of internal stress can be eliminated while the strength of the aluminum alloy substrate is improved, moreover when the nano ceramic coating is corroded or damaged, repair actions of the embedded repair rods is triggered by means of a prone-to-corrosion part, repair magnetic ballsare actively attracted to a corroded position or a damaged position on the basis of a magnetic attraction function to perform repair, further corrosion or damage is avoided, the sectional material issuitable for self-repair under various corrosion conditions, the corrosion resistance of the aluminum alloy substrate is effectively improved, and the service life of the aluminum alloy substrate isprolonged.

The invention relates to the technical field of road maintenance, in particular to a crack repairing device with a cleaning function for road construction. The crack repairing device with the cleaning function for road construction comprises a vehicle body, a cleaning mechanism, a sweeping mechanism, a dust collection mechanism and a repairing mechanism; wheels are fixedly installed at the four corners of the bottom of the vehicle body; a push handle is fixedly installed on the side wall of the vehicle body; a supporting plate is fixedly installed on the side wall of the vehicle body; a box body is fixedly installed at the top of the supporting plate; the cleaning mechanism is installed at the bottom of the box body; the driving mechanism is further installed in the box body; the sweeping mechanism is installed at the bottom of the vehicle body; the dust collection mechanism is installed at the bottom of the vehicle body; and the repairing mechanism is installed at the bottom of the vehicle body. The crack repairing device with the cleaning function for road construction has the advantages that road gaps can be cleaned, so that asphalt can more uniformly flow into the gaps to repair a road.

The invention relates to the field of pavement maintenance, in particular to a color landscape pavement maintenance material and a preparation method thereof. The curing material is prepared by mixingdecolored emulsified asphalt, hydraulic inorganic cementing material and inorganic colored coloring pigment. An emulsifying agent should be added when the maintenance material works in a constructionenvironment at the temperature of lower than 5 DEG C. The color landscape pavement maintenance material has the same color repairing effect, and meanwhile, the problems of pavement crack repairing and original pavement appearance retaining are solved. The hydraulic material in the material has certain rigidity after being coagulated, and the emulsified asphalt has certain flexibility after beingdemulsified, so that the repair strength of the material is higher than that of the emulsified asphalt and a slurry sealing layer.

The invention discloses a concrete repairing material which comprises the following raw materials in parts by weight: 30-35 parts of sulfate aluminum cement, 8-10 parts of quartz sand, 6-8 parts of river sand, 20-25 parts of epoxy-polyurethane composite material, 2-4 parts of heat releasing material, 2-3 parts of thermal changing material, 2-3 parts of water reducer, 0.5-0.6 part of anionic surfactant and 1-2 parts of retarder. After the concrete repairing material is added into a crack in initial stage, the thermal changing material shrinks after being heated, a sufficient space is leaved forother polymer materials and base stocks to flow into a gap, and more base stocks and polymers are accommodated in the gap. After heat dissipation, the thermal changing material swells, so that the crack is filled with base stocks and polymers and higher repairing strength can be achieved.

The invention discloses a method for repairing concrete after a fire. The damaged concrete is repaired through a PCM by determining PCM repair parameters of the to-be-repaired damaged concrete, wherein the PCM can penetrate into pores of the concrete and thus can fuse with the damaged concrete, and therefore, when the PCM is utilized to repair the concrete after the fire, the durability and repairstrength of the PCM are higher than those in the prior art; and secondly, when the PCM is utilized to repair the damaged concrete, the requirement for the levelness of the damaged concrete is avoided, and thus the repair limitation of the PCM is small. In addition, the invention further discloses a device for repairing the concrete after the fire, and a storage medium, and the effects are achieved.

The invention discloses a light-weight aluminum alloy die casting surface treatment method, and belongs to the technical field of aluminum alloy die casting. A plurality of evenly-distributed repairing capsules are pre-embedded in a preservative layer of an interlayer; then a chemical foaming reaction is triggered in a forming process; bubbles are formed in the preservative and decomposed in the heating process to generate a large amount of gas, so that a continuous porous structure is formed; meanwhile, the repairing capsules serve as aggregate to support and reinforce the porous structure; meanwhile, the strength and shock resistance of the preservative layer are improved; and after the surface of a aluminum alloy die casting is damaged, under the porous structure characteristic of the preservative layer, external air makes contact with the repairing capsules; then the repairing capsules replace the aluminum alloy die casting to generate an oxidation reaction; heat is generated to trigger a healing action; damage to the surface of the aluminum alloy die casting is repaired; direct contact with the external environment is avoided; and therefore, the anti-corrosion performance of the aluminum alloy die casting is guaranteed.

The invention relates to the technical field of aviation equipment body structure microwave curing repair, in particular to a self-adaptive portable microwave heating repair bag, a manufacturing process and a using method, the repair bag comprises a to-be-repaired piece, and further comprises a vacuum bag film connected to the to-be-repaired piece through a sealing rubber strip; demolding cloth and an isolating membrane; the self-adaptive portable wave absorbing bag is arranged above the vacuum bag film; a portable microwave radiator cavity; and packaging the assembly. According to the invention, the self-adaptive portable microwave heating repair bag is manufactured by selecting the wave absorbing liquid, selecting the material of the wave absorbing bag and analyzing and selecting the packaging process, so that the curing speed is accelerated, the matrix is uniformly heated, the repair strength is improved, the self-adaptive portable microwave heating repair bag is not influenced by the attribute of the repair material, and the service life of the repair bag is prolonged. The application range of the microwave curing technology is expanded while the strength of the repair area is further improved; in addition, the mode of absorbing waves through liquid and transmitting waves through the outer bag is adopted, and on the premise that rapid heating is achieved, it is effectively guaranteed that the temperature in the bag is uniform.

The invention provides a cement-based polymer cementing material for duct piece repairing and a duct piece repairing method. The material is prepared from the following components in percentage by weight: 55.5 to 58.8 percent of tailing slag; 30 to 35 percent of ordinary Portland cement; 8 to 10 percent of white cement; 0.9 to 1.2 percent of redispersible rubber powder; and 0.3 percent of cellulose ether. The duct piece repairing method comprises the following steps of: S1, estimating the total weight of a required cement-based polymer cementing material, and pouring the material into a container; S2, adding water into the container, the ratio of the cement-based polymer cementing material to the water being 1: 2.5, and stirring an obtained mixture until the mixture is fully wetted and uniform; S3, smearing/filling a to-be-repaired area with the mixture so as to complete the repairing of a duct piece. The material is high in setting and hardening speed and repairing strength; and the repairing method is simple and convenient and can shorten the waiting time of a repaired duct piece and increase the delivery speed of the duct piece.