33results about How to "Long-term stable performance" patented technology

The invention discloses a high-flow-degree blow-reclamation sea mud anti-seepage curing material and a preparation method thereof. The material includes a component A and a component B, wherein the component A comprises 30-60 parts of active inorganic minerals, 10-30 parts of a cementing material, 10-20 parts of gypsum, 5-12 parts of quick-dissolving sodium silicate, 2-5 parts of quick lime and 1-3 parts of a stabilizing agent, and the component B is one selected from or is a mixture composed of blow-reclamation sea sand and sea mud, wherein the granular size of the component B is not more than 5 mm, the dry mass ratio of the component A to the component B is 1-5:1, and water cement ratio is 0.2-0.5. The material is prepared from easy-to-obtain raw materials and is easy and convenient to prepare, is low in cost and is suitable for large-scale application. The anti-seepage curing material has excellent mechanical performance, good dry shrinkage property, low anti-seepage coefficient and good anti-erosion performance, high grouting flowability and excellent groutability, and has very wide application prospect in the fields of curtain grouting, coastal dam anti-seepage engineering and the like.

The invention discloses an expansive soil composite roadbed structure type and a construction method thereof. The expansive soil composite roadbed structure type includes a bottom isolation layer, an expansive soil core filling area, side reinforcement and anti-seepage areas, a geocell protection area, and an upper road Embankment, road bed, pavement structure layer. The expansive soil composite roadbed of the present invention can form a closed water-proof or water-blocking system, avoid external moisture from infiltrating the expansive soil core-filling area, ensure stable humidity in the expansive soil core-filling area, and ensure long-term performance stability of the expansive soil roadbed. At the same time, the The roadbed structure type can not only maximize the use of expansive soil along the line as roadbed filler, but also make up for the disadvantages of no available edge-wrapped soil source and chemical improvement to pollute the environment, which is in line with the concept of ecological and environmental protection.

The invention relates to a method for preparing efficient aerated mixed powder of an AgSnO2 wire. The method comprises the steps as follows: aluminium powder and putty powder are placed into a mixing pot and stirred to obtain mixed powder; then the mixed powder is sucked into an efficient powder-mixing machine for mixing; then the mixed powder is placed into a cold isostatic press for compression moulding; the pressed mixture is taken out and placed into a vacuum sintering furnace for vacuum sintering; the sintered mixture is placed into an extruder for extruding, and then the mixture is placed into an ultrasonic washing machine for washing filaments on the surface of the mixture; and the mixture is subjected to vacuum annealing, finally the final reactant is subjected to wire-drawing through a wire-drawing device, and a finished product with the required diameter is obtained. The method solves the problems of aluminium powder agglomeration and putty powder agglomeration as well as hardness and density of the AgSnO2; the long-term performance of the finished product is stable, and the plasticity and the performance of the material are improved.

The invention relates to a safety monitoring method and device for an assembled bridge with a small and medium-sized span, belongs to the technical field of bridge monitoring, and solves the problems in the prior art that the monitoring indicators are not well targeted and the monitoring cost is high. The method includes selecting the first monitoring point, the second monitoring point and the third monitoring point of the bridge to be monitored; respectively measuring and obtaining the strain data at the first monitoring point, the deflection data at the second monitoring point and the Acceleration data, and obtain the transverse correlation coefficient of the adjacent two girders of the bridge to be monitored based on the measured strain data, and obtain the natural frequency of the bridge to be monitored based on the measured acceleration data; the obtained strain The data, deflection data, transverse correlation coefficient or natural frequency are compared with the corresponding preset thresholds to obtain the safety monitoring results of the bridge to be monitored. This method proposes a complete monitoring system for small and medium-span prefabricated bridges, which improves monitoring accuracy and effectiveness while reducing monitoring costs.

The invention discloses a magnesium gel material, a preparation method and an application for preparing a glass magnesium plate. The phenolic resin foamed glass magnesium plate includes magnesium cement and foamed phenolic resin, and the foamed phenolic resin includes phenolic resin, foamed Foaming agent, catalyst and toughening agent. During preparation, mix phenolic resin, foaming agent, catalyst and toughening agent, keep warm at 50-70°C for 2-4 hours, add magnesia cement slurry and mix; Then maintain under natural conditions until the moisture content meets the requirements, and the glass magnesium plate is obtained. The present invention mixes the foamed phenolic resin with magnesium cement, utilizes the water resistance, cohesive force and fire resistance of the phenolic resin itself, makes the internal structure of the magnesium cement more dense, and greatly improves the water resistance and water resistance of the glass magnesium plate. Crack and fire resistance, long-term stable performance, can meet all the current performance requirements for glass magnesium panels for flue and exhaust ducts.

The invention belongs to the technical field of pavement material engineering, and particularly discloses a high-strength pavement functional material for laying a stress absorption band. The material is prepared from the following raw materials in parts by weight: 100 parts of asphalt, 6-12 parts of thermoplastic styrene-butadiene rubber (SBS), 0.5-1.5 parts of polyphenylether, 20-30 parts of epoxidized natural rubber and 3-5 parts of fiber. The high-strength pavement functional material has the advantages of high tensile strength, favorable bonding power with the pavement structural layer, temperature change resistance, simple construction process and the like, has favorable effects for treating old cement concrete pavement cracks and asphalt pavement cracks and preventing crack reflection when being used in cement concrete pavement modification combined pavement engineering and asphalt pavement laying engineering, and has important meanings for enhancing the service life and roadability of the combined pavement.

The present invention relates to an electrochemical oxygen sensor, in particular to a hydrogen palladium electrode electrochemical oxygen sensor, comprising a hollow shell, an electrode base is sealed and installed on the upper end of the shell, an oxygen permeable film is covered on the lower end of the shell, and the electrode base A coaxial cylindrical double electrode body is arranged between the oxygen permeable membrane. The outer layer of the cylindrical double electrode is a hydrogen palladium electrode as an anode, the middle layer is glass as an insulating layer, and the inner layer is a platinum electrode as a cathode; The working end surface of the electrode body is in contact with the oxygen-permeable membrane; the electrolytic chamber between the shell and the cylindrical double-electrode body and between the electrode base and the oxygen-permeable membrane is filled with a gel electrolyte, which includes the following proportional weight The combination of parts: 70-79 parts by weight of potassium chloride, 4-5 parts by weight of agar, and 1000 parts by weight of water. The metal electrode of the sensor does not participate in the electrochemical reaction, and the reaction product is water, no metal precipitation, no coating shedding, long-term stability of the electrode potential, longer life of the oxygen sensor, and superior long-term stability.

The invention discloses a robot joint zero-point automatic calibration end performing device, and the device comprises a mechanical arm disposed on a robot body, and an external positioning ball. The mechanical arm consists of three laser distance sensors which are perpendicular to each other. The three laser distance sensors are used for carrying out the automatic calibration of a robot joint through touching the surface of the positioning ball. The device is high in precision, is lossless, and is stable in long-time performance. An automatic calibration method is used for directly measuring the position and vector of each shaft, thereby avoiding the calculation and model errors, improving the control precision of a robot, and reducing the machining precision and cost of the robot.

The invention discloses a vegetation rod for desert planting as well as a manufacturing process and a use method thereof. The vegetation rod is internally provided with a water storage layer, so as to ensure the moisture during a growth process of plant seeds in the vegetation rod, and the moisture is buried at the bottom of a moving dune so as to prevent the movement of the moving dune and ensure the firmness of the moving dune; after irrigation, re-irrigation is not needed, and the plant seeds in the vegetation rod germinate and grow so as to break through a non-woven fabric at an outer layer and then grow out of the surface of the dune, so that desert planting is realized, layout is easy to implement, manpower and material resources are saved, ecological and economic benefits can be achieved stably for a long term, ecological restoration and ecological construction are quickened, and the vegetation rod has favorable application prospect.

The invention relates to an optical fiber vibrating sensor and a power transmission line aeolian vibration monitoring system applying the same. The optical fiber vibrating sensor comprises a fixed body, a constant-strength beam and a contact body arranged on a lead wire, wherein the fixed body, the constant-strength beam and the contact body are connected in sequence. The fixed body is connected with the lead wire through a clamp arranged on the lead wire, and the upper and lower surfaces perpendicular to the axis of the constant-strength beam are symmetrically provided with fiber bragg gratings. The sensor is installed by adopting an upright method of hull section construction, and an installing point is a fatigue dangerous point of a ground conductive wire. The monitoring system comprises the optical fiber vibrating sensor, an optical fiber composite overhead ground wire, a wave-length adjusting device and a host machine which are connected in sequence. The sensor and the monitoring system have the advantages of being high in measuring accuracy, high in speed, good in frequency response, stable in long-term performance and the like, the problem that the prior art susceptible to influence of complicated electromagnetic environment, measuring accuracy, poor flexible, large size and poor system stability, cannot achieve field information transfer in real time and the like is solved, and the stability and reliability of the system are improved.

The invention discloses organic modified cement based patch mortar. The organic modified cement based patch mortar is prepared from the following raw materials in parts by mass: 100-200 parts of rapid-hardened sulfo-aluminate cement, 20-50 parts of silicate cement, 20-50 parts of limestone flour, 5-30 parts of ultrafine mineral powder, 150-400 parts of nano attapulgite, 2-5 parts of expansion agent, 70-150 parts of cationic emulsified asphalt, 0.06-0.1 part of antifoamer, 0.6-2 parts of water reducing agent, 200-600 parts of sand and 100-150 parts of water. The patch mortar disclosed by the invention is high in mechanical properties, good in impermeability and low in whole mortar shrinkage and has good compatibility with a cement matrix, the raw materials are cheap and readily-available, and the cost is relatively low, so that the patch mortar is suitable for being popularized in large scale.

The invention relates to an elastic metal slider support, which comprises a lower embedded plate, a base, an upper embedded plate, a top plate and an elastic metal layer. The lower embedded plate is disposed at the bottom, the base is fixed on the upper surface of the lower embedded plate through bolts, a stainless steel plate is welded on the base, the upper embedded plate is disposed at the top, the top plate is fixed on the lower surface of the upper embedded plate through bolts, the bottom of the top plate is provided with a recess, the elastic metal layer is inserted in the recess and disposed on the base, the elastic metal layer is composed of a metal spring pad and a polytetrafluoroethylene plastic layer, the stainless steel plate and the metal elastic layer form a friction pair, and accordingly the requirement that a superstructure of the elastic metal slider support slides relative to an understructure of the elastic metal slider support in case of an earthquake or big wind. Compared with the prior art, the elastic metal slider support has the advantages of high vertical bearing capacity, high temperature resistance, long-term stable performance and the like.