42 results about "Reinforcement corrosion" patented technology

The invention relates to the technical field of reinforcement corrosion detection, in particular to a reinforcement corrosion nondestructive testing method integrating ultrasonic and electrochemical signals, and the method comprises the following steps: calculating an environmental interference coefficient and an environmental influence evaluation value through an environmental noise signal and concrete surface impedance, and constructing an initial evaluation model; collecting and processing ultrasonic and electrochemical signals in real time to obtain characteristic parameters, and calculating an initial corrosion risk coefficient through an initial evaluation model; generating a comprehensive decision coefficient in combination with the environmental influence evaluation value, determining a feature weight distribution strategy, and generating a fusion diagnosis index; adaptively adjusting the detection point grid spacing according to the fusion diagnosis index; the diagnosis reliability is verified through the time-space consistency coefficient of the ultrasonic waves and the electrochemical active region, and a fusion diagnosis deviation value is calculated; and carrying out collaborative optimization on the detection period and the evaluation model based on the cumulative fusion diagnosis deviation value. According to the invention, the problem that a single detection means is insufficient in precision and cannot be adaptively adjusted in a complex environment is solved.

The application discloses a kind of marine reinforced concrete crack fast self-repairing agent and preparation method thereof, the self-repairing agent includes the following components by mass fraction: polyacrylic acid hydrogel 20-30%, microorganism 5-10%, betaine 20-30%, calcium salt 15-25%, aluminum salt 20-30%.Its preparation method is: acrylic acid monomer is mixed with crosslinking agent, initiator, auxiliary crosslinking agent;Aluminum salt, acrylic acid are mixed to obtain aluminum acrylate;The two are mixed with microorganism and betaine, stirring and heating, and microorganism-polyacrylic acid hydrogel is prepared;After drying, it is broken, and calcium salt powder is wrapped, then immersed in polymer emulsion, dried, and prepared.The application can quickly block cracks by forming organic-inorganic composite repair products, solidify harmful media, release beneficial ions, achieve the dual goal of crack self-repairing and reinforcement corrosion inhibition.

The invention discloses an annular concrete electric pole nondestructive testing method, system and device and a storage medium, and relates to the technical field of annular concrete electric pole detection.The method comprises the steps that structural performance detection parameters of an annular concrete electric pole are measured; based on the structural performance detection parameters, combining historical data to set maintenance conditions; based on the structural performance detection parameters, establishing an electric pole health condition identification model, and performing nondestructive detection on the to-be-detected annular concrete electric pole in combination with maintenance conditions; accurate judgment on the strength of the annular concrete pole and the corrosion state of the steel bars is achieved, potential safety hazards are found in time, stable operation of a power system is guaranteed, meanwhile, industry detection standardization is promoted, and the method can be popularized and applied to the fields of power grids, power generation enterprises, new energy and the like and client-side power distribution network concrete poles.

A concrete structure reinforcement corrosion detection method based on a random forest algorithm and microwave scattering parameters comprises the following steps: building a microwave detection platform, and carrying out fixed frequency sweep detection on a reinforced concrete structure to obtain S parameter data with reinforcement corrosion condition information; dividing the S parameter data into a training set and a test set; extracting frequency and S parameter data of the reinforcing steel bars under different corrosion degrees, and training the random forest algorithm model by taking the frequency and S parameter data as input features and the reinforcing steel bar corrosion depth as output features; and performing microwave detection on the reinforced concrete structure, and inputting the obtained frequency and S parameter data into the trained random forest algorithm model to obtain the corrosion depth of the reinforcing steel bar. According to the concrete structure reinforcement corrosion detection method based on the random forest algorithm and the microwave scattering parameters, prediction of the reinforcement corrosion depth is achieved, and the method has the advantage of being high in accuracy.

This invention provides an ultra-high ductility cement-based composite material for marine engineering and its preparation method. The ultra-high ductility cement-based composite material comprises, by weight, the following raw materials: 250-500 parts cement clinker, 400-600 parts fly ash, 200-300 parts mineral powder, 100-150 parts silica fume, 160-240 parts metakaolin, 600-900 parts quartz sand, 10-20 parts organic synthetic fiber, 20-30 parts organic rust inhibitor, 180-240 parts water, and 1-8 parts water-reducing agent. The organic rust inhibitor provided by this invention can inhibit steel corrosion and chloride ion intrusion into concrete through the dual effects of binding chloride ions and forming a passivation film, thereby improving concrete durability. By controlling the mix proportions of the four mineral admixtures and the dosage of the synthetic fiber component, the concrete can better balance high strength, high ductility, high durability, high flowability, and excellent resistance to deformation.

The utility model discloses a nondestructive testing device for corrosion of a reinforced concrete structure in the technical field of steel bar corrosion detection. During detection, a first motor controls a supporting table to rotate and cooperates with a first lead screw nut to control an adjusting device and a detection device to move upwards, then a second motor is started, a rotating rod drives a gear to rotate, under the action of a toothed bar, the detection device is driven to move rightwards, and then the front end, the rear end and the upper end of a reinforcing steel bar are detected conveniently; then, a gear is matched with a toothed bar to control the detection device to move leftwards for resetting, a handle is pulled rightwards to enable a clamping block to be separated from a groove cavity of a clamping groove, a fixed block is rotated by 180 degrees, and when the handle is loosened, the clamping block is clamped into the groove cavity of the clamping groove, so that a second rectangular waveguide is located above, and a reinforcing steel bar is detected from the lower portion of a reinforced concrete block; and a third motor is started, so that a second reciprocating lead screw is matched with a second lead screw nut to drive a cross rod and a scanning assembly to move rightwards, and a second rectangular waveguide synchronously and gradually moves rightwards, so that the steel bars are detected conveniently.

The utility model belongs to the technical field of steel bar detection, especially relate to a reinforced concrete structure corrosion remote detection device, including steel bar rust quantitative detector, steel bar rust quantitative detector top end is equipped with support frame, steel bar rust quantitative detector both sides are equipped with X -ray emitter and X -ray detector respectively, support frame middle part is equipped with mounting seat. Through installing X -ray emitter and X -ray detector on steel bar rust quantitative detector, can let the X -ray emitter on steel bar rust quantitative detector emit X -ray, let X -ray shoot to the steel bar surface in the concrete, again through X -ray detector capture the ray of steel bar penetration, and form visual image on the display, again through signal antenna will image emit to remote control center, thereby can fast the steel bar corrosion in reinforced concrete is carried out effective remote detection, need not manual detection of artificial, improved the accuracy and convenience of device detection time.

The application relates to the technical field of civil engineering structure health monitoring, and discloses a reinforcing steel bar corrosion quantitative monitoring method based on an electromagnetic field and a probe type monitoring device, wherein the electromagnetic field is generated by a first probe and a second probe in the probe type monitoring device, and the first probe and the second probe are arranged on the two sides of a target position of a reinforcing steel bar to be measured; the method comprises the following steps: detecting the current magnetic field intensity on the two sides of the target position through the first probe and the second probe, and determining the magnetic field intensity change rate of the current magnetic field intensity relative to a preset reference magnetic field intensity; based on the reinforcing steel bar spacing between the reinforcing steel bar to be measured and an interfering reinforcing steel bar, a sensitivity correction coefficient is determined, and the theoretical sensitivity is corrected based on the sensitivity correction coefficient, wherein the theoretical sensitivity refers to the sensitivity of the magnetic field intensity change on the two sides of the target position to the reinforcing steel bar corrosion when the reinforcing steel bar is not interfered by the interfering reinforcing steel bar; and based on the magnetic field intensity change rate and the corrected sensitivity, the corrosion rate of the target position is determined. The application can achieve the technical effect of improving monitoring precision.

The application discloses a movable assembled construction sand purification device and system, and belongs to the field of construction sand purification. The sand cleaning equipment is integrated into movable modules according to different functions, and the modules are combined according to process requirements. When used, the modules can be combined, and part of the modules can be reused. Various functional devices are respectively integrated and installed in a box, the box can be transported to a use site by a transport tool, and can be used after unloading and hoisting. Different combination modes can be adopted according to different properties of sand, such as machine-made sand, sea sand or river sand, to form a purification system. The purification system can effectively remove the edges and corners of machine-made sand, needle-shaped sand and weathered layers on the surface of sand particles, effectively remove the chloride salt (chloride ion content can reach 0.000% to 0.002%) and other harmful substances of sea sand, reduce the sea sand into the state of river sand before entering the sea, and can be safely used like river sand, so that the reinforcement corrosion and the deterioration of concrete are avoided.

The present application relates to the technical field of nondestructive testing and evaluation of reinforced concrete structures, and discloses a method and system for detecting defects of reinforced concrete structures. The method ensures sufficient wetting by pretreating the concrete surface, identifies crack features using three-dimensional point cloud technology and adaptively adjusts the spacing between measurement points, and simultaneously performs potential gradient and linear polarization measurement to obtain internal data of the concrete. The system integrates environmental sensors to compensate for the effects of temperature and humidity in real time, uses a multi-source information fusion algorithm to comprehensively evaluate the degree of reinforcement corrosion, and divides the corrosion level. The system improves detection accuracy and adaptability, provides a reliable basis for structure maintenance, and effectively prolongs the service life of the structure.

The application discloses a kind of ocean reinforced concrete corrosion rate measuring system and method based on UWFBG, system includes optical fiber strain acquisition transmission module, optical fiber data processing analysis module, monitoring result real-time output module, marine environment simulation module, quantitative contrast determination module, corrosion electrode potential comparison monitoring module and the reinforced concrete with sensing optical fiber;Method is, the center wavelength drift of the UWFBG measuring point on the surface of reinforced concrete is obtained, and the surface net strain value is obtained;Establish steel-NaCl solution-carbon rod-direct current constant voltage power supply loop, record the mass loss rate of steel and corrosion electrode potential, establish the relationship curve of fiber measurement strain value-mass loss rate-corrosion electrode potential, according to the conversion of rust expansion strain and steel corrosion mass loss established, corrosion process is cross-validated by corrosion electrode potential change;Realize the corrosion rate measurement and verification of reinforced concrete structure in marine environment in real time, quantitatively, quasi-distributed.

The invention provides a reinforcing steel bar corrosion testing method, system and equipment, and relates to the field of reinforcing steel bar corrosion tests.According to the method, a testing body formed by testing assemblies corresponding to a to-be-tested reinforcing steel bar is utilized, long-term stable loading can be conducted on the to-be-tested reinforcing steel bar in a tension self-balance state, and therefore reinforcing steel bar corrosion testing in the loading state is achieved; the tension change value of the to-be-tested steel bar can be subjected to long-term statistics, and the steel bar corrosion testing precision is greatly improved.

The invention provides a steel bar corrosion immediate response corrosion inhibition system and a preparation method and application thereof, and belongs to the technical field of corrosion inhibitors. The preparation method disclosed by the invention comprises the following steps: mixing triethanolamine, polyphenols and 4-dimethyl pyridine, and then carrying out a reaction, so as to obtain anti-rust molecules; the preparation method comprises the following steps: mixing aniline, ethylbenzene, a lauryl sodium sulfate aqueous solution and rust-inhibiting molecules, and emulsifying to obtain a microemulsion; and mixing the microemulsion with a polyvinyl alcohol aqueous solution, and dropwise adding an ammonium persulfate aqueous solution to carry out polymerization reaction, thereby obtaining the steel bar corrosion immediate response corrosion inhibition system. The corrosion inhibition molecule (at) PANI corrosion inhibition system can immediately respond to steel bar corrosion, the steel bar corrosion rate can be remarkably controlled within 3 h after active corrosion of steel bars occurs, a stable protection layer is formed within 12 h, and generation of steel bar corrosion products is reduced.

This application provides a method, apparatus, and equipment for predicting corrosion current and rust in reinforced concrete under low-pressure environments, belonging to the field of engineering simulation modeling technology. The method includes: establishing a coupled transport model within the concrete considering oxygen concentration, sulfate ion diffusion behavior, and chloride ion diffusion behavior; establishing a model for predicting the corrosion current density and corrosion depth of the reinforcing steel, used to predict the charge number at different locations within the reinforcing steel, and calculating the corrosion depth and rust product content based on the corrosion current density; and establishing a linear elastic damage model, used to simulate the evolution of concrete damage caused by steel corrosion based on the rust product content output by the steel corrosion current density prediction model, thereby achieving accurate prediction of rust and damage. This method considers changes in oxygen concentration under low pressure, and by describing oxygen diffusion, incorporates the output of the transport model as a dynamic variable into the corrosion current calculation process, improving the accuracy of corrosion current and steel corrosion prediction.

This application discloses a data augmentation method, device, storage medium, and computer program product, relating to the field of bridge performance prediction technology. The method includes: obtaining the spatial distribution of steel reinforcement corrosion rate; determining the standard deviation of the steel reinforcement corrosion rate based on the spatial distribution; and determining the logarithmic function relationship between the standard deviation and the average corrosion rate of the steel reinforcement through a fitting method; simulating the spatial distribution of the steel reinforcement corrosion rate using the Nataf transform method based on the standard deviation and the average corrosion rate to generate a steel reinforcement corrosion rate distribution that follows a logarithmic distribution, and inputting this distribution into a finite element model of a reinforced concrete beam to obtain the crack width distribution; iteratively executing the above steps until a termination condition is met, at which point the calculation ends and returns to establish the mapping relationship between the spatial distribution of steel reinforcement corrosion rate and the crack width distribution. This application can solve the problem that the data available for obtaining this sequence-sequence mapping relationship under existing laboratory conditions is very limited.

The invention relates to the technical field of offshore photovoltaic, and provides an offshore photovoltaic pile foundation repairing effect monitoring method and system.The method comprises the steps that the rebar corrosion rate, the temperature and humidity of a concrete protection layer, pile top vibration and pile body strain of a repaired offshore photovoltaic pile foundation are obtained; on the basis of the temperature and humidity of the concrete protective layer, after the obtained reinforcement corrosion rate is converted into the corrosion rate under the standard condition, the stirrup radius loss rate is calculated; establishing a three-dimensional model of the offshore photovoltaic pile foundation, introducing the radius loss rate of the stirrup into the three-dimensional model, performing simulation prediction on pile top vibration and pile body strain, and adjusting the size of the stirrup in the three-dimensional model by comparing with the obtained pile top vibration and pile body strain; and based on the adjusted three-dimensional model, the remaining life of the repaired offshore photovoltaic pile foundation is determined in combination with the obtained pile top vibration and pile body strain. And effective evaluation of the repair quality is realized.

To provide a method for evaluating reinforcing bar corrosion that can relatively easily confirm the repair effect of electrochemical treatment. A method for evaluating rebar corrosion involves measuring the natural potential before and after electrochemical treatment.

A data augmentation method includes: obtaining spatial distribution of reinforcing steel corrosion rate along a length direction, determining a standard deviation of the reinforcing steel corrosion rate based on the spatial distribution of reinforcing steel corrosion rate along the length direction, and determining a logarithmic functional relationship between the standard deviation of reinforcing steel corrosion rate and an average reinforcing steel corrosion rate through a fitting method; simulating the spatial distribution of reinforcing steel corrosion rate along the length direction using a Nataf transformation method to generate a distribution of reinforcing steel corrosion rate conforming to a logarithmic distribution, inputting the distribution of reinforcing steel corrosion rate into a finite element model of the reinforced concrete beam, and obtaining a crack width distribution corresponding to the distribution of reinforcing steel corrosion rate conforming to the logarithmic distribution; where the steps are repeatedly executed until a termination condition is met.

The utility model discloses a nondestructive testing device for the corrosion condition of a steel bar of a concrete tower. The nondestructive testing device comprises a main detection assembly and an auxiliary detection assembly, the main detection assembly comprises a main shell, a main walking unit, a magnetic excitation source, a Hall sensor and a fixing unit. The fixing unit comprises a first bandage, a second bandage and an air bag piece. The air bag part comprises an inflation element and a plurality of air bags arranged on the inner side faces of the first bandage and the second bandage, and the air bags communicate with the inflation element. The auxiliary detection assembly comprises an auxiliary shell, an auxiliary walking unit, a magnetic excitation source and a Hall sensor. The detection device is provided with the main detection assembly and the auxiliary detection assembly, and the main detection assembly and the auxiliary detection assembly cooperate with each other to detect the direction of the main reinforcement in the concrete tower.

This invention provides a device for monitoring the radial strain distribution of steel reinforcement corrosion expansion, belonging to the field of structural health monitoring technology. The device comprises a semi-annular stainless steel shell, a semi-annular stainless steel shell cover, a semi-annular stainless steel shell base, a fan-shaped hollow convex extrusion block, a single-mode optical fiber, a Fabry-Perot cavity, a protective soft sleeve, butterfly-shaped hand-tightened rubber-tipped screws, and rivets. This device is based on the principle of a multiplexed intrinsic Fabry-Perot interferometer and the change in the length of the Fabry-Perot cavity caused by steel reinforcement corrosion expansion. When the steel reinforcement corrodes and expands, the tensile strain of the Fabry-Perot cavity increases, and the increase is proportional to the magnitude of the radial strain caused by the steel reinforcement corrosion expansion. By monitoring the increase in the tensile strain of the Fabry-Perot cavity, real-time, quantitative, and non-destructive monitoring of the radial strain distribution of steel reinforcement corrosion expansion is achieved. This invention is simple to manufacture, has low economic cost, greatly reduces manual labor, and is easy to install, facilitating large-scale deployment.

This invention discloses an electrochemically active self-healing anti-rust grouting material for basement slab bottoms and its preparation method. By introducing silane-modified epoxy-acrylate self-healing microspheres and pH-potential dual-response activated nano-iron powder into a cement-fly ash-mineral powder ternary cementitious system, a functional synergistic system integrating filling support, electrochemical self-healing, and steel reinforcement corrosion protection is constructed. The self-healing microspheres in the system achieve precise triggering and permanent healing of cracks upon their appearance, while avoiding the problem of deactivation in strongly alkaline environments common in traditional self-healing systems. A long-term relay cathodic protection mechanism requiring no external power supply is established using gradient potential dual-stage sacrificial anodes combined with a three-dimensional conductive network. Furthermore, the three-dimensional conductive network of the material enhances the integrity of the electrochemical circuit. This invention achieves enhanced protection of the void area at the bottom of basement slabs throughout its entire life cycle, providing a stable and scalable material and process foundation for underground engineering structures in high-water-level, highly corrosive environments.

The invention relates to an arc-shaped expansion joint and a construction method thereof. The arc-shaped expansion joint comprises a first connecting plate and a second connecting plate, and matched and continuous arc curved surfaces are arranged on the opposite faces of the first connecting plate and the second connecting plate; mounting grooves are further formed in the top surfaces of the first connecting plate and the second connecting plate, a metal cover plate is arranged on the mounting grooves, auxiliary connecting pieces are arranged on the two sides of the metal cover plate respectively and are in sealed connection with the end surfaces of the first connecting plate and the second connecting plate, and a filling piece is further arranged at the bottom of the metal cover plate; the method is carried out based on the mode of combining rigid materials and flexible materials, the metal cover plates and the auxiliary connecting pieces can form a triple waterproof structure, and corrosion of steel bars and deterioration of concrete are avoided; the arc-shaped structure and the wavy elastic structure on the surface can be effectively matched, so that the structure can adapt to horizontal expansion, vertical settlement and corner deformation of the bridge at the same time, and stable operation of the bridge under complex working conditions is guaranteed.

The application discloses an atoll engineering alkali magnesium sulfate cement coral concrete and a preparation process thereof, and belongs to the technical field of building engineering materials. The concrete formula comprises, in parts by mass, cementing material 560-1085 parts, coral sand fine aggregate 380-1060 parts, coral coarse aggregate 163-454 parts, mixing water 186-307 parts and naphthalene-based high-efficiency water reducing agent 11-28 parts. The cementing material is made of light-burned magnesia, magnesium sulfate pentahydrate, additive and active mineral admixture. The active mineral admixture is a mixture of coral micro powder and granulated blast furnace slag micro powder or fly ash. The application has the advantages of effectively reducing construction cost and engineering period, fast hardening and early strength, good mechanical property, low steel corrosion rate, zero expansion and zero shrinkage, and low cracking probability.

The invention provides a post-cast strip protection fixing device and a construction method, the post-cast strip protection fixing device comprises a plurality of supporting structures, the multiple supporting structures are sequentially arranged in the first direction, and every two adjacent supporting structures are connected through a fixing structure; wherein the supporting structure comprises a supporting formwork and at least two supporting pieces arranged on the same side face of the supporting formwork, the multiple supporting pieces are sequentially arranged in the second direction, the fixing structure and the supporting pieces are arranged on the two opposite side faces of the supporting formwork respectively, and the first direction is perpendicular to the second direction. The post-cast strip protecting and fixing device has the beneficial effects that common post-cast strip protection is replaced by the post-cast strip protecting and fixing device, the problems of falling of construction waste, repeated displacement damage and treading deformation are effectively solved, the protecting effect is good, the problems of steel bar corrosion, waste accumulation and treading deformation can be well solved by adopting the post-cast strip protecting and fixing device in the post-cast strip retaining process, and the service life of the post-cast strip is prolonged. Construction is convenient, manufacturing cost is low, and maintenance cost in the using process is saved.

The application discloses cement-based capillary crystalline waterproofing agent and waterproof material, comprising: complexing agent, active silicon additive, waterproof additive and calcium ion compensator; wherein, the mass ratio of complexing agent, active silicon additive, waterproof additive and calcium ion compensator is 0.75-3:0.25-1:0.25-1:0.25-1. The waterproofing agent in the application has the characteristics of permanence, strong permeability, improving the density of concrete and preventing the corrosion of steel bars in concrete; specifically, the waterproofing agent in the application improves the number of insoluble crystals in concrete through the interaction between components, thereby improving the density of concrete, increasing the impermeability of concrete, and avoiding the corrosion of steel bars in concrete. In addition, the complexing agent in the application does not cause consumption to itself when carrying Ca 2+ Therefore, the waterproofing agent in the application has permanence.

This invention discloses a material and method for repairing salt-frost damage to concrete bridge railings, belonging to the field of civil engineering materials technology. The raw materials include: 30-34 parts composite cement, 16-20 parts mineral admixtures, 38-40 parts quartz sand, 1-3 parts nano-reinforcing agent, 1-3 parts steel reinforcement corrosion inhibitor, 2-4 parts expansion agent, 1-3 parts self-healing component, 2-4 parts polymer powder, 1-3 parts fiber, 5-7 parts solid functional repair component, and 14-17 parts water; wherein the solid functional repair component includes: powder water-reducing agent, powder water-retaining agent, powder antifreeze agent, and powder retarder. Through precise multi-component proportioning, the overall mechanical properties and impermeability are improved, salt-frost resistance is enhanced, crack propagation is prevented, the long-term integrity of the repair layer is ensured, steel corrosion is prevented, and on-site operation is adapted.

This invention provides a wireless electromagnetic induction probe device for detecting steel bar corrosion, belonging to the field of steel bar corrosion detection technology. The device includes a base, a bracket fixedly connected to the top of the base, a T-shaped movable seat inside the bracket, and a mounting hole inside the T-shaped movable seat. A second motor is fixedly installed inside the mounting hole, and a rotating shaft is fixedly connected to the drive shaft of the second motor. One end of the rotating shaft is welded to the end side of a fixed frame. A third motor is fixedly connected inside the fixed frame, and a one-way lead screw is welded to the drive shaft of the third motor. This invention, by operating three sets of motors, allows the wireless electromagnetic induction detector to expand its movement range, thereby further expanding the detection range on the wall surface. This eliminates the need for frequent movement of the entire device, reduces operational procedures, and improves detection efficiency.

The utility model relates to an inter-beam supporting plate reinforcement structure, which belongs to the technical field of civil construction and comprises two beam bodies, two main reinforcements which are symmetrically distributed up and down are fixed at the top between opposite sides of the two beam bodies, and two ends of each main reinforcement penetrate through the beam bodies and extend to inner cavities of the beam bodies. A plurality of distribution ribs are arranged at the left and right ends of the opposite sides of the main ribs on the upper and lower sides; fine net-shaped steel bars are fixed between the opposite sides of the main bars and the distribution bars. According to the reinforcing bar structure of the inter-beam supporting plate, the structural strength and rigidity of the inter-beam supporting plate are improved, the stable performance can be kept under the condition of bearing a large load, the construction process is simplified, the construction difficulty and cost are reduced, the reinforcing bar structure is suitable for large-scale application and popularization, meanwhile, the anti-seismic property of the inter-beam supporting plate is enhanced, and the service life of the inter-beam supporting plate is prolonged. Good stability and safety can still be kept under extreme conditions such as earthquakes, good protection can be provided by the anti-corrosion coating, and the risk of steel bar corrosion is reduced.

The invention belongs to the technical field of image processing, and discloses a reinforced concrete corrosion crack image and physical parameter fusion corrosion rate prediction method and system based on a small sample, and the method comprises the steps: obtaining a concrete surface corrosion crack image, internal steel bar arrangement parameters and external environment physical information; performing feature extraction and compression on the image to obtain a one-dimensional feature vector of the image; internal steel bar arrangement parameters and external environment physical information are fused into one-dimensional feature vectors of the images; based on the fusion feature vector, establishing a mapping relation among the crack image features, the internal reinforcement arrangement parameters and the reinforcement corrosion rate by using a nonlinear mapping method; based on the mapping relation, training a reinforcement corrosion rate prediction model by using a supervised learning mode; inputting a to-be-detected reinforced concrete corrosion crack image into the trained model to obtain the corrosion rate of the steel bars in the region; the corrosion rate prediction accuracy of the small sample image training scene is improved.

This invention relates to the field of concrete durability testing technology, specifically to a concrete life analysis system and method for saline environments. The system includes: an environmental simulation module configured to perform immersion-drying cycles on concrete specimens and create a corrosive environment; a parameter acquisition module used to detect the relative dynamic elastic modulus and pore size distribution data of the concrete under load; a concentration analysis module configured to calculate the chloride ion concentration on the concrete surface based on the diffusion law; and a life prediction module used to generate life analysis results based on the effective thickness of the protective layer and the critical value of steel reinforcement corrosion. This invention solves the problem of traditional methods' difficulty in accurately simulating the high-concentration corrosive ion environment of saline soil by constructing a comprehensive analysis model that includes immersion-drying cycles and chloride ion diffusion. It effectively integrates the influence of load, temperature, and carbonation factors on concrete, achieving a precise quantitative assessment of the durability of the outer concrete layer of PCCP pipes under specific saline environments.