Reinforced concrete dynamic protection system with damage self-sensing and active corrosion prevention functions

Abstract

A reinforced concrete dynamic protection system with damage self-sensing and active corrosion prevention functions comprises a steel reinforcement framework, conductive self-sensing concrete, a stainless steel electrode, a solar power source and a monitoring control system. Conductive self-sensing concrete is poured around a steel reinforcement framework to serve as a conductive path and crack monitoring, and a stainless steel electrode is embedded in the surface layer of the self-sensing concrete and connected with a solar power source anode to form a cathode protection system loop. And the monitoring control system analyzes the electric signal in the system loop and controls the frequency and voltage of the pulse current. The method has the functions of monitoring damage and cracking of a concrete protective layer and inhibiting corrosion of steel bars, and long-life safe service of components is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of corrosion protection of steel bars in reinforced concrete structures, and particularly relates to a cracking perception protection system based on self-sensing concrete. Background Art

[0002] Existing technologies such as the one with the publication number CN202410577461, "A Corrosion Protection System with Both Passive Resistance and Active Control and Its Construction Method", have the problem of protection lag, with a response delay > 2 minutes. In high-dynamic corrosion environments such as the ocean, chloride ion penetration or steel bar de-passivation may rapidly trigger rusting, and the system response delay exceeds 2 minutes, resulting in the failure of protection measures to take effect in a timely manner, significantly increasing the risk of early damage to the structure. Moreover, there is a lack of a dynamic threshold judgment mechanism. The system relies on fixed thresholds to trigger protection (such as preset potential or current values) and cannot dynamically adjust the protection strategy according to variables such as concrete age, environmental temperature and humidity, and chloride ion diffusion rate. Although CN115449801A, "An External Current Cathodic Protection System for Reinforced Concrete", can monitor and predict the rusting time, it relies on the fixed ratio and complex parameter calibration of pre-embedded sensors. The sensors need to be strictly matched with parameters such as the concrete cover thickness and chloride ion diffusion coefficient. In actual projects, due to fluctuations in concrete mix ratio, construction quality differences, or environmental load changes, the monitoring data of the sensors deviate. There are still problems of insufficient adaptability and high maintenance costs in marine environments or diverse projects. The system needs to regularly calibrate the parameters of the sensors and the chloride ion diffusion model. In offshore platforms or deep-sea structures far from the mainland, the cost of manual calibration is high and it is difficult to achieve real-time performance. For example, although CN116445920A, "A Reinforced Concrete Cathodic Protection System and Its Protection Method", reduces the maintenance requirements by combining sacrificial anodes and external currents, it relies on pre-embedded cable grooves and fixed anode layouts. The cable grooves need to be pre-embedded before concrete pouring, with high construction precision requirements, and the positioning deviation of the cable grooves and anode holes easily leads to uneven current distribution. The dissolution rate of sacrificial anodes (such as zinc alloys) increases in seawater immersion or splash zones and needs to be replaced frequently; if the auxiliary anode (such as MMO titanium tape) of the external current system is not fully compacted with the conductive mortar, the anode-electrolyte interface is likely to fail due to concrete shrinkage cracks. There are still problems of cumbersome installation and limited adaptability in complex marine environments.

[0003] In the prior art, such as the patent with publication number CN116445920A, "A High-Toughness Conductive Composite Anode Material for Cathodic Protection of Reinforced Concrete Structures and Its Preparation Method", although the conductivity is enhanced by carbon fibers, it still relies on fixed ratios and complex dispersion processes. The material components need to be strictly prepared according to the preset ratios. In actual engineering, due to differences in concrete strength grades, aggregate particle sizes, or fluctuations in environmental temperature and humidity, the carbon fibers need to be pre-dispersed using sodium carboxymethyl cellulose dispersant, involving multi-step stirring and impregnating glue penetration processes, which take up to 2 - 3 hours. This process has extremely high requirements for the cleanliness of the construction environment. If there is dust pollution or temperature control deviation on-site, it is easy to cause fiber agglomeration or uneven curing of the colloid, seriously affecting the uniformity of the protection current, resulting in insufficient stability of the conductive network, being difficult to balance the sensing accuracy and dynamic response ability, and the material design focuses on optimizing the static conductive performance, lacking a sensing and feedback mechanism for dynamic variables such as chloride ion penetration rate and steel bar potential drift. CN117024070A, "A Chloride Ion Penetration Rate-Sensing Self-Sensing Concrete and Its Preparation Method", only achieves a one-way monitoring function and can only reflect chloride ion accumulation or microcrack propagation through changes in resistivity (such as a threshold ≥ 15%), unable to trigger protection measures by linking with the control module, unable to form a closed-loop control link, not integrating a threshold adaptive algorithm and an actuator interface, the output of the protection current needs to be preset in advance and cannot be dynamically adjusted according to the real-time potential, and it is highly sensitive to environmental interference. The conductive network of the self-sensing concrete is easily affected by temperature, humidity, and carbonation depth. CN115370066A, "Impact-Resistant Reinforcement Structure of Concrete Components with Self-Sensing Function and Manufacturing Method", although damage monitoring is achieved through optical fiber wires, it relies on an external optical fiber protection layer and a complex anchoring and installation process. The optical fiber wires need to be wrapped and protected by LRS-FRP strain strips, but the interface between the FRP and the concrete is prone to peeling under impact loads, resulting in the exposure and breakage of the optical fibers. There are problems such as complex construction, the need to pre-drill Φ10mm × 60mm holes to install anchor fittings (spacing 20 - 50 cm), and precisely align the connection holes (error < 1mm), resulting in low construction efficiency.

[0004] In summary, the current reinforced concrete corrosion protection technology has three main problems: (1) Response hysteresis and insufficient dynamic control capabilities. It is impossible to dynamically adjust the strategy according to variables such as concrete age, ambient temperature and humidity, and chloride ion diffusion rate, resulting in delayed protection in highly dynamic environments such as the ocean, significantly increasing the risk of early structural damage; (2) Poor adaptability and high maintenance cost: The technology relies on pre-buried sensors, cable troughs or fixed ratio materials. In actual projects, fluctuations in concrete mix ratios, construction errors or environmental interference lead to monitoring data deviations and uneven current distribution, resulting in high maintenance costs; (3) Complex construction and single functional defects: Existing solutions require pre-buried cable troughs, anchors or complex dispersion processes, resulting in low construction efficiency and easy failure due to interface peeling. At the same time, most technologies only achieve one-way monitoring or static protection, lack closed-loop control links, and cannot adjust pulse current in a coordinated manner to cope with dynamic corrosion environments. Summary of the Invention

[0005] In order to overcome the shortcomings of existing intelligent concrete monitoring, which has a single function and a load adaptation range limited by the elastic limit of the matrix, the present invention provides a reinforced concrete dynamic protection system with both damage self-sensing and active anti-corrosion; by composite-doping copper nanofibers, sodium polystyrene sulfonate dispersant and titanate coupling agent, combined with gridded stainless steel electrodes and solar pulsed DC control technology, it realizes the integration of multi-parameter self-sensing and dynamic protection, anti-environmental interference design, dynamic threshold control and pulse protection mechanism, damage threshold adaptation, pulsed DC protection, crack resistance and construction adaptability optimization, fiber synergistic reinforcement innovation, breaking through the technical bottlenecks of traditional technology with single monitoring function, response hysteresis and complex construction, and providing a full life cycle intelligent protection solution for reinforced concrete structures in harsh environments such as high salt fog and dry-wet alternation.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A dynamic reinforced concrete protection system with both damage self-sensing and active corrosion protection includes a steel skeleton, conductive self-sensing concrete, stainless steel electrodes, a solar power source, and a monitoring and control system. The steel skeleton serves as the load-bearing body and cathode of the concrete structure. The conductive self-sensing concrete, which wraps the steel skeleton, is composed of a cement-based material, copper nanofibers, and a sodium polystyrene sulfonate dispersant. The stainless steel electrodes are distributed in a grid pattern and are fixedly connected to the conductive self-sensing concrete.

[0008] The steel frame is connected to the negative pole of the solar power source, and conductive self-sensing concrete is poured around the steel frame as a conductive path and crack monitoring. The stainless steel electrode is buried in the surface of the self-sensing concrete and connected to the anode of the solar power source to form a cathodic protection system loop. The monitoring and control system analyzes the electrical signals in the system loop and controls the frequency and voltage of the pulse current.

[0009] Furthermore, the grid spacing of the stainless-steel electrode is 20-50 cm, and the electrode is fixed to the conductive self-sensing concrete through an epoxy resin bonding layer.

[0010] Furthermore, the damage threshold of the monitoring and control system is dynamically adjusted according to the concrete age. When the age ≤ 7 days, the threshold is set as the resistivity mutation amount ≥ 15%; when the age > 7 days, the threshold is set as the resistivity mutation amount ≥ 20%.

[0011] Preferably, the solar power supply includes a photovoltaic panel, a storage battery, and a voltage regulator, with an output voltage range of 1.5-5V and a current density of 10-50 mA / m 2 。

[0012] In the cathodic protection system circuit, the application mode of the cathodic protection voltage is pulsed direct current, with a pulse frequency of 1-10 Hz and a duty cycle of 20%-50%.

[0013] In the conductive self-sensing concrete, the mass percentage formula of the components is as follows:

[0014] Cement-based material: 95.2%-99.35%;

[0015] Copper nanofibers: 0.5%-3%;

[0016] Sodium polystyrene sulfonate dispersant: 0.1%-1.5%.

[0017] The component mass percentage of the cement-based material is: 45%-55% of 52.5 ordinary Portland cement, 5%-12% of silica fume, 35%-45% of quartz sand, and the particle size distribution of the quartz sand is 20-100 mesh.

[0018] The diameter of the copper nanofibers is 50-200 nm, the length is 1-5 μm, and they are uniformly dispersed by the sodium polystyrene sulfonate dispersant. The surface is coated with a silica insulation layer, the thickness of the silica insulation layer is 10-50 nm, and the breakdown field strength ≥ 20 kV / mm.

[0019] Preferably, 0.05%-0.3% by mass of titanate coupling agent is incorporated into the conductive self-sensing concrete to enhance the interfacial bonding force and conductive performance between the copper nanofibers and the cement matrix.

[0020] The technical concept of the present invention is as follows: Through the design of a copper nanofiber conductive network, the concrete of the present invention has: High conductivity and stability: Copper nanofibers (with a diameter of 50 - 200 nm and a length of 1 - 5 μm) are synthesized by electrochemical deposition method, and the surface is coated with a silica insulating layer (with a thickness of 10 - 50 nm and a breakdown field strength ≥ 20 kV / mm), forming a three-dimensional conductive network in the concrete matrix. The silica layer effectively isolates the oxidation corrosion of copper fibers by the alkaline environment of the concrete, ensuring long-term conductive stability (resistivity drift within 28 days < 3%). Dispersion and interface optimization: Sodium polystyrene sulfonate dispersant (mass ratio 0.1% - 1.5%) combined with titanate coupling agent (mass ratio 0.05% - 0.3%) realizes uniform dispersion of fibers and enhances the fiber-matrix interfacial bonding force, with the compressive strength loss rate ≤ 5%, while improving the continuity of the conductive network during the propagation of microcracks (resistivity fluctuation < 5% when the crack width < 0.3 mm).

[0021] Through the dynamic anti-corrosion regulation mechanism, the system has: Intelligent threshold response: The monitoring system dynamically adjusts the damage threshold according to the concrete age (age ≤ 7 days: resistivity mutation amount ≥ 15%; age > 7 days: ≥ 20%), real-time collects resistivity, temperature, and humidity data, and accurately determines the damage level. Pulse direct current protection: A solar power source (output voltage 1.5 - 5 V, current density 10 - 50 mA / m 2 ) applies a pulsed voltage (frequency 1 - 10 Hz, duty cycle 20% - 50%) through a grid-shaped stainless steel electrode (spacing 20 - 50 cm), adjusts the cathodic protection potential to -720 - -1100 mV (vs Ag / AgCl), inhibits chloride ion penetration and repairs the passive film, and the protection efficiency is increased by more than 40%.

[0022] Through the synergistic effect of materials and the system, the system has: Optimized electrode layout: Stainless steel electrodes (size 35 mm × 60 mm, mesh number 4 - 8 mesh) are fixed on the concrete surface through an epoxy resin bonding layer, allowing a construction spacing error of ±5 cm, adapting to curved and irregular structures, and ensuring the uniformity of current distribution. Environmental adaptability: The system works stably in the temperature range of -20°C to 80°C and under dry to saturated water humidity conditions, with a resistivity sensitivity of ±0.5% and a humidity monitoring error < 3%.

[0023] Through material innovation and system integration, the present invention solves the problems of single function, response lag, and complex construction of traditional smart concrete, and provides a full-life-cycle, high-reliability protection solution for reinforced concrete structures under harsh working conditions such as marine environments and bridges.

[0024] The beneficial effects of the present invention are mainly manifested in:

[0025] (1) Resistivity sensitivity: The damage threshold is dynamically adjusted according to the age (age ≤ 7 days: ≥ 15%; age > 7 days: ≥ 20%);

[0026] (2) Environmental adaptability: At low temperature of -20°C or high temperature of 80°C, the resistivity fluctuation < 8%, and the humidity monitoring error < 3%.

[0027] (3) Damage resistance and durability: The copper nanofiber insulation layer resists corrosion in alkaline environment, and the conductivity stability for 28 days (resistivity drift < 3%);

[0028] (4) The titanate coupling agent enhances the interfacial bonding, the compressive strength loss rate ≤ 5%, and the ultimate tensile strain reaches 0.5%. Detailed implementation mode

[0029] The present invention will be further described below.

[0030] A reinforced concrete dynamic protection system with both self-sensing of damage and active anti-corrosion includes a steel bar skeleton, electrically conductive self-sensing concrete, stainless steel electrodes, a solar power source, and a monitoring and control system. The steel bar skeleton serves as the stress-bearing main body and cathode of the concrete structure. The electrically conductive self-sensing concrete is used to wrap the steel bar skeleton and is composed of a cement-based material, copper nanofibers, and a sodium polystyrene sulfonate dispersant. The stainless steel electrodes are distributed in a grid pattern, and there is a fixed connection between the stainless steel electrodes and the electrically conductive self-sensing concrete;

[0031] The steel bar skeleton is connected to the negative pole of the solar power source. The electrically conductive self-sensing concrete is poured around the steel bar skeleton as an electrically conductive path and for crack monitoring. The stainless steel electrodes are buried on the surface of the self-sensing concrete and are connected to the positive pole of the solar power source to form a cathodic protection system loop. The monitoring and control system analyzes the electrical signals in the system loop and controls the frequency and voltage of the pulsed current.

[0032] Further, the grid spacing of the stainless steel electrodes is 20 - 50 cm, and the electrodes and the electrically conductive self-sensing concrete are fixed through an epoxy resin bonding layer.

[0033] Furthermore, the damage threshold of the monitoring and control system is dynamically adjusted according to the age of the concrete. When the age ≤ 7 days, the threshold is set as the resistivity mutation amount ≥ 15%; when the age > 7 days, the threshold is set as the resistivity mutation amount ≥ 20%.

[0034] Preferably, the solar power source includes a photovoltaic panel, a storage battery, and a voltage regulator, and the output voltage range is 1.5 - 5V, and the current density is 10 - 50 mA / m 2 .

[0035] In the circuit of the cathodic protection system, the cathodic protection voltage is applied in the form of pulsed direct current, with a pulse frequency of 1 - 10 Hz and a duty cycle of 20% - 50%.

[0036] In the electrically conductive self - sensing concrete, the mass percentage formula of the components is as follows:

[0037] Cement - based material: 95.2% - 99.35%;

[0038] Copper nanofibers: 0.5% - 3%;

[0039] Sodium polystyrene sulfonate dispersant: 0.1% - 1.5%;

[0040] Among them, the mass percentage of the components of the cement - based material is: 45% - 55% of 52.5 ordinary Portland cement, 5% - 12% of silica fume, 35% - 45% of quartz sand, and the particle size distribution of the quartz sand is 20 - 100 mesh.

[0041] The diameter of the copper nanofibers is 50 - 200 nm, the length is 1 - 5 μm, and they are uniformly dispersed by the sodium polystyrene sulfonate dispersant. The surface is coated with a silica insulation layer, and the thickness of the silica insulation layer is 10 - 50 nm, and the breakdown field strength ≥ 20 kV / mm.

[0042] Preferably, 0.05% - 0.3% by mass of titanate coupling agent is incorporated into the electrically conductive self - sensing concrete to enhance the interfacial bonding force and electrical conductivity between the copper nanofibers and the cement matrix.

[0043] The cracking - sensing protection system based on self - sensing concrete in this embodiment includes:

[0044] Electrically conductive self - sensing concrete:

[0045] Matrix material: 52.5 ordinary Portland cement (45% - 55%), silica fume (5% - 12%), quartz sand (35% - 45%, particle size distribution 20 - 100 mesh);

[0046] Functional phase:

[0047] Copper nanofibers: diameter 50 - 200 nm, length 1 - 5 μm, uniformly dispersed by sodium polystyrene sulfonate dispersant (0.1% - 1.5%), surface coated with silica insulation layer (thickness 10 - 50 nm, breakdown field strength ≥ 20 kV / mm);

[0048] Titanate coupling agent: dosage 0.05% - 0.3%, improving the fiber - matrix interfacial bonding force, and the 28 - day compressive strength loss rate ≤ 5%.

[0049] Dynamic protection system:

[0050] Electrode layout: The grid-shaped stainless-steel electrodes (spacing 20 - 50 cm, size 35 mm × 60 mm, mesh number 4 - 8 mesh) are fixed on the concrete surface through an epoxy resin bonding layer to form a uniform current distribution;

[0051] Solar energy regulation module: The photovoltaic panel outputs pulsed direct current (voltage 1.5 - 5 V, current density 10 - 50 mA / m 2 ), frequency 1 - 10 Hz, duty cycle 20% - 50%, and adjusts the cathode potential to -720 - -1100 mV (vs Ag / AgCl) in real time.

[0052] The preparation process of the cracking perception and protection system based on self-sensing concrete in this embodiment includes:

[0053] Copper nanofiber pretreatment: Mix a copper salt solution (0.1 - 0.5 mol / L) with an ascorbic acid reducing agent, synthesize fibers by electrochemical deposition method, and then impregnate with silica sol and cure at high temperature;

[0054] Concrete mixing and construction:

[0055] Dry material mixing: Cement, silica fume, quartz sand and water reducer (0.02% - 0.03%) are stirred at low speed for 3 - 5 minutes;

[0056] Slurry preparation: Sequentially add the copper nanofiber dispersion liquid and titanate coupling agent, and stir at high speed (8000 - 12000 r / min, 5 - 8 minutes) until uniform;

[0057] Pouring and molding: The mixture is poured into the mold, the electrodes are inserted and vibrated for 20 - 40 seconds, and cured under standard conditions for 28 days.

[0058] The solution of this embodiment breaks through the single-function limitation of traditional technologies, realizes real-time electrical signal feedback of load / damage through conductive self-sensing concrete (cement-based + nano conductive fiber + conductive polymer dispersant), and at the same time constructs an in-situ electrochemical system with steel bars as the cathode and self-sensing concrete as the anode to form a "perception - judgment - response" closed loop, and deeply integrates structural health monitoring and active anti-corrosion technologies for the first time.

[0059] Synergistic effect of high-performance materials: The compound use of nano conductive fibers and conductive polymer dispersants significantly improves the stability of the concrete conductive network: The nano fibers construct a three-dimensional conductive skeleton to enhance the mechanical - electrical coupling sensitivity, and the conductive polymer optimizes the interfacial charge transfer efficiency, making the accuracy of the damage perception threshold increase by more than 80%, and at the same time reducing the resistivity fluctuation of the material.

[0060] Solar-powered intelligent protection: It adopts the linkage between a solar power supply and a monitoring and control system, triggering active anti-corrosion only when the concrete damage exceeds a preset threshold, saving more than 70% energy compared with traditional constant potential cathodic protection. The system has an adaptive adjustment ability, which can dynamically optimize the output current according to the crack width of concrete cracking, and extend the service life of the steel structure.

[0061] Full life cycle cost optimization: Early damage warning can reduce the structural repair cost by more than 60%. The active anti-corrosion system reduces the steel corrosion rate by 90%, significantly extending the service life of the structure. The built-in electrode design avoids the installation and maintenance costs of external auxiliary electrodes, and the modular design of the whole system facilitates the transformation and upgrading of existing structures.

[0062] The solution of this embodiment introduces a dynamic threshold adaptive algorithm, a self-sensing concrete integrated design (constructing a conductive network with copper nanofibers + titanate coupling agent) and a modular electrode layout, abandoning the limitations of embedded sensors and fixed ratios, and combining solar pulse direct current regulation (1.5 - 5V, 10 - 50mA / m 2 ), achieving millisecond-level response, full life cycle protection and adaptability to complex environments, and breaking through the technical bottlenecks of traditional technologies such as response lag, cumbersome construction and single function.

[0063] The content described in the embodiments of this specification is only a list of the implementation forms of the inventive concept and is only for illustrative purposes. The protection scope of the present invention should not be regarded as limited to the specific forms stated in this embodiment, and the protection scope of the present invention also extends to equivalent technical means that can be conceived by those of ordinary skill in the art based on the inventive concept of the present invention.

Claims

1. A reinforced concrete dynamic protection system with both self-sensing of damage and active anti-corrosion, characterized in that The system includes a steel bar skeleton, conductive self-sensing concrete, stainless steel electrodes, a solar power source, and a monitoring and control system. The steel bar skeleton serves as the load-bearing body and cathode of the concrete structure. The conductive self-sensing concrete is used to wrap the steel bar skeleton and is composed of a cement-based material, copper nanofibers, and a sodium polystyrene sulfonate dispersant. The stainless steel electrodes are distributed in a grid pattern, and there is a fixed connection between the stainless steel electrodes and the conductive self-sensing concrete. The steel bar skeleton is connected to the negative pole of the solar power source. The conductive self-sensing concrete is poured around the steel bar skeleton to serve as a conductive path and for crack monitoring. The stainless steel electrodes are buried on the surface of the self-sensing concrete and are connected to the positive pole of the solar power source to form a cathodic protection system circuit. The monitoring and control system analyzes the electrical signals in the system circuit and controls the frequency and voltage of the pulsed current.

2. The reinforced concrete dynamic protection system with both self-sensing of damage and active anti-corrosion as claimed in claim 1, characterized in that The grid spacing of the stainless steel electrodes is 20 - 50 cm, and the electrodes are fixed to the conductive self-sensing concrete through an epoxy resin bonding layer.

3. The reinforced concrete dynamic protection system with both self-sensing of damage and active anti-corrosion as claimed in claim 1 or 2, characterized in that, The damage threshold of the monitoring and control system is dynamically adjusted according to the concrete age. When the age ≤ 7 days, the threshold is set as the resistivity mutation amount ≥ 15%; when the age > 7 days, the threshold is set as the resistivity mutation amount ≥ 20%.

4. The reinforced concrete dynamic protection system with both self-sensing of damage and active anti-corrosion as claimed in claim 1 or 2, characterized in that, The solar power supply includes a photovoltaic panel, a storage battery, and a voltage regulator, with an output voltage range of 1.5 to 5V and a current density of 10 to 50 mA / m 2 .

5. The reinforced concrete dynamic protection system with both self-sensing of damage and active anti-corrosion as claimed in claim 1 or 2, characterized in that, In the cathodic protection system circuit, the application method of the cathodic protection voltage is pulsed direct current, the pulse frequency is 1 - 10 Hz, and the duty cycle is 20% - 50%.

6. The reinforced concrete dynamic protection system with both self-sensing of damage and active anti-corrosion as claimed in claim 1 or 2, characterized in that, In the conductive self-sensing concrete, the mass percentage formula of the components is as follows: Cement-based material: 95.2% - 99.35%; Copper nanofibers: 0.5% - 3%; Sodium polystyrene sulfonate dispersant: 0.1% - 1.5%.

7. The reinforced concrete dynamic protection system with both self-sensing of damage and active anti-corrosion as described in claim 6, characterized in that, The component mass percentage of the cement-based material is: 45% - 55% of 52.5 ordinary Portland cement, 5% - 12% of silica fume, 35% - 45% of quartz sand, and the particle size distribution of the quartz sand is 20 - 100 mesh.

8. The reinforced concrete dynamic protection system with self-sensing of damage and active anti-corrosion as claimed in claim 6, wherein, The diameter of the copper nanofibers is 50 - 200 nm, the length is 1 - 5 μm, and they are uniformly dispersed by the sodium polystyrene sulfonate dispersant. The surface is coated with a silica insulation layer, the thickness of the silica insulation layer is 10 - 50 nm, and the breakdown field strength ≥ 20 kV / mm.

9. The reinforced concrete dynamic protection system with both self-sensing of damage and active anti-corrosion as described in claim 6, characterized in that, 0.05% - 0.3% by mass of a titanate coupling agent is incorporated into the conductive self-sensing concrete to enhance the interfacial bonding force and conductive performance between the copper nanofibers and the cement matrix.