A concrete precast component curing-maintenance integrated electric heating system and method

Abstract

The application discloses a concrete prefabricated component curing-maintenance integrated electric heating system and method, relates to the technical field of rapid curing of concrete components and heating, deicing and snow melting in cold regions, and the system comprises a concrete model, a carbon fiber heating group and a temperature control device; wherein the concrete model is used for mounting the carbon fiber heating group and fixing and supporting and heat preserving the concrete component; the carbon fiber heating group is built in the concrete component as an electric heating element, can realize rapid curing in the manufacturing stage, and has a heating function in the use stage, and is used for heating in cold regions and deicing and snow melting; the temperature control device is connected with the heating group, intelligently adjusts temperature to meet the curing and heating or snow melting requirements, and meets temperature management in the whole life cycle. The application can rapidly prefabricate the concrete component with the self-heating function, realizes integrated manufacturing of the prefabricated component functions, and improves the comprehensive efficiency of concrete curing and maintenance in cold regions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rapid curing of concrete components and heating, deicing and snow melting in cold regions, in particular to a concrete precast component curing-maintenance integrated electric heating system and method. BACKGROUND

[0002] The production of concrete precast components is the basis for the development of new building industrialization, but the existing production of precast components mainly uses steam curing. This curing method has problems such as high investment, low thermal efficiency, high process maintenance cost, and complicated temperature automatic adjustment, which leads to high overall production cost. In addition, the condensation of steam causes poor working conditions inside the factory, which affects the production efficiency and safety of workers.

[0003] Electric heating curing technology has become an effective method to replace steam curing due to its good economy and multifunctionality. Electric heating is flexible and suitable for rapid production in commercial concrete precast industry, and can also meet the needs of concrete construction in cold regions. However, with the hardening of concrete, the resistivity of concrete material increases dramatically, which leads to a significant decrease in electric heating effect.

[0004] To improve the sudden drop of electrical conductivity of concrete during the hardening process, the current research generally uses conductive concrete as the base material of the component. The incorporation of conductive materials such as steel fibers, carbon fibers, graphite or carbon black can control the resistivity of the material and improve the electric heating performance. However, the process of preparing conductive concrete is complex and costly, and there are problems such as temperature unevenness caused by poor dispersibility of conductive materials and impact on the mechanical and durability performance of concrete, which greatly limits its large-scale application in actual engineering.

[0005] Short carbon fibers are changed into continuous carbon fiber bundle (or tape, cloth) products, which change the complex electrical path inside the concrete material into a set of high-speed electrical path, effectively solving the above problems. In addition, carbon fiber products are also widely used in heating and snow melting fields, using resistance heating principle and heat conduction to solve the heating problem of hardened concrete components. However, these electric heating application technologies and fields are mostly fragmented, lacking effective integration, which limits the comprehensive benefits in actual engineering.

[0006] Based on the design concept of structure and function integration, although conductive concrete can be used as an electric heating element to achieve rapid electric curing and deicing and snow melting functions in cold regions during maintenance. However, considering environmental protection and sustainable development, combined with the use of green electricity, there is currently a lack of effective methods to integrate these functions into a unified system, therefore, it is necessary to design a concrete precast component curing-maintenance integrated electric heating system and method to reduce the cost of curing and maintenance of concrete and improve the efficiency of rapid curing and maintenance. SUMMARY

[0007] The purpose of the present application is to provide a concrete prefabricated component curing-maintenance integrated electric heating system and method, which can reduce the cost of concrete curing and maintenance, and improve the efficiency of rapid curing and maintenance.

[0008] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0009] In a first aspect, the present application provides a concrete prefabricated component curing-maintenance integrated electric heating system, which is applied to the rapid manufacturing stage and the cold region maintenance stage of a concrete component. The rapid manufacturing stage is the stage of curing the poured concrete to obtain the concrete component. The cold region maintenance stage is the stage of heating the surface of the concrete component or melting ice and snow. The concrete prefabricated component curing-maintenance integrated electric heating system comprises a concrete model, a carbon fiber heating group, and a temperature control device.

[0010] The concrete model internally places the carbon fiber heating group and externally installs a heat preservation mold. The concrete model is used to fix and support the poured concrete and provide heat preservation in the rapid manufacturing stage, so that the poured concrete is rapidly cured and formed into the concrete component.

[0011] The carbon fiber heating group is arranged in the interior of the concrete model. The carbon fiber heating group serves as an electric heating element for rapid curing in the rapid manufacturing stage and provides heating or snow-melting function in the cold region maintenance stage of the concrete component.

[0012] The temperature control device is connected with the carbon fiber heating group. The temperature control device is used to collect the environmental temperature and control the power in real time, and adjust the temperature of the carbon fiber heating group when electric heating according to the environmental temperature. In the rapid manufacturing stage, the temperature of the concrete component is in a first temperature range. In the cold region maintenance stage, the temperature of the concrete component is in a second temperature range. The first temperature range corresponds to the temperature range that meets the rapid curing requirement of the concrete component. The second temperature range corresponds to the temperature range that meets the heating or snow-melting requirement of the surface of the concrete component.

[0013] Optionally, the concrete prefabricated component curing-maintenance integrated electric heating system further comprises a high reflectivity plate. The high reflectivity plate is installed on the outer surface of the concrete component after pouring the concrete. The high reflectivity plate is used to prevent heat loss in the manufacturing stage of the prefabricated concrete component, and plays a heat preservation role. In the cold region maintenance stage after the prefabricated concrete component is completed, the high reflectivity plate plays a heat insulation role.

[0014] Optionally, the carbon fiber heating group comprises a plurality of parallel strip-shaped carbon fiber bundles, two ends of the strip-shaped carbon fiber bundles are respectively connected with one end of a power supply cable through electrodes, and the other end of the power supply cable is connected with the temperature control device.

[0015] The strip-shaped carbon fiber bundles inside the concrete member are electrified, and the concrete member reaches the required temperature due to Joule heating effect and heat conduction, and the following formula is used for calculation:

[0016] P = [h * A * (T-t) + m * c (T-T 始 ) / Δt] * a;

[0017] Wherein, P is power, unit is w, h is the heat transfer coefficient of carbon fiber bundle, unit is w / m 2 ·℃, A is the surface area of carbon fiber bundle arrangement, unit is m 2 , T is the required temperature of the concrete member, unit is ℃, t is the ambient temperature, unit is ℃, m is the mass of the concrete member, unit is kg, c is the specific heat capacity of concrete, unit is J / (kg·℃), T 始 is the initial temperature of the concrete member, unit is ℃, Δt is the required time for temperature rise, unit is s, and a is the correction coefficient.

[0018] Optionally, the temperature control device comprises a temperature acquisition module and a voltage and current control module.

[0019] The temperature acquisition module is connected with the voltage and current control module, and the voltage and current control module is further connected with the power supply cable.

[0020] The temperature acquisition module is used for real-time acquisition of the ambient temperature, and the voltage and current control module is used for controlling the temperature of the carbon fiber heating group during electric heating by adjusting the size of the input voltage and current of the carbon fiber heating group according to the ambient temperature.

[0021] Optionally, the connection between the strip-shaped carbon fiber bundle and the power supply cable is wrapped with an epoxy resin layer, and the surface of the epoxy resin layer is further wrapped with a heat shrink tube.

[0022] The concrete member is rapidly cured and demolded to form a single finished product, and a 0.5mm-2mm thick graphite-based heat-conducting coating or graphene heat-conducting coating is arranged on the surface close to the carbon fiber heating group.

[0023] Optionally, the first temperature range is 45-55℃, and the second temperature range is 40-50℃.

[0024] In a second aspect, the application provides a concrete prefabricated component curing-maintenance integrated electric heating method, which is applied to a rapid manufacturing stage and a cold region maintenance stage of a concrete component. The rapid manufacturing stage is a stage of curing and curing of the concrete component after concrete pouring and vibration. The cold region maintenance stage is a stage of heating or snow and ice melting of the surface of the concrete component. The concrete prefabricated component curing-maintenance integrated method comprises the following steps:

[0025] The rapid manufacturing stage comprises the following steps:

[0026] The poured concrete is fixed and supported and heat-insulated by using a concrete model to form a concrete component;

[0027] The concrete component is electrically heated by using a carbon fiber heating group to generate heat after being powered on;

[0028] The temperature control device is used to collect the ambient temperature in real time, and the temperature of the carbon fiber heating group during electric heating is adjusted according to the ambient temperature, so that the temperature of the concrete component is in a first temperature interval corresponding to the rapid curing requirement of the concrete component;

[0029] The cold region maintenance stage comprises the following steps:

[0030] The concrete component is electrically heated by using the carbon fiber heating group to generate heat after being powered on;

[0031] The temperature control device is used to collect the ambient temperature in real time, and the temperature of the carbon fiber heating group during electric heating is adjusted according to the ambient temperature, so that the temperature of the concrete component is in a second temperature interval corresponding to the heating or snow and ice melting requirement of the surface of the concrete component.

[0032] In a third aspect, the application provides a multi-module combined electric heating system, which is based on the concrete component of the first aspect, adopts the plate-shaped concrete component to form a concrete slab, and connects a plurality of concrete slabs with built-in carbon fiber bundles in a specific circuit combination mode to form a cold region maintenance network system.

[0033] Each group is composed of a plurality of concrete slabs connected in series, and a plurality of groups are connected in parallel to reduce total power consumption and maximize energy utilization by optimizing circuit design.

[0034] The spacing between each adjacent two concrete slabs is controlled to be between 10 mm and 20 mm, and the gap is filled with modified asphalt sealant.

[0035] The multi-module combined electric heating system comprises a temperature sensor embedded in each concrete slab for monitoring the temperature in the slab in real time; a partition control unit connected to a plurality of concrete slabs in series, responsible for heating control and data acquisition of the partition;

[0036] The central control unit communicates with each partition control unit, receives temperature data, dynamically adjusts the supply voltage and current, and controls the heating power of each concrete slab;

[0037] The power control device is connected between the central control unit and the carbon fiber heating belt to adjust the voltage and current;

[0038] The multi-module combined electric heating system adopts intelligent control and partition control strategy, dynamically adjusts the heating strategy according to real-time environment and road surface conditions, and optimizes energy utilization.

[0039] According to the specific embodiments provided in the application, the following technical effects are disclosed:

[0040] The application provides a concrete prefabricated component maintenance-maintenance integrated electric heating system and method, which integrates a rapid manufacturing system in a rapid manufacturing stage and a cold region maintenance system in a cold region maintenance stage into the same system, utilizes the high thermal conductivity and uniform heating characteristics of the carbon fiber heating group, and provides a more economical, environmentally friendly and efficient system for rapid maintenance and cold region maintenance of prefabricated concrete components. Not only is the integration between the rapid manufacturing system and the cold region maintenance system realized, but also the carbon fiber heating group can realize rapid manufacturing, rapid maintenance and rapid snow melting and ice melting after being powered on, thereby shortening the time for concrete maintenance and heating or snow melting and ice melting and improving the efficiency of maintenance and heating or snow melting and ice melting. Moreover, through the same set of integrated system, the system can be converted to a snow melting and ice melting mode in winter without additional equipment or energy investment, thereby effectively reducing the cost of system upgrading or improvement and reducing the cost of concrete maintenance and heating or snow melting and ice melting. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0042] Figure 1 A structural schematic diagram of a concrete prefabricated component maintenance-maintenance integrated electric heating system according to an embodiment of the application.

[0043] Figure 2 A structural schematic diagram of a carbon fiber heating group according to an embodiment of the application.

[0044] Figure 3 Structure diagram of high reflectivity plate provided by an embodiment of the present application.

[0045] Figure 4 Structure diagram of heat preservation mold provided by an embodiment of the present application.

[0046] Figure 5 Cross-sectional diagram of test device provided by an embodiment of the present application.

[0047] Figure 6 Combined snow melting mode diagram of test device provided by an embodiment of the present application.

[0048] Figure 7 Flow diagram of rapid manufacturing stage of a concrete precast component maintenance-maintenance integrated method provided by an embodiment of the present application.

[0049] Figure 8 Flow diagram of cold region maintenance stage of a concrete precast component maintenance-maintenance integrated method provided by an embodiment of the present application.

[0050] Figure 9 Maintenance diagram of single block concrete plate in rapid manufacturing stage provided by an embodiment of the present application.

[0051] Figure 10 Heating snow melting effect diagram of single block concrete plate in later use provided by an embodiment of the present application.

[0052] Reference signs:

[0053] 1-concrete model; 2-carbon fiber heating group; 3-power supply cable; 4-heat preservation mold; 5-temperature measurement line; 6-temperature acquisition module; 7-voltage and current control module; 8-power supply; 9-strip-shaped carbon fiber bundle; 10-high reflectivity plate; 11-anchor rod; 12-steel mesh; 13-concrete cushion block; 14-signal line; 15-partition control unit; 16-central control unit; 17-power control device; 18-environmental sensor; 19-control cabinet. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0055] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0056] Example 1

[0057] like Figure 1 As shown, this embodiment proposes an integrated electric heating system for curing and maintaining precast concrete components, which is applied to the rapid manufacturing stage and the cold-region maintenance stage of concrete components. The rapid manufacturing stage is the stage of curing the concrete component after concrete pouring and compaction, and the cold-region maintenance stage is the stage of heating the surface of the concrete component or melting ice and snow.

[0058] The integrated electrothermal system for curing and maintaining precast concrete components mainly includes a concrete model 1, a carbon fiber heating element 2, and temperature control equipment.

[0059] In this process, concrete model 1 serves as a mold for preparing concrete components. The poured concrete is placed inside concrete model 1. During the rapid manufacturing phase, concrete model 1 is used to fix and support the poured concrete, allowing it to solidify and take shape to form the concrete component. Therefore, concrete model 1 is essentially a detachable mold or template for concrete, used to form and support the concrete until it hardens and has sufficient structural strength to maintain its shape. The material of concrete model 1 can be wood, steel, aluminum, or plastic, etc. The concrete component is the final component formed after concrete model 1 is removed, such as a concrete road slab or bridge deck.

[0060] Carbon fiber heating element 2 is installed inside the concrete component to generate heat when electricity is applied, thereby electrically heating the concrete component.

[0061] A temperature control device, connected to the carbon fiber heating element 2, is used to collect ambient temperature in real time and adjust the temperature of the carbon fiber heating element 2 during electric heating based on the ambient temperature. This ensures that the temperature of the concrete component is within a first temperature range during the rapid manufacturing phase and within a second temperature range during the cold-region maintenance phase. The first temperature range is designed to meet the rapid curing requirements of the concrete component, while the second temperature range is designed to meet the heating or snow / ice melting requirements of the concrete component. In this embodiment, the first temperature range is set to 45-55℃, and the second temperature range is set to 40-50℃.

[0062] In this embodiment, the integrated electric heating system for curing and maintaining precast concrete components also includes a thermal insulation mold 4, which is detachably disposed around the concrete model 1. The thermal insulation mold 4 is used to insulate the concrete model 1 and the concrete components during the rapid manufacturing stage. The material can be polystyrene foam board or polyurethane foam board, etc.

[0063] In the embodiment, the concrete prefabricated component curing-maintaining integrated electric heating system further comprises a high reflectivity plate 10 arranged on the upper surface of the concrete component and opposite to the carbon fiber heating group 2, which is used to reflect the heat generated by the carbon fiber heating group 2.

[0064] In the embodiment, the carbon fiber heating group 2 comprises a plurality of parallel carbon fiber bundles, preferably strip-shaped carbon fiber bundles 9, the two ends of each strip-shaped carbon fiber bundle 9 being connected to one end of a power supply cable 3 through electrodes, and the other end of the power supply cable 3 being connected to the temperature control device. The carbon fiber bundles can also be arranged in other shapes such as square or sheet shape. The electrodes can be connected to the strip-shaped carbon fiber bundles 9 and the power supply cable 3 in the form of high-conductivity graphite glue, which can help to distribute the current more evenly, so that the heating of the carbon fiber bundles is more uniform and local overheating is avoided.

[0065] In the embodiment, the carbon fiber heating group 2 is arranged at a position 20-30 mm away from the surface of the concrete component, and the distance between every two adjacent strip-shaped carbon fiber bundles 9 in the carbon fiber heating group 2 is 80-120 mm, which ensures uniform heat transfer and meets the temperature requirements of rapid curing and snow-melting and ice-melting integration.

[0066] In the embodiment, the strip-shaped carbon fiber bundles 9 are made of epoxy resin-carbon fiber bundle composite material. The strip-shaped carbon fiber bundles 9 made of epoxy resin-carbon fiber bundle composite material are prepared by compounding high-thermal-conductivity carbon fiber cloth and epoxy resin, which improves the thermal conductivity and durability. By using the carbon fiber heating group 2 made of epoxy resin-carbon fiber bundle composite material, the good electrothermal performance and low energy consumption characteristics of carbon fiber are utilized, and the strip-shaped carbon fiber bundles 9 are embedded in the production of prefabricated concrete by using the strip-shaped carbon fiber bundle 9 electrothermal method. During use and maintenance, the embedded strip-shaped carbon fiber bundles 9 can also realize heating or snow-melting and ice-melting functions in cold regions by using new energy power.

[0067] In the embodiment, the temperature control device comprises a temperature acquisition module 6 and a voltage and current control module 7. The temperature acquisition module 6 is connected to the voltage and current control module 7, and the voltage and current control module 7 is further connected to the power supply cable 3. The temperature acquisition module 6 is used to acquire the ambient temperature in real time, and the voltage and current control module 7 is used to control the temperature of the carbon fiber heating group 2 during electric heating by dynamically adjusting the voltage and current inputted by the carbon fiber heating group 2 according to the ambient temperature, so as to meet the temperature requirements of rapid manufacturing and cold region maintenance and realize integrated temperature management.

[0068] In this embodiment, the temperature acquisition module 6 comprises a temperature measurement line 5, which comprises a metal head close to the surface of the concrete model 1, and the metal head is used to acquire the ambient temperature in real time. On the basis of the temperature measurement line 5, a temperature measuring device can also be arranged on the surface of the concrete member to dynamically display the real-time temperature.

[0069] In this embodiment, the connection between the strip-shaped carbon fiber bundle 9 and the power supply cable 3 is wrapped with an epoxy resin layer, and the surface of the epoxy resin layer is further wrapped with a heat shrink tube. The epoxy resin layer is used to fix and insulate the connection between the strip-shaped carbon fiber bundle 9 and the power supply cable 3, and after curing, the heat shrink tube is used for further protection.

[0070] In this embodiment, a plurality of concrete pads 13 are uniformly arranged between the carbon fiber heating group 2 and the concrete model 1, and the concrete pads 13 are used to separate the carbon fiber heating group 2 and the concrete model 1, so as to realize uniform heating of the carbon fiber heating group 2 to the concrete member in the concrete model 1, and improve the heating effect and efficiency.

[0071] In this embodiment, the strip-shaped carbon fiber bundle 9 inside the concrete member is electrified, and due to the Joule heating effect and heat conduction, the concrete member reaches the required temperature, which is calculated according to the following formula:

[0072] P=[h·A·(T-t)+m·c(T-T 始 ) / Δt]·a;

[0073] Wherein, P is the power, the unit is w, h is the heat transfer coefficient of the carbon fiber bundle, the unit is w / m 2 ·℃, A is the surface area of the carbon fiber bundle, the unit is m 2 , T is the required temperature of the concrete member, the unit is ℃, t is the ambient temperature, the unit is ℃, m is the mass of the concrete member, the unit is kg, c is the specific heat capacity of the concrete, the unit is J / (kg·℃), T 始 is the initial temperature of the concrete member, the unit is ℃, Δt is the required time for temperature rise, the unit is s, and a is the correction coefficient, and a is taken as 1.15 in this embodiment.

[0074] According to the size of the concrete member itself, the required temperature of the rapid manufacturing and cold region maintenance of the concrete member is combined with the above formula, so as to calculate the electrification power. The power regulation of the concrete member in the rapid manufacturing stage and the cold region maintenance stage is realized by real-time acquisition of the temperature data of the temperature control equipment to adjust the input power, so as to change the input of voltage and current, and ensure that the concrete member reaches the optimal temperature in the rapid maintenance and snow melting and ice melting process.

[0075] In this embodiment, the concrete component is rapidly cured and demolded to form a single finished product, and a 0.5mm-2mm thick graphite-based or graphene-based thermal conductive coating is arranged on the surface close to the carbon fiber heating group 2.

[0076] In this embodiment, since the carbon fiber bundle has good electrothermal performance, during the rapid manufacturing stage of the concrete component, 3-4 times the maintenance power can be taken to rapidly heat up, for example, if the maintenance power is 120w, the heating power during rapid heating can be 4 times the maintenance power, which can be 480w. During the cold region maintenance stage, 1-2 times the maintenance power can be taken. Since the carbon fiber heating group 2 itself is a dynamically adjustable power, during the initial stage of curing, by using a heating power of 3-4 times the maintenance power to rapidly heat up, the required temperature of the concrete can be quickly reached, thereby accelerating the cement hydration reaction and the hardening process of the concrete. This method is especially suitable for construction in low temperature environments, which can effectively shorten the curing time and improve the construction efficiency.

[0077] In this embodiment, the carbon fiber heating group 2 is embedded in the concrete component, and the carbon fiber heating group 2 is connected to the power supply cable 3 in parallel and series to form an optimized electrothermal network, realizing the integration of the rapid curing and heating or snow melting and ice melting functions of the concrete component. During the rapid manufacturing stage and the cold region maintenance stage of the concrete component, the temperature data of the concrete component is collected by the temperature control device, and the input power is adjusted to ensure that the concrete component reaches the optimal temperature in different stages by changing the voltage and current, realizing temperature management throughout the life cycle.

[0078] In this embodiment, the high reflectivity plate 10 is made of polyurethane-carbon fiber composite material, which is composed of continuous fibers and polyurethane resin, and is arranged on the other surface of the concrete component away from the carbon fiber heating group 2 and opposite to the carbon fiber heating group 2, so as to ensure the best reflection effect of the heat generated by the carbon fiber heating group 2, enhance the thermal efficiency, and support the integrated function. By arranging the high reflectivity plate 10 made of polyurethane-carbon fiber composite material, not only the mechanical strength of the high reflectivity plate 10 is strengthened, but also the heat reflection effect is improved, the heat energy loss is reduced, and it is especially suitable for snow melting in winter.

[0079] In this embodiment, the thermal insulation mold 4 is made of polystyrene foam, and the thermal insulation mold 4 is arranged around the concrete mold and can be reused to improve the thermal insulation effect.

[0080] In order to make the technical scheme of the present application more clear, an implementable technical scheme is described in the form of an example as follows.

[0081] In this embodiment, the concrete model 1 has a length of 1000mm, a width of 500mm, and a thickness of 120mm. The required heating power is calculated to be 480W and the maintenance power is 120W using formula (1), thereby determining the size of the carbon fiber bundle: a length of 900mm and a width of 25mm. The required heating voltage is 36V and the maintenance voltage is 18V, so as to ensure that the concrete component reaches 45-55℃ in the rapid manufacturing stage and 40-55℃ in the snow melting and ice thawing stage. Two layers of steel mesh are set in the concrete model 1. The carbon fiber bundles are connected in parallel through the power supply cable 3. The high thermal conductivity carbon fiber cloth is cut with a cutting tool to form four carbon fiber bundles with a length of 900mm and a width of 25mm. The spacing between each pair of adjacent carbon fiber bundles is controlled at 80-120mm as shown in the figure. The connected carbon fiber bundles are immersed in cast-type epoxy resin for insulation treatment. After the treatment, electrical tests are performed to ensure that there is no leakage or poor insulation. The carbon fiber bundle epoxy resin composite material is prepared. Heat shrink tubing is used at the connection between the carbon fiber bundles and the power supply cable 3 for further insulation, which can also be waterproof and moisture-proof, and finally form the carbon fiber heating group 2.

[0082] Will Figure 2 The carbon fiber heating element 2 shown is tied to a reinforcing mesh with thin steel wire. Four concrete blocks 13, each 20mm in length, width, and height, are evenly distributed in the concrete model 1. The wire mesh 12 with the carbon fiber heating element 2 attached is then placed on the concrete blocks 13. Figure 4 As shown, ensure that the carbon fiber heating element 2 is 20mm away from the lower surface of the concrete model 1 for effective and uniform heating. Simultaneously, fix the temperature measuring wire 5 to the reinforcing mesh with thin steel wire, ensuring that the metal head of the temperature measuring wire 5 is within 20mm of the surface of the concrete model 1. Pour C50 cement concrete into the concrete model 1 and vibrate it using a concrete vibrator to ensure a tight bond between the carbon fiber heating element 2 and the concrete. When the cement concrete reaches a thickness of 100mm, place the reinforcing mesh to ensure the load-bearing capacity of the concrete component, and continue pouring to a thickness of 120mm. A pre-prepared high-reflectivity polyurethane-carbon fiber composite plate 10 is prepared. This high-reflectivity plate 10 uses continuous fibers to ensure higher strength and rigidity. Specifically, the fibers are pre-impregnated in polyurethane resin, ensuring complete fiber coverage, under vacuum or pressure to avoid air bubbles and ensure uniform distribution of the polyurethane resin. The curing process can be carried out at room temperature or accelerated by heating. The cured composite material is then machined and cut to form a high-reflectivity plate 10 with a length of 1000mm and a width of 500mm. The highly reflective plate 10 is installed on the upper surface of the concrete model 1 by a number of evenly distributed anchor rods 11, such as... Figure 3 As shown, this ensures that heat and moisture are not lost during the rapid manufacturing stage, effectively preventing heat loss during the snow and ice melting stage and improving the efficiency of snow and ice melting.

[0083] Then, a polystyrene foam material, a heat preservation mold 4 with a thickness of 50 mm, is installed around the concrete model 1, as shown in Figure 4 At the same time, the heat preservation cotton is covered on the upper surface of the concrete model 1 to ensure the heat loss in the rapid manufacturing stage and improve the heat preservation performance. The temperature measuring wire 5 is connected with the temperature acquisition module 6 to collect the temperature data, and the power supply cable 3 is connected with the voltage and current control module 7 to control the heating power, thereby forming a temperature control device, which is installed and connected with the power supply 8, as shown in Figure 1 The alternating frequency power supply can be used. According to the temperature acquisition module 6, the collected temperature is displayed in real time. By operating the alternating frequency power supply and the voltage and current control module 7, the voltage and current (i.e. power) flowing through the strip-shaped carbon fiber bundle 9 are controlled, so that the strip-shaped carbon fiber bundle 9 reaches the required temperature. The finally formed concrete prefabricated component maintenance-maintenance integrated electric heating system is shown in Figure 5 .

[0084] In this embodiment, when the solidification and maintenance of the concrete component are performed, the concrete model 1 is first pre-maintained for 6 hours. The temperature control device supplies power to the carbon fiber heating group 2 in the concrete component. The carbon fiber heating group 2 generates heat to heat for 24 hours, and the temperature is 55℃, which ensures that the concrete component is rapidly prepared and has sufficient strength and durability. The carbon fiber heating group 2 can be directly powered to perform electric heating, and snow melting and ice melting can be performed. Alternatively, the concrete mold can be placed reversely, so that one side of the carbon fiber heating group 2 faces upward. At this time, due to the reverse inversion, the concrete component is located on the upper surface of the concrete component, and the high reflectivity plate 10 is located on the lower surface of the concrete component. In this case, the snow melting and ice melting effect is better. The temperature control device supplies power to the carbon fiber heating group 2 in the concrete component. The heat generated by the carbon fiber heating group 2 is rapidly conducted to the surface of the concrete component, and snow melting and ice melting are started. The temperature control device can also control the power supply time and the size of the voltage and current to achieve the best performance of the snow melting effect, while avoiding energy waste. After the snow melting is completed, the power supply is stopped, and the ice and snow on the surface of the concrete component will quickly melt.

[0085] Pre-maintenance for 6 hours refers to a 6-hour pre-maintenance process, which is as follows:

[0086] (1) Concrete pouring

[0087] Complete concrete pouring: according to the design requirements, the concrete is uniformly poured into the concrete model 1 to ensure that the concrete model 1 is completely filled, and proper vibration techniques are followed to eliminate air bubbles and voids.

[0088] (2) Initial treatment

[0089] Surface finishing: Immediately after pouring the concrete, use a trowel or other appropriate tool to smooth the surface of the concrete, ensuring that the surface is flat and smooth.

[0090] (3) Cover protection

[0091] Immediate covering: After pouring is complete, the concrete surface should be immediately covered with plastic film. This helps control moisture evaporation from the concrete surface and maintain the appropriate curing temperature.

[0092] Insulation: Insulation molds 4 are placed around the concrete form 1 to facilitate insulation.

[0093] (4) Pre-curing

[0094] For the next 6 hours, the covering material on the surface of the concrete is not removed, ensuring that the temperature and humidity conditions are conducive to the progress of the hydration reaction. Natural hydration reaction occurs at room temperature for 6 hours. After pre-curing is complete, the carbon fiber heating group 2 is powered on, and the rapid production stage is entered through the electric heating effect of the carbon fiber heating group 2.

[0095] In this embodiment, the temperature acquisition module 6 is connected to the surface of the concrete form 1 near one end of the carbon fiber heating group 2 through the temperature measurement line 5, and the voltage and current control module 7 is connected to the power cable 3, so as to control the preparation temperature and snow melting temperature of the concrete member according to the required control. By embedding carbon fiber bundles in the concrete member and utilizing the electric heating performance of the carbon fiber bundles, rapid curing and effective snow melting and ice melting of the concrete member are realized, and the application efficiency under harsh weather conditions is significantly optimized. By accurately calculating the required power, the size of the carbon fiber bundle and the required voltage can be determined in the design stage, ensuring that the concrete member reaches the optimal temperature during rapid curing and snow melting and ice melting. This integrated solution not only improves construction efficiency, but also enhances the safety and environmental adaptability of the concrete member. Not only does it solve the limitations of existing precast concrete members in snow melting and ice melting, but it also provides an efficient and reliable solution under various weather conditions, optimizing operation costs and maintenance frequency, thereby exhibiting significant advantages in modern construction projects. By combining heating technology, reflection technology, insulation technology, and precise control technology, an integrated solution is provided, which is suitable for various weather conditions and various different use scenarios such as roads, bridges, and other infrastructure projects, and can significantly improve construction efficiency and use convenience.

[0096] This embodiment embodies the design concept of functional integration by embedding the carbon fiber heating group 2 in the concrete member, serving as both a heating element in the rapid manufacturing stage and providing snow-melting and ice-melting functions in the use stage. The carbon fiber heating group 2 is connected to the power cable 3 through a parallel connection, ensuring stable energy supply and uniform heat distribution. The high-reflectivity plate 10 is installed on the outer surface of the concrete member, effectively enhancing thermal efficiency and reducing heat loss. The insulation mold 4 surrounds the outside of the concrete mold, helping to maintain the required temperature environment during the rapid manufacturing stage and ensuring rapid hardening of the concrete. The temperature control device connects the carbon fiber heating group 2 and the power cable 3, allowing temperature adjustment to meet the specific needs of rapid curing and snow-melting and ice-melting, providing a more direct, controllable, and cost-effective solution.

[0097] Embodiment 2

[0098] This embodiment proposes a concrete prefabricated member curing-maintenance integrated method, which is applied to the rapid manufacturing stage and the cold region maintenance stage of the concrete member. The rapid manufacturing stage is the stage of obtaining the concrete member by rapid curing after concrete pouring and vibrating, and the cold region maintenance stage is the stage of heating or melting ice and snow on the surface of the concrete member.

[0099] As shown in Figure 7 This embodiment is mainly an electric heating method applied to the rapid manufacturing stage of concrete, which is based on the concrete prefabricated member curing-maintenance integrated electric heating system in embodiment 1. The method specifically includes the following steps:

[0100] Step S101, using the concrete model 1 to fixedly support the poured concrete to form a concrete member.

[0101] Step S102, using the carbon fiber heating group 2 to generate heat after being powered on to electrically heat the concrete member.

[0102] Step S103, using the temperature control device to collect the ambient temperature in real time, and adjusting the temperature of the carbon fiber heating group 2 during electric heating according to the ambient temperature, so that the temperature of the concrete member is in a first temperature interval, and the first temperature interval is a temperature interval corresponding to the rapid curing requirements of the concrete member.

[0103] Embodiment 3

[0104] This embodiment proposes a concrete prefabricated member curing-maintenance integrated method, which is applied to the rapid manufacturing stage and the cold region maintenance stage of the concrete member. The rapid manufacturing stage is the stage of obtaining the concrete member by curing after concrete pouring and vibrating, and the cold region maintenance stage is the stage of heating or melting ice and snow on the surface of the concrete member.

[0105] AsFigure 8 As shown, the embodiment is mainly applied to the electric heating method in the cold region maintenance stage of the concrete member. The method is based on the concrete prefabricated member maintenance-maintenance integrated method in embodiment 1. The method specifically includes the following steps:

[0106] Step S201, using the carbon fiber heating group 2, generating heat after power on, and electrically heating the concrete member.

[0107] Step S202, using the temperature control device to collect the ambient temperature in real time, and adjusting the temperature of the carbon fiber heating group 2 during electric heating according to the ambient temperature, so that the temperature of the concrete member is in the second temperature interval, and the second temperature interval is the temperature interval corresponding to the snow melting and ice melting requirements of the concrete member.

[0108] Embodiment 4

[0109] The embodiment proposes a multi-module combined electric heating system. A plurality of concrete slabs are connected to realize a combined snow melting mode. For example, 20 concrete slabs with built-in high-performance carbon fiber bundles are connected according to an optimized circuit combination mode to realize efficient snow melting and ice melting effect and minimize energy consumption. Specifically, based on the concrete member described in embodiment 1, a plurality of concrete slabs with built-in carbon fiber bundles are connected according to a specific circuit combination mode to form a network system for snow melting and ice melting.

[0110] Each of the plurality of concrete slabs is connected in series to form a group, and a plurality of groups are connected in parallel. By optimizing the circuit design, the total power consumption is reduced, and the energy utilization is maximized.

[0111] The spacing between each adjacent two concrete slabs is controlled to be between 10mm and 20mm, and the gap is filled with modified asphalt sealant to ensure the integrity and waterproofness of the pavement and support the realization of the integrated function.

[0112] The multi-module combined electric heating system includes a temperature sensor embedded in each concrete slab for real-time monitoring of the temperature in the slab.

[0113] The partition control unit is connected to a plurality of series-connected concrete slabs and is responsible for heating control and data acquisition in the partition.

[0114] The central control unit communicates with each partition control unit, receives temperature data, dynamically adjusts the supply voltage and current, and realizes heating power control of each concrete slab.

[0115] The power control device is connected between the central control unit and the carbon fiber heating belt to adjust the voltage and current.

[0116] The multi-module combined electric heating system adopts intelligent control and partition control strategy, dynamically adjusts the heating strategy according to real-time environment and road surface conditions, and optimizes energy utilization.

[0117] In the embodiment, each concrete plate has a size of 1000mm in length, 500mm in width and 120mm in height, and four high-performance carbon fiber bands arranged in parallel are embedded in the concrete plate, the carbon fiber bands have a length of 900mm, a width of 25mm and a spacing of 80mm.

[0118] In the embodiment, the concrete plates are connected in series in groups of four to form five groups connected in parallel, and the five groups form a snow-melting and ice-melting network.

[0119] In the rapid heating stage, the system adjusts the power supply voltage to 144V, realizes a heating power of 480W for each plate, a total power of 9600W, and rapidly raises the surface temperature of the concrete plate to 40-55℃.

[0120] In the maintenance stage, the system adjusts the power supply voltage to 72V, realizes a maintenance power of 120W for each plate, a total power of 2400W, and maintains the snow-melting and ice-melting effect while reducing energy consumption.

[0121] The specific implementation steps of the multi-module combined electric heating system in the embodiment are as follows:

[0122] First, four concrete plates are connected in series to form a group, and five groups are formed in parallel. Each concrete plate has a size of 1000mm in length, 500mm in width and 120mm in height, and four high-performance carbon fiber bands (length 900mm, width 25mm, spacing 80mm) are embedded in the concrete plate. The spacing between the plates is controlled to be between 10mm and 20mm, and the gap is filled with modified asphalt sealant. In the rapid heating stage, a voltage of 36V is used, the heating power of each plate is 480W, the total voltage is 144V (36V*4 plates in series), the total current is 66.65A (13.33A per group*5 groups in parallel), and the total power is 9600W. Through this configuration, the surface temperature of the concrete plate can be raised to 40-55℃ in a short time, and snow-melting and ice-melting can be rapidly realized.

[0123] After entering the maintenance stage, the voltage is adjusted to 72V (18V*4 plates in series), the maintenance power of each plate is reduced to 120W, the total current is reduced to 33.35A (6.67A per group*5 groups in parallel), and the total power is reduced to 2400W. At this time, the system maintains the snow-melting effect while significantly reducing energy consumption.

[0124] To further optimize energy utilization, an intelligent control system and zoning control strategy are introduced. Each concrete slab is equipped with high-precision temperature sensors that monitor the internal temperature and environmental conditions in real-time. The data from these sensors is transmitted to the central control unit 16, which is installed in the control cabinet 19 on site, as shown in Figure 6

[0125] The power control device 17 uses solid-state relays to accurately adjust the supply voltage and current according to the instructions from the central control unit 16, achieving dynamic control of heating power. In this way, the system can avoid excessive heating and energy waste. For example, when a certain area reaches the set temperature or has no snow, the central control unit 16 can instruct the corresponding area to reduce power output or turn off heating.

[0126] The entire heating area is divided into multiple independent zoning control units 15, such as 4 slabs per zone, with a total of 5 zones. Each zoning control unit uses an embedded controller installed in the junction box of each zone, responsible for the on-off and power regulation of the heating elements in the zone, and collects temperature sensor data to upload to the central control unit 16 through signal lines 14. In this way, the system can activate or deactivate the heating function of specific areas according to the snow melting needs of different areas, improving the flexibility of the system and further reducing unnecessary energy consumption.

[0127] In addition, the system is also equipped with environmental sensors 18, such as outdoor temperature and humidity sensors, snow depth sensors, and wind speed and direction sensors, which are installed at key locations on the road or bridge. The central control unit 16 can use data from these sensors to preheat areas prone to icing in advance to prevent snow accumulation. In actual operation, when the environmental sensors 18 detect low temperature and snowfall warnings, the central control unit 16 starts the preheating mode. In the rapid heating stage, the system heats to 50°C according to the settings. After reaching the set temperature, the system automatically switches to the maintenance stage, reducing power output. If the temperature in a certain zone continues to be higher than the set value, the central control unit 16 can instruct the zoning control unit of that zone to further reduce power or temporarily turn off heating.

[0128] To ensure the safety and energy saving of the system, an overheat protector or thermistor is installed, which automatically cuts off the power supply when the temperature of the concrete slab exceeds the safe upper limit, preventing equipment damage and safety accidents. The system also has an electric energy metering module that monitors current, voltage, and power in real-time, records energy consumption data, and facilitates analysis and optimization of system operation. When energy consumption abnormally increases, the system can issue an alarm to prompt inspection. In addition, the system has remote monitoring and management functions, allowing management personnel to view system status in real-time, adjust parameters, and achieve fault diagnosis and rapid response through computers or mobile phones.

[0129] ​By installing temperature sensors 5, partition control units 15, power control devices 17, and environmental sensors 18 at key nodes, the system achieves an organic combination of intelligent control and partition control. The system can dynamically adjust the heating strategy according to real-time environmental and road conditions, ensuring the effectiveness of snow and ice melting while minimizing energy consumption and extending the service life of the equipment. This innovative design provides an efficient, reliable, and intelligent snow and ice melting solution for roads and bridges in cold regions.

[0130] This embodiment ingeniously proposes a modular snow melting power grid design. By combining several concrete slabs with built-in carbon fiber bundles in a specific series-parallel manner, a snow melting and ice melting power grid pattern is formed. The optimized circuit connection between the concrete slabs realizes cooperative heating of large areas. The partition control unit and the central control unit cooperate with each other to dynamically adjust the heating strategy according to real-time environmental and road conditions, ensuring uniform heat distribution and optimizing energy utilization. This modular design improves the flexibility and scalability of the system, making it suitable for roads and bridges of different sizes and shapes.

[0131] Figure 9 Maintenance diagram for single concrete slab in rapid manufacturing stage. The background is the rapid manufacturing stage, the rectangular frame is the thermal imaging shooting, and the right side digital bar represents the corresponding temperature of the single concrete slab in the rapid manufacturing stage. Figure 10 Heating snow melting effect diagram for single concrete slab in later use. The background is a snowfall scene that needs to be heated for snow melting, with an environmental temperature below 0°C and snow and ice melting approaching completion. The rectangular frame is also a thermal imaging shooting, and the right side digital bar represents the corresponding temperature of carbon fiber heating group 2.

[0132] The present application adopts carbon fiber bundle epoxy resin composite material as carbon fiber heating group, which can not only transfer heat more uniformly and quickly, but also has good insulation performance. In the manufacturing stage, the built-in carbon fiber bundle is used to heat and maintain the concrete member, realizing rapid forming; in the use stage, the embedded carbon fiber bundle is used to realize snow melting and ice melting function. The high reflectivity plate adopts polyurethane-carbon fiber composite material, which not only strengthens the mechanical strength of the plate, but also improves the heat reflection effect, significantly reduces the heat loss. Especially in the operation of snow melting and ice melting in winter, the high reflectivity plate can effectively reflect the heat back to the concrete surface, improve the heat utilization rate and reduce the energy consumption. By combining several concrete plates with built-in carbon fiber bundles in a specific series-parallel mode, a snow melting and ice melting power grid mode is formed. The concrete plates are connected through an optimized circuit, realizing the cooperative heating of a large area. The partition control unit and the central control unit cooperate with each other, dynamically adjust the heating strategy according to the real-time environment and road surface conditions, ensure the uniform distribution of heat, and optimize the energy utilization. This modular design improves the flexibility and scalability of the system, which is suitable for roads and bridges of different sizes and shapes. The heat preservation mold maintains the best temperature environment in the rapid manufacturing stage, ensuring the quality and performance of the concrete. The real-time monitoring and adjustment function of the temperature control equipment enables the system to automatically adjust according to the needs, improves the construction efficiency and use convenience, and enhances the safety and environmental adaptability of the components.

[0133] The core of the present application is to embed carbon fiber bundles into the concrete slab, to quickly cure the concrete slab by generating heat, and to quickly cure the concrete slab again by the heating element of the embedded carbon fiber bundle to achieve the effect of snow melting and ice melting on the surface of the concrete slab, indoor floor heating, bridge or road snow melting and ice melting function. And the concrete slab is produced by prefabrication, and each component (carbon fiber heating group, high reflectivity plate, etc.) in the concrete slab can be prefabricated first, and then several concrete slabs can be combined to form an integrated system to achieve the above functions. Through the optimization design of the embedded carbon fiber bundle, the uniform distribution of the carbon fiber bundle in the concrete is ensured, and the heat transfer efficiency is fundamentally improved. At the same time, the carbon fiber material has excellent corrosion resistance and anti-aging properties, and can maintain stable electrical conductivity in harsh environments. In addition, the electric heating performance of the embedded carbon fiber bundle is controllable, and the power can be adjusted in real time through the intelligent temperature control system to achieve accurate heating effect and avoid local overheating and energy waste. Moreover, the manufacturing process of the embedded carbon fiber bundle is relatively simple, which can be seamlessly combined with the conventional concrete production process, thereby reducing the production cost and technical threshold. Compared with the complex formula of traditional conductive concrete, the addition of the embedded carbon fiber bundle does not require special treatment, simplifying the material selection and preparation process. In addition, the present application allows the embedded carbon fiber bundle to be used for electric heating curing during the production stage of the concrete member, which not only improves the early strength of the concrete, but also can be used again for snow melting and ice melting in the later stage, showing its multifunctionality. The embedded carbon fiber bundle concrete slab can be combined with wind power generation, photovoltaic and other green power systems to provide sustainable energy solutions for infrastructure in cold regions, helping to achieve the goal of low carbon and environmental protection.

[0134] The technical features of the above embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present application.

[0135] The principles and implementation modes of the present application are described by specific examples, and the above examples are only used to help understand the method and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A concrete precast component curing-maintenance integrated electric heating system applied to a rapid manufacturing stage and a cold region maintenance stage of a concrete component, the rapid manufacturing stage being a stage of curing the concrete component after concrete pouring and vibrating, and the cold region maintenance stage being a stage of heating or snow and ice melting of a surface of the concrete component, characterized in that, The concrete prefabricated component maintenance and maintenance integrated electric heating system comprises a concrete model, a carbon fiber heating group and a temperature control device; The concrete model internally places the carbon fiber heating group and externally installs a heat preservation mold, which is used for fixing and supporting and heat preserving the poured concrete in the rapid manufacturing stage, so that the poured concrete is rapidly cured and formed into the concrete component; The carbon fiber heating group is arranged in the interior of the concrete model, and is used as an electric heating element for rapid curing in the rapid manufacturing stage to rapidly cure the prefabricated concrete component after being electrified to generate heat, and is also used for providing heating or snow melting and ice melting functions in the cold region maintenance stage of the concrete component after being electrified; The temperature control device is connected with the carbon fiber heating group, is used for collecting the ambient temperature and controlling the power in real time, and adjusts the temperature of the carbon fiber heating group during electric heating according to the ambient temperature, so that the temperature of the concrete component is in a first temperature range in the rapid manufacturing stage, and the temperature of the concrete component is in a second temperature range in the cold region maintenance stage; the first temperature range is a temperature range corresponding to the rapid curing requirement of the concrete component, and the second temperature range is a temperature range corresponding to the heating or snow melting and ice melting requirement of the surface of the concrete component; The carbon fiber heating group comprises a plurality of parallel strip-shaped carbon fiber bundles, both ends of the strip-shaped carbon fiber bundle are connected with one end of a power supply cable through electrodes respectively, and the other end of the power supply cable is connected with the temperature control device; The strip-shaped carbon fiber bundle in the concrete component is electrified, and the concrete component reaches the required temperature due to the Joule heating effect and heat conduction, and the following formula is used for calculation: P = [h - A - (T - t) + m - c (T - T 始 ) / △t] - a; wherein P is power, in w, h is a carbon fiber bundle heat transfer coefficient, in w / m 2 A is a carbon fiber bundle arrangement surface area, in m 2 T is a temperature required for the concrete member, in °C, t is an ambient temperature, in °C, m is a mass of the concrete member, in kg, c is a specific heat capacity of the concrete, in J / (kg °C), T 始 is an initial temperature of the concrete member, in °C, Δt is a time required for the temperature increase, in s, and a is a correction coefficient; In the rapid manufacturing stage, 3-4 times of the maintenance power is adopted for rapid heating, and in the cold region maintenance stage, 1-2 times of the maintenance power is adopted for rapid heating; The temperature control device comprises a temperature collection module and a voltage and current control module; The temperature collection module is connected with the voltage and current control module, and the voltage and current control module is further connected with the power supply cable; The temperature collection module is used for collecting the ambient temperature in real time, and the voltage and current control module is used for controlling the temperature of the carbon fiber heating group during electric heating by adjusting the size of the input voltage and current of the carbon fiber heating group according to the ambient temperature; The temperature collection module comprises a temperature measurement line, and the temperature measurement line comprises a metal head close to the surface of the concrete model, and the metal head is used for collecting the ambient temperature in real time; The electrodes are connected with the strip-shaped carbon fiber bundle and the power supply cable in the form of high-conductivity graphite glue; the material of the strip-shaped carbon fiber bundle is an epoxy resin-carbon fiber bundle composite material; the connection part of the strip-shaped carbon fiber bundle and the power supply cable is wrapped with an epoxy resin layer, and the surface of the epoxy resin layer is further wrapped with a heat shrink tube; The carbon fiber heating group is tied on the steel mesh, four concrete pads are uniformly distributed in the concrete model, the steel mesh with the tied carbon fiber heating group is placed on the concrete pads, and the carbon fiber heating group is ensured to be 20mm away from the lower surface of the concrete model; the temperature measuring line is fixed on the steel mesh, and the metal head of the temperature measuring line is ensured to be within 20mm away from the surface of the concrete model; The high reflectivity plate is arranged on the upper surface of the concrete member and is arranged opposite to the carbon fiber heating group, and the high reflectivity plate is used for reflecting the heat generated by the carbon fiber heating group; the material of the high reflectivity plate is polyurethane-carbon fiber composite material; in the cold region maintenance stage, the concrete member is placed reversely, and the high reflectivity plate is located on the lower surface of the concrete member.

2. The concrete precast component curing-maintaining integrated electric heating system according to claim 1, characterized in that, The concrete member is rapidly cured and demolded to form a single finished product, and a 0.5mm-2mm thick graphite-based thermal conductive coating or graphene thermal conductive coating is arranged on the surface close to the carbon fiber heating group.

3. The concrete precast component curing-maintaining integrated electric heating system according to claim 1, characterized in that, The first temperature interval is 45-55℃, and the second temperature interval is 40-50℃.

4. A concrete prefabricated component curing-maintenance integrated electric heating method, applied to a rapid manufacturing stage and a cold region maintenance stage of a concrete component, the rapid manufacturing stage being a stage of curing the concrete component after concrete pouring and vibrating, and the cold region maintenance stage being a stage of heating the surface of the concrete component or melting ice and snow, characterized in that, The concrete precast member curing-maintenance integrated method comprises the following steps: The rapid manufacturing stage: The poured concrete is fixed and supported and heat-insulated by using the concrete model to form the concrete member; The carbon fiber heating group is used to generate heat after being powered on to electrically heat the concrete member; The temperature control device is used to collect the ambient temperature in real time, and the temperature of the carbon fiber heating group during electric heating is adjusted according to the ambient temperature, so that the temperature of the concrete member is in the first temperature interval, and the first temperature interval is a temperature interval corresponding to the rapid curing requirement of the concrete member; The cold region maintenance stage: The carbon fiber heating group is used to generate heat after being powered on to electrically heat the concrete member; The temperature control device is used to collect the ambient temperature in real time, and the temperature of the carbon fiber heating group during electric heating is adjusted according to the ambient temperature, so that the temperature of the concrete member is in the second temperature interval, and the second temperature interval is a temperature interval corresponding to the heating or snow-melting and ice-melting requirement of the surface of the concrete member; The carbon fiber heating group comprises a plurality of parallel strip-shaped carbon fiber bundles, the two ends of the strip-shaped carbon fiber bundle are respectively connected to one end of a power supply cable through electrodes, and the other end of the power supply cable is connected to the temperature control device; The strip-shaped carbon fiber bundles inside the concrete member are powered on, the required temperature of the concrete member is reached due to the Joule heating effect and heat conduction, and the following formula is used for calculation: P = [h - A - (T - t) + m - c (T - T 始 ) / △t] - a; wherein P is power, in w, h is a carbon fiber bundle heat transfer coefficient, in w / m 2 · C, A is a carbon fiber bundle arrangement surface area, in m 2 , T is a temperature required for the concrete member, in C, t is an ambient temperature, in C, m is a mass of the concrete member, in kg, c is a specific heat capacity of the concrete, in J / (kg·C), T 始 is an initial temperature of the concrete member, in C, Δt is a time required for temperature increase, in s, and a is a correction coefficient. In the rapid manufacturing stage, 3-4 times of the maintenance power is adopted for rapid heating; in the cold region maintenance stage, 1-2 times of the maintenance power is adopted for rapid heating; The temperature control device comprises a temperature collection module and a voltage and current control module; The temperature collection module is connected to the voltage and current control module, and the voltage and current control module is further connected to the power supply cable. The temperature acquisition module is configured to acquire the ambient temperature in real time, and the voltage and current control module is configured to control the temperature of the carbon fiber heating group during electric heating by adjusting the voltage and current of the carbon fiber heating group according to the ambient temperature. The temperature acquisition module comprises a temperature measurement wire, and the temperature measurement wire comprises a metal head close to the surface of the concrete model, and the metal head is configured to acquire the ambient temperature in real time. The electrode is connected to the strip-shaped carbon fiber bundle and the power supply cable by using high-conductivity graphite glue; the strip-shaped carbon fiber bundle is made of epoxy resin-carbon fiber bundle composite material; the connection between the strip-shaped carbon fiber bundle and the power supply cable is wrapped with an epoxy resin layer, and the surface of the epoxy resin layer is further wrapped with a heat shrink tube. The carbon fiber heating group is tied on the steel mesh, and four concrete pads are uniformly distributed in the concrete model; the steel mesh with the tied carbon fiber heating group is placed on the concrete pads, so that the carbon fiber heating group is located at a distance of 20 mm from the lower surface of the concrete model; and the temperature measurement wire is fixed on the steel mesh, so that the metal head of the temperature measurement wire is located within a distance of 20 mm from the surface of the concrete model. The high-reflectivity plate is arranged on the upper surface of the concrete member and opposite to the carbon fiber heating group, and the high-reflectivity plate is configured to reflect the heat generated by the carbon fiber heating group; the high-reflectivity plate is made of polyurethane-carbon fiber composite material; and during the maintenance stage in the cold region, the concrete member is placed reversely, and the high-reflectivity plate is located on the lower surface of the concrete member.

5. A multi-module combined electric heating system, characterized in that, The concrete member according to claim 1 is used to form a concrete slab by using the plate-shaped concrete member, and a plurality of concrete slabs with embedded carbon fiber bundles are connected according to a specific circuit combination mode to form a network system for maintenance in the cold region. Each group of concrete slabs is connected in series, and a plurality of groups are connected in parallel, so that the total power consumption is reduced by optimizing the circuit design, and the maximization of energy utilization is realized. The distance between each adjacent two concrete slabs is controlled to be between 10 mm and 20 mm, and the gap is filled with modified asphalt sealant. The multi-module combined electric heating system comprises a temperature sensor embedded in each concrete slab for real-time monitoring of the temperature in the slab; and a partition control unit connected to a plurality of series-connected concrete slabs, which is responsible for heating control and data acquisition in the partition. A central control unit communicates with each partition control unit, receives temperature data, dynamically adjusts the power supply voltage and current, and realizes heating power control of each concrete slab. A power control device is connected between the central control unit and the carbon fiber heating belt to adjust the voltage and current. The multi-module combined electric heating system adopts intelligent control and partition control strategies, dynamically adjusts the heating strategy according to the real-time environment and road conditions, and optimizes energy utilization.

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