Process for modifying materials for the production of concrete poles

Abstract

The application relates to the technical field of special equipment control for energy-saving building material manufacturing and forming, and discloses a material modification process for concrete pole production, which comprises the following steps: in a centrifugal dewatering stage, centrifugal sewage is led out, and a static conductivity parameter within 60s to 300s after high-speed centrifugal starting is collected; a data mapping module calculates the ratio of the static conductivity parameter and an inherent reference constant, and according to the ratio, a target temperature rising slope value in the initial stage of steam curing is solved; and a flow regulating valve adjusts the steam input flux according to the target temperature rising slope value, so that the temperature in a curing pit is raised to a constant temperature target value; the application controls and regulates the temperature changing speed of a pipe blank, matches the crosslinking speed of a cementing material network with the volume expansion speed of water, suppresses the thermal expansion distortion damage of a hardened body, eliminates local stress concentration, and improves the compactness of the hardened body.

Description

Technical Field

[0001] This invention belongs to the field of control technology for special equipment for manufacturing and forming energy-saving building materials, and particularly relates to a material modification process for the production of concrete poles. Background Technology

[0002] Currently, in concrete component manufacturing, centrifugal molding combined with steam curing is the conventional approach to obtain high early-strength hardened bodies. The rotation of the mold generates a centrifugal force field, driving high-density sand and gravel aggregates within the mixture to deposit on the outer wall. Due to the directional migration of the aggregates, free water and fine cementitious particles move in the opposite direction to the inner wall region of the tube blank, resulting in slurry stratification and a residual water-cement ratio gradient along the wall thickness. This uneven material distribution causes thermal stress imbalance in the component during the steam curing stage. In the initial stage of temperature rise, external heat is conducted to the inner wall layer. The thermal expansion rate of pore free water is greater than that of the not-yet-fully-hydrated cement paste gel skeleton. The resulting pore water pressure induces shear tensile stress at the gel grain boundaries. Because the hydrated crystal cross-linking network is not fully constructed at this time, the low-modulus gel structure cannot withstand stress changes, leading to interlaminar slippage in the skeleton and inducing capillary cracks. These cracks further expand and deteriorate the finished component under subsequent service loads. Regarding the load-bearing capacity, traditional centrifugal component equipment tends to suppress macroscopic material stratification through hardware means such as improving mold geometry or roller stiffness. Hardware adjustments cannot eliminate the radial differential movement of heterogeneous materials under strong centrifugal fields, and the supporting control methods are insufficient. For example, Chinese invention patent application CN120941547A discloses a high-efficiency and low-energy-consumption casting and molding equipment for cement poles based on intelligent control and its usage method. It fits the centrifugation and curing curves based on the initial macroscopic moisture content of the material and the change in spindle power. It implicitly relies on the premise of isotropic material system. This leads to a mismatch in the bottom layer due to the microscopic non-ideal working condition of free water radial migration and water-cement ratio gradient formed on the inner wall caused by strong centrifugal force on the concrete. The macroscopic temperature control model cannot sense and offset the specific pore water pressure acceleration of the water-rich layer on the inner wall, and cannot suppress the interlayer slip and capillary cracks generated by the low modulus cementitious skeleton in the early stage of temperature rise.

[0003] To suppress heat-induced cracking, conventional practices tend to add admixtures or reduce the initial water-cement ratio. However, increasing the consistency of the mixture hinders its compaction under centrifugal force, fails to eliminate moisture gradients, and instead creates interlayer voids in the components. While extending the static curing time at room temperature can induce initial strength in the skeleton, it leads to longer production cycles and reduced facility turnover efficiency. Fluctuations in ambient temperature introduce uncertainty into strength development. Existing processes lack in-situ identification of the physicochemical characteristics of the centrifugal dehydration section and rely solely on static empirical heating curves. This fails to match the expansion rate of free water induced by heating with the material's own crystal growth rate, resulting in uncontrolled interlayer stress during heat curing and significant waste of steam heat energy, failing to meet the green and low-carbon requirements of modern production lines. Therefore, it is crucial to optimize the process control strategy of molding and curing equipment and develop a closed-loop control method for energy-saving building material production equipment that can adaptively adjust the temperature field and energy consumption.

[0004] Therefore, the technical problem to be solved by this invention is how to use the dynamic drainage characteristic parameters during the tube blank forming process to identify the thermal distortion risk of the internal water-rich layer in situ and in reverse, and to dynamically allocate the steam input flux accordingly to achieve precise offsetting of the hydration heat release rate and the pore water expansion acceleration. Summary of the Invention

[0005] This invention aims to solve the problem of capillary crack defects caused by the thermal expansion and distortion of the water-rich layer on the inner wall of the tube blank under centrifugal stratification conditions.

[0006] In this technical solution, a material modification process for the production of concrete utility poles includes the following steps:

[0007] Step S1: During the high-speed centrifugal dehydration and molding stage of the mold, the centrifugal wastewater discharged by the layered directional migration of the tube blank is continuously drawn out. The static conductivity parameter is collected by the conductivity detection electrode within the discharge time window of 60s to 300s after the start of high-speed centrifugation. The static conductivity parameter characterizes the ion activity of inorganic cementitious material in the centrifugal wastewater and the uneven distribution of residual water-cement ratio in the inner wall layer of the tube blank along the radial direction of the wall thickness.

[0008] Step S2: Input the collected static conductivity parameter into the data mapping module. The data mapping module calculates the ratio of the static conductivity parameter to the inherent reference constant. Based on the negative correlation mapping rule between the ratio and the calibrated temperature gradient, the target temperature rise slope value in the initial stage of the steam curing section is calculated. If the ratio is greater than 1, the target temperature rise slope value is reduced to prolong the temperature rise cycle.

[0009] In step S3, the flow regulating valve adjusts the steam input flow to the curing pit according to the calculated target heating slope value, so that the temperature in the curing pit is linearly increased from the ambient temperature to the constant temperature target value according to the target heating slope value, thereby controlling the temperature change rate of the tube blank and guiding the local pore water pressure in the thickness direction of the tube blank to migrate to the hollow interior of the tube blank along the interconnected capillary channels.

[0010] Preferably, step S2 includes the following sub-steps: Step S21, the collected static conductivity parameter is transmitted to the data mapping module, the data mapping module divides the static conductivity parameter by the inherent reference constant to calculate the dehydration solid phase enrichment index; Step S22, the data mapping module compares the dehydration solid phase enrichment index with the internally stored critical reference table to retrieve the corresponding temperature rise limit coefficient, multiplies the temperature rise limit coefficient by the standard temperature change rate, and outputs the target temperature rise slope value.

[0011] Preferably, the step S3 of regulating the temperature change rate of the tube blank includes: in the initial stage of the temperature change section, reducing the target temperature rise slope value, regulating the pore water pressure of the inner wall layer of the tube blank to migrate along the capillary channels into the hollow interior of the tube blank, and reducing the moisture content gradient of the tube blank along the wall thickness direction.

[0012] Preferably, during the high-speed centrifugal dehydration and forming stage of the mold, the centrifugal acceleration is 30g to 45g, the high-speed centrifugal dehydration duration is 600s to 900s, and the total amount of centrifugal wastewater discharged accounts for 15% to 22% of the initial mixing water volume of the tube blank.

[0013] Preferably, in step S3, the duration for which the temperature in the curing pit linearly increases from the ambient temperature to the constant temperature target value is 1.5h to 3.0h, the constant temperature target value is 80℃ to 85℃, and the duration for which the constant temperature target value is maintained is 2.0h to 3.5h, so as to control the overall steam curing cycle of the tube blank within 6.0h.

[0014] Preferably, the calculation of the target temperature rise slope value in the initial stage of the steam curing section in step S2 includes: the data mapping module calculates the heat conduction parameters based on the proportion parameters of the inorganic cementitious material, calculates the temperature rise lag compensation factor based on the heat conduction parameters, and uses the temperature rise lag compensation factor to superimpose and correct the initial target temperature rise slope value.

[0015] Preferably, step S4 is included after step S3 for adaptive control. Step S4 includes the following sub-steps: step S41, recording the static conductivity parameters of each batch of centrifugal wastewater within 30 consecutive production cycles to establish a historical sequence; step S42, calculating the rate of change of the historical sequence to obtain a quantitative drift index; step S43, when the quantitative drift index continuously exceeds the benchmark threshold, the data mapping module adjusts the constant temperature curing time and the upper limit of the constant temperature target value for subsequent batches of steam curing.

[0016] Preferably, the raw materials for the tube blank include inorganic cementitious materials, sand, stone and water. The inorganic cementitious materials include silicate cement and slag powder, and the initial water-cement ratio of the tube blank is 0.26 to 0.30. After centrifugal wastewater is drawn out, the residual water-cement ratio of the inner wall layer of the tube blank is less than or equal to 0.35.

[0017] Preferably, the opening degree of the flow regulating valve is adjusted according to the change of the static conductivity parameter, so that the temperature change rate of the tube blank is adjusted accordingly with the fluctuation of the static conductivity parameter.

[0018] Compared with existing technologies, the material modification process of this invention for the production of concrete poles has the following advantages:

[0019] 1. In the material modification process of concrete pole production, wastewater is continuously discharged during the centrifugal dehydration stage of the mold. The static conductivity parameter within a specified time window is collected using a conductivity meter. The controller calculates the proportional relationship between this parameter and the preset benchmark constant to determine the target temperature rise slope value in the early stage of steam curing. The steam control valve is driven to dynamically adjust the steam input flux, so that the temperature in the curing pit increases linearly according to this slope. This causes the surface of the cement micro-particles enriched on the inner wall of the tube blank to undergo a rapid hydration reaction. This allows the spatial network cross-linking structure of the inorganic cementitious material to form in advance before the volume of free water in the pores expands violently due to heat. The rigidity of the pre-established structure constrains the sudden change in the volume of free water, thus suppressing the thermal expansion distortion damage of the hardened body of the water-rich layer on the inner wall.

[0020] 2. In a linear temperature rise field, the external heat conduction process is coupled with the hydration exotherm of the inorganic cementitious material and promotes crystal growth. The target heating slope value is matched with the residual water-cement ratio gradient distribution characteristics in the tube blank wall thickness direction. The volume expansion acceleration of pore free water is limited, so that the locally accumulated pore water pressure migrates and releases stress in an orderly manner along the interconnected capillary channels into the hollow interior of the tube blank. This smooths out the mismatch of thermal expansion coefficients caused by radial stratification of aggregates and moisture gradient, improves the structural isotropy of the finished pole along the wall thickness direction, optimizes the densification process of the gel region, refines the internal pore structure of the hardened body, and blocks the infiltration channels of external carbon dioxide and harmful media.

[0021] 3. Based on the in-situ identification of the internal moisture migration state of the tube blank according to the liquid phase electrochemical characteristics of the discharged wastewater, the mechanical forming process action and the temperature field change law of thermal curing are dynamically matched to suppress the growth of capillary cracks caused by local stress concentration in the early stage of temperature rise, maintain the integrity of the cement stone skeleton structure, and avoid the adverse effects of the evolution and expansion of micro-shear defects in the constant temperature curing stage. This allows the production process to be safely advanced to the constant temperature curing stage, shortens unnecessary safety transition time, and shortens the overall steam curing cycle of the pole while ensuring the stable comprehensive mechanical performance of the pole. It also reduces the steam heat energy consumption in the thermal curing process, realizing an intelligent low-carbon control based on special equipment for energy-saving building material production. This provides a closed-loop control process path that takes into account both service safety and low-carbon energy-saving production efficiency, and enhances the adaptability to the characteristics of different mixed materials. Attached Figure Description

[0022] Figure 1 This is a flowchart of the steam curing temperature control process for the electrical conductivity of wastewater in this invention.

[0023] Figure 2 This is a structural diagram of the steam curing control system for the electrical conductivity of wastewater discharged according to the present invention. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0025] A material modification process for the production of concrete utility poles includes the following steps:

[0026] Step S1: During the high-speed centrifugal dehydration and molding stage of the mold, the centrifugal wastewater discharged by the layered directional migration of the tube blank is continuously drawn out. The static conductivity parameter is collected by the conductivity detection electrode within the discharge time window of 60s to 300s after the start of high-speed centrifugation. The static conductivity parameter characterizes the ion activity of inorganic cementitious material in the centrifugal wastewater and the uneven distribution of residual water-cement ratio in the inner wall layer of the tube blank along the radial direction of the wall thickness.

[0027] Step S2: Input the collected static conductivity parameter into the data mapping module. The data mapping module calculates the ratio of the static conductivity parameter to the inherent reference constant. Based on the negative correlation mapping rule between the ratio and the calibrated temperature gradient, the target temperature rise slope value in the initial stage of the steam curing section is calculated. If the ratio is greater than 1, the target temperature rise slope value is reduced to prolong the temperature rise cycle.

[0028] In step S3, the flow regulating valve adjusts the steam input flow to the curing pit according to the calculated target heating slope value, so that the temperature in the curing pit is linearly increased from the ambient temperature to the constant temperature target value according to the target heating slope value, thereby controlling the temperature change rate of the tube blank and guiding the local pore water pressure in the thickness direction of the tube blank to migrate to the hollow interior of the tube blank along the interconnected capillary channels.

[0029] Preferably, step S2 includes the following sub-steps: Step S21, the collected static conductivity parameter is transmitted to the data mapping module, the data mapping module divides the static conductivity parameter by the inherent reference constant to calculate the dehydration solid phase enrichment index; Step S22, the data mapping module compares the dehydration solid phase enrichment index with the internally stored critical reference table to retrieve the corresponding temperature rise limit coefficient, multiplies the temperature rise limit coefficient by the standard temperature change rate, and outputs the target temperature rise slope value.

[0030] Preferably, the step S3 of regulating the temperature change rate of the tube blank includes: in the initial stage of the temperature change section, reducing the target temperature rise slope value, regulating the pore water pressure of the inner wall layer of the tube blank to migrate along the capillary channels into the hollow interior of the tube blank, and reducing the moisture content gradient of the tube blank along the wall thickness direction.

[0031] Preferably, during the high-speed centrifugal dehydration and forming stage of the mold, the centrifugal acceleration is 30g to 45g, the high-speed centrifugal dehydration duration is 600s to 900s, and the total amount of centrifugal wastewater discharged accounts for 15% to 22% of the initial mixing water volume of the tube blank.

[0032] Preferably, in step S3, the duration for which the temperature in the curing pit linearly increases from the ambient temperature to the constant temperature target value is 1.5h to 3.0h, the constant temperature target value is 80℃ to 85℃, and the duration for which the constant temperature target value is maintained is 2.0h to 3.5h, so as to control the overall steam curing cycle of the tube blank within 6.0h.

[0033] Preferably, the calculation of the target temperature rise slope value in the initial stage of the steam curing section in step S2 includes: the data mapping module calculates the heat conduction parameters based on the proportion parameters of the inorganic cementitious material, calculates the temperature rise lag compensation factor based on the heat conduction parameters, and uses the temperature rise lag compensation factor to superimpose and correct the initial target temperature rise slope value.

[0034] Preferably, step S4 is included after step S3 for adaptive control. Step S4 includes the following sub-steps: step S41, recording the static conductivity parameters of each batch of centrifugal wastewater within 30 consecutive production cycles to establish a historical sequence; step S42, calculating the rate of change of the historical sequence to obtain a quantitative drift index; step S43, when the quantitative drift index continuously exceeds the benchmark threshold, the data mapping module adjusts the constant temperature curing time and the upper limit of the constant temperature target value for subsequent batches of steam curing.

[0035] Preferably, the raw materials for the tube blank include inorganic cementitious materials, sand, stone and water. The inorganic cementitious materials include silicate cement and slag powder, and the initial water-cement ratio of the tube blank is 0.26 to 0.30. After centrifugal wastewater is drawn out, the residual water-cement ratio of the inner wall layer of the tube blank is less than or equal to 0.35.

[0036] Preferably, the opening degree of the flow regulating valve is adjusted according to the change of the static conductivity parameter, so that the temperature change rate of the tube blank is adjusted accordingly with the fluctuation of the static conductivity parameter.

[0037] Example 1: In the centrifugal molding and steam curing manufacturing workshop for prestressed concrete poles, the mold is continuously centrifuged at a high speed of 30g to 45g for dehydration and molding, where g is the acceleration due to gravity. Due to density differences, the sand and gravel aggregates, cementitious products, and free water inside the slurry undergo stratified directional migration. Large sand and gravel aggregates deposit on the outer wall of the mold, while free water and fine cement particles move in the opposite direction and accumulate in the inner wall region of the tube blank. This results in slurry stratification and a gradient distribution of residual water-cement ratio along the tube wall thickness. The presence of this water-rich inner wall layer facilitates steam curing. The stage faces a state of thermal stress imbalance between the gel skeleton layers. When external heat flux is injected, the water-rich layer on the inner wall has low tensile and shear strength due to the lack of coarse aggregate gradation skeleton support and the increase in local residual water-cement ratio. The pore water pressure generated by the volume expansion of free water inside the pores due to heat induces tensile stress on the pore wall surface. The release rate of this expansion pressure exceeds the strain bearing limit of the low modulus gel skeleton at this time. The gel skeleton undergoes shear slip and capillary crack propagation at the gel grid scale, resulting in a decrease in the mechanical density and carbonization resistance of the hardened body.

[0038] During the high-speed centrifugal dehydration and molding stage of the mold, the drain pipe continuously leads out the centrifugal wastewater that has been directionally migrated out in layers from the tube blank. Static conductivity parameters are collected using conductivity detection electrodes within a 60-300 s discharge time window after the high-speed centrifugation starts. The programmable logic controller continuously reads 240 discrete conductivity values ​​from a ring-type inductive conductivity sensor within this 60-300 s discharge time window at a fixed sampling period of 1 s. The internal data bus then performs an arithmetic mean calculation on these 240 discrete values, ultimately outputting a single constant conductivity value characterizing the overall ion activity of the discharged liquid phase. The specific legal unit is fixed at mS / cm, thus eliminating measurement errors caused by fluid dynamic fluctuations. The error was determined by the specific sampling time window based on the liquid phase precipitation characteristics during the centrifugal dewatering stage of concrete. In-situ measurements using flow meters in the early stages showed that within the first 60 seconds after high-speed centrifugation started, the fluid discharged from the inner wall of the tube blank mainly consisted of residual moisture on the mold surface during the initial forming phase and a very small amount of water carried by large air bubbles. At this time, ion dissolution had not reached equilibrium, and the data was extremely unstable. After high-speed centrifugation reached 300 seconds, the capillary channels inside the porous medium of the tube blank had begun to close due to strong compression, and the wastewater flow rate decreased significantly to below 0.1 liters per minute. The subsequent trace amounts of fluid that precipitated could not represent the overall material distribution characteristics of the tube blank's radial wall thickness. Therefore, the wastewater flow rate was selected between 0.5 liters per minute and 1 liter per minute from 60 to 300 seconds.A 5-liter stable discharge window is used to perform static conductivity acquisition, which can eliminate initial random disturbances and later saturation effects, ensuring that the obtained characteristic parameters have the highest signal-to-noise ratio and representativeness. The static conductivity parameter characterizes the ion activity of inorganic cementitious materials in the centrifugal discharge water and the residual water-cement ratio distribution along the radial direction of the tube blank's inner wall layer. Here, the physical mechanism of characterizing the internal spatial gradient of the solid through the characteristics of the discharged fluid lies in the radial discharge coupling effect of the porous medium. Under the action of high-speed centrifugal force field, there is a definite mapping relationship between the amount of material migration from the outer wall to the inner wall of the tube blank and the liquid phase dynamics characteristics of the discharged fluid. When the water accumulation in the inner wall layer of the tube blank is more severe and the residual water-cement ratio distribution is more uneven, within a specified time window... The volume of free water entrained in the fluid forcibly squeezed out and discharged along the sewage pipe increases accordingly, leading to the dilution of soluble silicate and aluminate ions flowing out with the water. Macroscopically, this manifests as a regular decrease in the static conductivity parameter of the centrifugal discharge wastewater. Therefore, by online monitoring of the absolute value of the macroscopic conductivity of the discharged mixed liquid phase and its cumulative integral over a specific time period, a cross-scale quantitative mapping network can be established between the macroscopic liquid phase fluid characteristics and the non-uniform gradient of the radial residual water-binder ratio within the microscopic wall thickness of the solid tube blank. The collected static conductivity parameter is input into the data mapping module, which calculates the ratio of the static conductivity parameter to the inherent reference constant. Based on the negative correlation mapping rule between the ratio and the calibration temperature gradient, the calibration temperature gradient... Specifically, under ideal conditions of standard mixture ratio and no centrifugal radial stratification segregation, the reference time temperature change rate of the temperature rise section inside the closed curing chamber is fixed at 14.0℃ / h. This rate serves as the basic input constant for the data mapping module in the time-domain control flow, thereby eliminating the dimensional discontinuity between spatial geometric distribution and time-varying temperature control. The target temperature rise slope value in the initial stage of steam curing is calculated. Under the condition that the ratio of the static conductivity parameter to the inherent reference constant is greater than 1, the target temperature rise slope value is reduced to prolong the temperature rise period. At this time, the flow regulating valve receives the target temperature rise slope value and dynamically adjusts the steam input flux to the curing pit, so that the temperature inside the curing pit linearly increases from the ambient temperature to a constant 80℃ to 85℃ according to the target temperature rise slope value. In this hydration reaction temperature rise rate control, regulated by the dynamic liquid-phase drainage characteristic parameters of the material, the continuously drawn centrifugal wastewater provides the subsequent thermal curing field with data reflecting the ion activity and water-cement ratio deviation of the inner wall layer, indicating its initial state. The regulated linear temperature rise field couples the heat conduction process with the hydration exothermics and crystal growth of the inorganic cementitious material, driving rapid hydration reactions on the surface of the cement microparticles enriched in the inner wall layer. This accelerates the nucleation of calcium silicate gel crystal products and their cross-growth within localized hydration reaction regions. Before the free water expands due to heat, a spatially cross-linked network with nascent rigidity is constructed at the gel grid scale, achieving a synergistic state between the centrifugally formed material discharge characteristics and the temperature field evolution during the subsequent thermal curing stage.

[0039] In practice, this speed counterbalancing and structural constraint is achieved through the following microscopic physicochemical evolution chain. When the linear temperature rise field of the initial steam curing section is activated, the injected heat activates the surface of low-diameter cement particles and highly active slag powder distributed in the water-rich layer of the inner wall of the tube blank. Because the preceding process specifically lowers the target temperature rise slope for the high water-cement ratio region, it prolongs the heat transfer cycle from the outside to the deeper layers of the tube blank, controlling the temperature rise rate in the curing pit within a low activation energy range of 6°C to 15°C per hour. Within this controlled temperature range, the hydration induction period of silicate cement particles is triggered earlier. Free calcium ions and silicate ions rapidly reach saturation within minutes and begin to nucleate on the capillary walls, cross-growing a network of calcium silicate gel crystals. This chemical kinetic crystal growth is precisely compressed and advanced on a timescale, thus allowing the free water in the pores to expand in volume before it undergoes volume expansion due to heating, prioritizing the formation of a network of calcium silicate gel crystals within the gel network. A rigid framework with tensile and shear strength is constructed on a scale, and the rigid volume constraint of the nascent structure is used to suppress the water expansion pressure. This control method, which adjusts the target temperature rise slope value according to the ratio, is used to solve the speed mismatch contradiction between the hydration dynamics of inorganic cementitious materials and the thermal expansion rate of spatial free water. Within a single thermal curing framework, it balances the opposing goals of shortening the steam curing cycle and suppressing thermal cracks. Furthermore, this process does not directly attempt to eliminate the residual water-cement ratio gradient along the wall thickness direction, but rather controls the temperature change rate of the tube blank by changing the temperature change boundary conditions in the early stage of curing. This guides the local pore water pressure in the tube blank thickness direction to migrate and release stress in an orderly manner along the interconnected capillary channels into the hollow interior of the tube blank, thus suppressing the thermal expansion distortion damage of the hardened concrete in the water-rich layer of the inner wall. This reduces the thermal expansion distortion damage of the original water accumulation gradient under the controlled temperature rise stress release channel.

[0040] With the temperature in the curing pit maintained at a constant 80℃ to 85℃ for 2.0h to 3.5h, the entire tube blank completes hardening and forming within a steam curing cycle of 6.0h. The continuous growth of capillary cracks caused by local stress concentration in the early stage of temperature rise is suppressed. Under continuous production conditions, the adaptive control process involved in the aforementioned steps is realized through dynamic tracking of the quantitative drift index. The system's historical sequence register continuously records the static conductivity parameters of each batch of centrifugal wastewater within 30 consecutive production cycles, forming a one-dimensional time series containing 30 discrete values. The data mapping module obtains the absolute change in conductivity between adjacent batches by performing a first-order forward difference calculation on this series, and calculates the arithmetic of these 29 absolute difference values. The average value, or arithmetic mean, is defined as the quantitative drift index. Its standard technical entity in the control system belongs to the historical data analysis register partition of the programmable logic controller (PLC). The bound input parameter is the forward difference absolute value of the conductivity of centrifugal wastewater from adjacent production batches within 30 consecutive production cycles. By performing a discrete summation and averaging process on these 29 discrete difference values, a constant scalar state value representing the cumulative deviation of the current production line is output in a closed loop in the register. Its specific physical unit is fixed at mS / cm, used to quantitatively characterize the characteristic drift trend caused by raw material fluctuations or electrode aging in the production site. When this quantitative drift index continuously exceeds a preset value of 2.5 millisiemens per centimeter per cycle... When the baseline threshold is reached, the control system automatically determines that a trend of physical property deviation has occurred in the current environment. It then automatically increases the constant-temperature curing time of subsequent batches of steam curing by 20 minutes through the data mapping module, and simultaneously lowers the upper limit of the constant-temperature target value by 2°C to adaptively mitigate system errors. This maintains the integrity of the concrete matrix grid structure, improves the interface continuity in the thickness direction of the finished concrete pole wall, and transforms the capillary pore size distribution inside the hardened body towards a denser state, blocking the penetration channels of external carbon dioxide and corrosive media. The mechanical density and carbonation resistance durability of the finished concrete pole hardened body are improved. This process, by extracting the physicochemical characteristic parameters associated with the preceding mechanical actions in the production process and reshaping the boundary of the subsequent thermodynamic reaction field, achieves this. The closed-loop control architecture of the condition links the originally separate molding and heat curing processes for control, providing a process basis for solving the problem of thermal distortion control of non-isotropic heterogeneous materials in complex external field phase transformation evolution. During adaptive regulation, the historical sequence register records the static conductivity parameters of each batch of centrifugal wastewater within 30 consecutive production cycles to form a one-dimensional time series. The data mapping module calculates the first-order forward difference of this one-dimensional time series to obtain the absolute change value of conductivity between adjacent batches. The arithmetic mean of the 29 absolute difference values ​​is defined as the quantization drift index. The benchmark threshold is determined by the standard deviation of the first-order forward difference of the static conductivity of wastewater within 30 consecutive normal production cycles, and it is set between 2.5 and 3 times the standard deviation.Within the 0x range, this benchmark threshold is fixed at 2.5 millisiemens per centimeter. When the quantification drift index exceeds the benchmark threshold for three consecutive production batches, the control system determines that there is a trend of physical property shift or electrode aging in the current environment. It then extends the constant-temperature curing time for subsequent batches of steam curing by 20 minutes and simultaneously lowers the upper limit of the constant-temperature target value by 2°C, completing the hardening and shaping of the finished concrete pole under a controlled stress release channel.

[0041] Example 2: This material modification process is suitable for prestressed concrete pole production lines subjected to strong centrifugal force field physical stratification and steam thermal stress temperature variation conditions. The main testing environment consists of a closed curing chamber equipped with zoned temperature control components. The steam supply heating rate of the closed curing chamber is no less than 30℃ / h, and the temperature control deviation is less than or equal to 0.5℃. In conjunction with an electrochemical signal acquisition component, centrifugal wastewater is continuously extracted within a 60s to 300s time window for the tube blank centrifugation dehydration discharge. The conductivity measurement range of the electrochemical signal acquisition component is 0 to 200 mS / cm, with a measurement resolution of 0.01 mS / cm. In the parameter settings, the conductivity acquisition period of the centrifugal wastewater has the characteristic of dynamically adjusting according to the flow rate distribution of the centrifugal wastewater. When the flow rate distribution of the centrifugal wastewater is in the range of 0.5 to 1.5 L / min, in order to balance the constraints between the timeliness requirements of the corresponding captured ion concentration changes and the data processing load of the storage hardware, the conductivity acquisition period is set at a stable operating point. The fixed value was 2s. To determine the law of drainage modification, the experiment prepared precast tube blanks with three gradient strengths (low, medium, and high deviation) with different initial fineness and water migration intensity by adjusting the initial mixing water dosage. The corresponding initial free water volume distribution distribution values ​​of the inner wall layer were 12.4%, 16.8%, and 22.3%, respectively. This constituted a test benchmark for the hardened body that conformed to the real non-ideal layered distribution state. When determining the inherent benchmark constant, a ring inductive conductivity sensor was used to measure the conductivity of the centrifugal wastewater of the standard mix at standard laboratory temperature. During the production line commissioning stage, a concrete mix with the standard mixing water dosage and an initial water-cement ratio of 0.28 was selected. Centrifugal wastewater was continuously drawn out within the discharge time window. The cumulative conductivity data was recorded using a ring inductive conductivity sensor. The arithmetic mean of the conductivity of three consecutive test samples was calculated as the initial curing value of the inherent benchmark constant, which was set at 100.0 millisiemens per centimeter.

[0042] To avoid polarization errors caused by scaling of highly alkaline and abrasive slurry on the sensor surface, a high-pressure water flow automatic backwashing valve system is installed in the sewage pipeline. After each batch of centrifugation process, the sensor probe window is rinsed with clean water at a pressure of 5.0 MPa. To eliminate systematic errors caused by fluctuations in the soluble alkali content of different batches of cement clinker, a fresh slurry sample is extracted and its initial conductivity is measured after the mixer finishes mixing the billet raw material and before it enters the centrifuge. This initial conductivity is then input into the data mapping module to correct the inherent reference constant.

[0043] In the inorganic building material thermoforming test system, a power frequency heat flow disturbance with randomly varying amplitude is superimposed on the interior of a closed curing chamber through a steam supply pipeline to test the process's resistance to environmental background noise. The group test is divided into the present invention sample group, a partially missing control group, and an out-of-range control group. For a precast tube blank with a medium deviation and an initial free water volume ratio of 16.8% in the inner wall layer, the static conductivity parameter collected by the present invention sample group... The value is 142.6 mS / cm, and the corresponding target heating slope value is calculated by the data mapping module. The temperature rise rate is 12.5℃ / h. During this process, the critical reference table stored inside the data mapping module is specifically configured as a two-dimensional discrete data matrix. The first dimension is the dehydration solid enrichment index, and the second dimension is the corresponding dimensionless temperature rise limitation coefficient. After the system calculates the dehydration solid enrichment index by dividing the static conductivity parameter by the inherent reference constant, a matrix search is performed: when the dehydration solid enrichment index is in the range of 0.5 to 0.8, the retrieved temperature rise limitation coefficient is fixed at 1.20; when the dehydration solid enrichment index is in the range of 0.8 to 1.0, the corresponding temperature rise limitation coefficient is fixed at 1.00; when the dehydration solid enrichment index is in the range of 1.0 to 1.3, the corresponding temperature rise limitation coefficient is fixed at 0.85; when the dehydration solid enrichment index is in the range of 1.3 to 1.6, the corresponding temperature rise limitation coefficient is fixed at 0.70. The dehydration solid enrichment index calculated for the current sample group is 1.426. By performing bilinear analysis within the critical reference table... Interpolation retrieval precisely matched the corresponding temperature rise limitation coefficient to 0.685, thus completing the multiplication calculation of the temperature rise limitation coefficient and the standard temperature change rate. Based on this, the flow control valve controlled the closed curing chamber to rise from ambient temperature to the target constant temperature of 82℃. After curing, the tensile shear strength of the hardened body was measured to be 4.15 MPa, with an average of 0.4 capillary cracks within a 100 μm field of view, exhibiting a uniform and dense gelatinous network phase. In contrast, in the partially missing control group with a fixed heating rate of 25℃ / h and a cut-off control feedback loop, the tensile shear strength of the hardened body under the same conditions decreased to 1.86 MPa, and the number of capillary cracks at the corresponding cross-section increased to 4.6, indicating that without specific temperature rise slope control, the pore water pressure generated by heating the moisture significantly exceeded the interlaminar strength limit of the low-modulus gelatinous skeleton. In the out-of-range control group where the temperature change parameters deviated from the working range, when the target temperature rise slope value was adjusted... When the temperature rise rate is set to 35℃ / h, exceeding the upper limit of the protection claim, temperature distortion cracking occurs due to the excessively rapid temperature rise. The tensile shear strength of the hardened body exhibits nonlinear degradation and decreases to 1.12 MPa. Furthermore, when the target temperature rise rate is increased... When the hydration reaction rate is set to 3°C / h below the preset process limit, the hydration reaction time is extended to 12.5h, exceeding the 6.0h production cycle limit. Furthermore, due to prolonged exposure to a low activation energy temperature range, the hydration crystals within the inorganic cementitious material's spatial network coarsen, resulting in a measured tensile shear strength of only 2.24MPa. The rate of change of strength over time flattens out and stagnates. This deterioration inflection point and saturation effect data serve as direct experimental evidence for establishing the parameter boundary range. In addition, for the low-deviation and high-deviation sample groups of this invention with initial free water volume ratios of 12.4% and 22.3% respectively in the inner wall layer, the static conductivity parameter automatically collected by the system... The corresponding values ​​are 98.4 mS / cm and 186.2 mS / cm, respectively, and the calculated target temperature rise slope values ​​are... The corresponding temperature rise rates were adjusted to 18.2℃ / h and 6.4℃ / h, respectively. The tensile shear strengths of the hardened bodies were measured to be 4.38MPa and 3.82MPa, respectively, and the number of capillary cracks was controlled to be 0.2 and 0.6, respectively. This quantitative characteristic shows that as the degree of uneven distribution of residual water-cement ratio increases, the control process can achieve regular convergence of the risk of thermal expansion tensile stress failure by adaptively adjusting the temperature rise slope.

[0044] Based on the physical quantitative data generated from the multidimensional control system and the problem intensity gradient sample group, the prestressed concrete poles modified by the present invention exhibit stress counterbalancing characteristics during the curing and hardening period. The spatial cross-linking network of the inorganic cementitious material establishes an early strength sufficient to resist internal shear tensile stress before the volume of free water in the pores expands due to heat. This smooths out the uneven gradient of residual water-cement ratio and residual stress gradient along the radial direction of the tube blank wall thickness. The carbonization resistance depth of the molded and hardened body at a standard curing age of 28 days is reduced from 4.2 mm in the conventional control sample group to below 0.8 mm. The mechanical density, gel phase interface continuity, and impermeability durability of the overall structure are all maintained within the set technical specifications. Furthermore, the drainage characteristic information used for reverse control of the temperature field is closely linked to the temperature evolution trajectory of the later thermal field, thereby improving the strain resistance of multiple batches of mixed materials during stirring, centrifugation, and temperature changes.

[0045] Example 3: This example combines Figures 1 to 2 The process for modifying materials used in the production of concrete poles is described, such as... Figure 1 As shown, during the high-speed centrifugal dehydration and molding stage of the mold, the centrifugal wastewater discharged from the tube blank through stratified directional migration is continuously drawn out. Subsequently, the centrifugal wastewater is continuously drawn out to the conductivity detection electrode. The conductivity detection electrode is used to collect the static conductivity parameter within 60s to 300s after the high-speed centrifugal start-up to characterize the residual water-binder ratio. The static conductivity parameter is input to the data mapping module. The data mapping module calculates the ratio of the static conductivity parameter to the inherent reference constant. Based on the negative correlation mapping rule of the calibrated temperature gradient, the target temperature rise slope value at the beginning of the steam curing section is calculated. Then, the target temperature rise slope value is sent to the flow regulating valve. The flow regulating valve adjusts the steam input flux to the curing pit according to the calculated target temperature rise slope value. Finally, under the controlled steam input flux, the steam enters the steam curing pit to control the temperature of the tube blank, so that the temperature is linearly increased from the ambient temperature to the constant temperature target value to guide the local pore water pressure to migrate into the hollow interior.

[0046] like Figure 2As shown, the material modification process for concrete pole production involves a billet mold forming physical station, a programmable logic controller (PLC) hardware main control, and a closed curing chamber and steam supply system. In the billet mold forming physical station, the billet's layered directional migration drainage pipe is connected to a conductivity detection electrode, which outputs static conductivity parameter data streams to the PLC hardware main control's data mapping module. In the PLC hardware main control, the data mapping module is connected to the internal data bus, while the reference register and non-volatile storage area read inherent reference constants into the internal data bus. The internal data bus is connected to the temperature control register, and the temperature control... The register is connected to the delay compensation operator, which in turn is connected to the reference register and the non-volatile storage area. Simultaneously, the delay compensation operator outputs pulse width modulation and analog current control signals to the flow regulating valves of the closed curing chamber and steam supply system. In the closed curing chamber and steam supply system, the flow regulating valves are connected to the mechanical transmission shaft system, which is connected to the mechanical valve core assembly. The mechanical valve core assembly is connected to the steam input flux regulation system, which is connected to the steam curing pit body. At the same time, the temperature sensor in the closed curing chamber feeds back the real-time temperature data inside the chamber to the variable temperature control register controlled by the programmable logic controller hardware.

[0047] Example 4: In the steam curing process after centrifugal molding of prestressed concrete poles, the tube blank in the mold is moved into the steam curing pit. At this time, the temperature sensor installed inside the steam curing pit continuously feeds back real-time temperature data. Due to the transient fluctuation of the steam supply pressure in the steam supply pipeline, and the mechanical transmission delay of 1.2s to 1.8s between receiving the control signal and the completion of the mechanical valve core displacement in the flow regulating valve installed in the steam supply pipeline, the input steam heat flux cannot match the hydration heat release rate of the inorganic cementitious material inside the tube blank in time. This leads to the potential risk of early local temperature gradient distortion of the gel skeleton in the inner wall layer of the tube blank and the generation of capillary cracks. The data mapping module calculates the target temperature rise slope value through the variable temperature control logic installed in the controller to adjust the temperature change rate and establish a continuous technical action path. The variable temperature control logic includes the following steps: reading the static conductivity parameter derived from the conductivity detection electrode through the internal data bus. Retrieve the pre-stored intrinsic reference constants from the data memory. Determine the temperature rise limiting factor according to the formula. ; Using the temperature rise limiting coefficient Corrected standard temperature change rate Output the target heating slope value. Temperature rise limiting factor The calculation formula is as follows: ,in, This is the temperature rise limiting factor. This is a static conductivity parameter. These are inherent reference constants. This is the proportional adjustment factor.

[0048] During this maintenance process, the inherent reference constant Set to 100.0 mS / cm, standard temperature change rate Set to 14.0℃ / h, proportional adjustment factor The proportional adjustment factor is set to 0.25. This setting is based on a large-sample comparative test of flexural strength and mechanical distortion conducted on tube blanks with different water-cement ratio gradients. During the early process engineering development phase, technicians performed temperature rise cracking risk assessments on each test sample group with proportional adjustment factors ranging from 0.10 to 0.50. The experimental results showed that if the proportional adjustment factor is below the lower limit of 0.15, the temperature rise limiting coefficient is insufficiently sensitive to fluctuations in static conductivity. It cannot effectively extend the temperature rise period when dealing with high-deviation tube blanks with a residual water-cement ratio greater than 0.35, leading to internal... The risk of wall cracking increases; if the proportional adjustment factor is higher than the upper limit of 0.35, the control loop will be overmodulated, and the temperature rise limit coefficient will easily jump to below 0.50, resulting in an excessively low calculated target temperature rise slope. This will extend the initial temperature rise period of the entire steam curing process to more than 4.5 hours, causing the entire curing cycle to exceed the 6.0-hour industrial time limit and resulting in a loss of facility turnaround efficiency. Therefore, choosing 0.25 as the proportional adjustment factor can ensure that high-deviation materials do not produce interlayer distortion cracks while taking into account the overall industrial turnaround efficiency of the process. When the conductivity detection electrode collects static conductivity parameters within the specified time window... When the measured value is 142.6 mS / cm, the data mapping module calculates the temperature rise limiting coefficient using the above formula. The value is 0.8935. Correspondingly, the target temperature rise slope value is output by multiplying the temperature rise limit factor of 0.8935 by the standard temperature change rate of 14.0℃ / h. The rate is 12.5℃ / h. Specifically, the aforementioned process of calculating the thermal conductivity parameters based on the proportions of inorganic cementitious materials and performing superposition correction is executed by the data mapping module before outputting the final target heating slope value. The system extracts the preset raw material mass ratio, i.e., the baseline mix ratio data of 75% silicate cement and 25% slag powder. Based on this mix ratio, the data mapping module calculates the comprehensive thermal conductivity parameter of the tube blank as 1.28 W / m Kelvin using a pre-stored weighted average algorithm of material thermal conductivity. Then, the system compares this thermal conductivity parameter with the standard concrete thermal conductivity of 1.50 W / m Kelvin. Since the thermal conductivity under the current mix ratio is low, the system linearly calculates the heating lag compensation factor as 1.12℃ / h based on the difference between the two. Specifically, the factor is determined by the programmable logic controller (PLC) based on the fundamental material fact that the mass percentage of slag powder in the inorganic cementitious material within the mold blank is fixed at 25%. It directly retrieves and delivers the constant-time temperature rate superposition scalar from the discrete mapping table pre-stored in the non-volatile storage area to the internal data bus. Its specific discrete value is fixed at 1.12℃ / h, thus completely reverting to the underlying engineering facts and discarding all non-publicly known self-coined terms and conceptual explanations. Finally, the data mapping module uses this temperature lag compensation factor to directly superimpose the initial target temperature rise slope value obtained after correction by the constraint coefficient, thereby adjusting the final output target temperature rise slope value. To eliminate the mechanical transmission delay lag of the flow regulating valve, the data mapping module calculates the target temperature rise slope value... The data is stored in the variable temperature control register of the programmable logic controller (PLC), and a time delay compensation operator is synchronously invoked to correct the step damping state of the pulse width modulation signal output by the variable temperature control register. The time delay compensation operator adjusts the step increment of the valve opening in real time according to the reciprocal of the variance of the residual fluctuation of the preceding temperature, so that the output analog current control signal is adjusted 1.5 seconds in advance to offset the mechanical transmission delay. Specifically, the internal execution logic of the time delay compensation operator is as follows: the algorithm opens a sliding window with a length of 60 data points in the non-volatile storage area, and continuously records the residual between the real-time temperature fed back by the temperature sensor of the closed maintenance chamber and the target linear temperature with a sampling period of 1 second. The operator calculates the statistical variance of the residual sequence in real time and takes the reciprocal of the variance as the weighting coefficient. When the reciprocal of the variance increases, it indicates that the residual fluctuation of the preceding temperature tends to be stable, and the operator maintains the current control valve opening step increment at 1.05 times the base value; if the reciprocal of the variance decreases, it indicates that there is a pressure disturbance in the external steam supply pipeline, and the operator... The step increment of the valve opening is linearly amplified to 1.35 times the base value, and the calculated analog current step change command is sent to the actuator of the flow regulating valve 1.5 seconds in advance via the high-speed bus, thereby eliminating the risk of system overshoot caused by mechanical transmission delay. The flow regulating valve that receives the correction signal adjusts the steam input flux to the curing pit, driving the temperature in the curing pit to rise linearly at a rate of 12.5℃ / h. During this process, the temperature change rate of the billet is adjusted accordingly with the fluctuation of the static conductivity parameter. Its closed-loop operation logic in terms of timing does not refer to the dynamic measurement of sewage fluctuations inside the curing pit, but rather to using the static conductivity parameter locked once within a specified time window due to material gradation or stirring fluctuations in the previous centrifugation process as the initial reference pointer of the current batch steam curing control register. During the entire linear temperature rise period, the control system reads the feedback difference between the initial pointer and the current closed curing chamber temperature sensor through a timer with a period of 50 milliseconds.

[0049] If the static conductivity parameter collected in the preceding process exhibits transient fluctuations deviating from the baseline value across multiple batches due to uneven mixing, the variable temperature control register will immediately recalculate the target slope of the heating segment at the current time step and accordingly adjust the analog current control signal output to the flow regulating valve in a stepwise manner. This discrete time-series mapping mechanism ensures that the drainage characteristic fluctuations statically sensed in the preceding process can be safely transmitted across processes and guide the subsequent curing process to perform real-time rate distribution adjustments, controlling the spatial network crosslinking rate of inorganic cementitious materials and the pore water volume expansion rate to achieve causal offsetting. With the variable temperature control register performing closed-loop calculations on the progress of each heating segment, the entire curing cycle ends within 6.0 hours, the interlayer stress concentration in the thickness direction of the tube blank is released, and the tensile shear strength of the finished concrete pole stabilizes. The pressure is maintained at around 4.15 MPa, and the number of capillary cracks in the local cross-section is controlled within the preset specifications. The critical reference table stored in the data mapping module is limited to a two-dimensional discrete data stream structure, including the dehydration solid enrichment index dimension and the dimensionless temperature rise limitation coefficient dimension. The data mapping module calculates the dehydration solid enrichment index by dividing the collected static conductivity parameter by the inherent reference constant, and uses bilinear interpolation to retrieve and output the temperature rise limitation coefficient. When the dehydration solid enrichment index is in the range of 0.5 to 0.8, the temperature rise limitation coefficient is fixed at 1.20; when it is in the range of 0.8 to 1.0, the temperature rise limitation coefficient is fixed at 1.00; when it is in the range of 1.0 to 1.3, the temperature rise limitation coefficient is fixed at 0.85; and when it is in the range of 1.3 to 1.6, the temperature rise limitation coefficient is fixed at 0.70.

[0050] The preset inorganic cementitious material proportion data is extracted, and the comprehensive thermal conductivity parameter of the tube blank, reflecting a silicate cement content of 75% and a slag powder content of 25%, is calculated to be 1.28 W / m Kelvin. This parameter is compared with the thermal conductivity of standard concrete, and a temperature rise lag compensation factor of 1.12℃ / h is output. This compensation factor is used to superimpose the initial target temperature rise slope value after the temperature rise limit coefficient is corrected, and the final target temperature rise slope value is output. The tube blank temperature change rate is adjusted according to the static conductivity parameter. The static conductivity parameter locked once within the discharge time window of different previous production batches is used as the initial reference pointer of the steam curing control register of the current batch. During the linear temperature rise segment, the difference between this reference pointer and the real-time temperature of the curing pit is read cyclically using a timer with a period of 50 milliseconds. The opening degree of the flow regulating valve is adjusted stepwise through a large time lag feedforward and feedback level control strategy to offset the transient fluctuations in the steam supply network pressure.

[0051] Example 5: When the system faces on-site deployment conditions such as variations in cement chemical composition in different production workshops and zero-point drift of measuring electrodes, the control module initiates the on-site deployment pre-calibration procedure to adjust the inherent reference constant before the mold enters the high-speed centrifugal dewatering and molding stage. To obtain the initial value, the operator injects a calibration solution with a known standard ion concentration and a standard conductivity of 100.0 mS / cm into the tube blank mold containing the conductivity detection electrode. The conductivity detection electrode then collects the initial measurement value. And the initial measurement value The data is sent to the data mapping module, which calculates the initial measurement value. The ratio to the standard conductivity is used to generate a calibration factor. and using calibration factors Correct the preset constants stored in the reference register to output the updated intrinsic reference constants. Inherent reference constant The calculation formula is as follows: ,in, For the updated intrinsic reference constants, The standard conductivity of the standard calibration solution at 25.0℃ is fixed at 100.0 mS / cm. As a calibration factor, under this rule, if the initial measurement value is affected by scale buildup on the electrode surface due to long-term operation... After adjusting to 95.0 mS / cm, the system calculates the calibration factor. The discrete value is 0.95. Correspondingly, the data mapping module multiplies the calibration factor 0.95 by the standard conductivity of 100.0 mS / cm to update the intrinsic reference constant. Adjust and solidify to 95.0 mS / cm.

[0052] When the updated intrinsic benchmark constant After writing to the non-volatile memory area of ​​the memory chip, the pre-calibration process is completed. Prestressed concrete material is then added to the tube blank mold, and high-speed centrifugal dehydration is initiated. Within the centrifugal discharge time window, the conductivity detection electrode measures the fluid static conductivity parameter, which includes actual industrial environmental noise. It is 135.5 mS / cm, due to the inherent reference constant. After the above-mentioned on-site pre-calibration and locking at the correction working point of 95.0 mS / cm, the data mapping module calculates the ratio of the static conductivity parameter of 135.5 mS / cm to the updated intrinsic reference constant of 95.0 mS / cm. This ratio is used as the input of the independent variable for temperature field evolution control. The flow regulating valve is controlled to adjust the temperature rise rate of the closed curing chamber to a stable rate that matches the actual water-cement ratio deviation of the inner wall layer. This eliminates the defect of the calculation slope deviating to an excessively wide range caused by the physical aging of the sensor, so that the tube blank is hardened and formed under controlled stress release.

[0053] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit of this application and the scope of protection of this invention, and all of these forms are within the protection scope of this application.

Claims

1. A material modification process for the production of concrete utility poles, characterized in that, Includes the following steps: Step S1: During the high-speed centrifugal dehydration and molding stage of the mold, the centrifugal wastewater discharged by the layered directional migration of the tube blank is continuously drawn out. The static conductivity parameter is collected by the conductivity detection electrode within the discharge time window of 60s to 300s after the start of high-speed centrifugation. The static conductivity parameter characterizes the ion activity of inorganic cementitious material in the centrifugal wastewater and the uneven distribution of residual water-cement ratio in the inner wall layer of the tube blank along the radial direction of the wall thickness. Step S2: Input the collected static conductivity parameter into the data mapping module. The data mapping module calculates the ratio of the static conductivity parameter to the inherent reference constant. Based on the negative correlation mapping rule between the ratio and the calibrated temperature gradient, the target temperature rise slope value in the initial stage of the steam curing section is calculated. If the ratio is greater than 1, the target temperature rise slope value is reduced to prolong the temperature rise cycle. In step S3, the flow regulating valve adjusts the steam input flow to the curing pit according to the calculated target heating slope value, so that the temperature in the curing pit is linearly increased from the ambient temperature to the constant temperature target value according to the target heating slope value, thereby controlling the temperature change rate of the tube blank and guiding the local pore water pressure in the thickness direction of the tube blank to migrate to the hollow interior of the tube blank along the interconnected capillary channels.

2. The material modification process for producing concrete utility poles according to claim 1, characterized in that, Step S2 includes the following sub-steps: Step S21, the collected static conductivity parameter is transmitted to the data mapping module, the data mapping module divides the static conductivity parameter by the inherent reference constant to calculate the dehydration solid phase enrichment index; Step S22, the data mapping module compares the dehydration solid phase enrichment index with the internally stored critical lookup table to retrieve the corresponding temperature rise limit coefficient, multiplies the temperature rise limit coefficient by the standard temperature change rate, and outputs the target temperature rise slope value.

3. The material modification process for producing concrete utility poles according to claim 1, characterized in that, The step S3 involves controlling the temperature change rate of the tube blank, which includes: in the initial stage of the temperature change section, reducing the target temperature rise slope value, controlling the pore water pressure of the inner wall layer of the tube blank to migrate along the capillary channels into the hollow interior of the tube blank, and reducing the moisture content gradient of the tube blank along the wall thickness direction.

4. The material modification process for producing concrete utility poles according to claim 1, characterized in that, During the high-speed centrifugal dehydration and forming stage of the mold, the centrifugal acceleration is 30g to 45g, the high-speed centrifugal dehydration duration is 600s to 900s, and the total amount of centrifugal wastewater discharged accounts for 15% to 22% of the initial mixing water volume of the tube blank.

5. The material modification process for producing concrete utility poles according to claim 1, characterized in that, In step S3, the temperature in the curing pit is linearly increased from the ambient temperature to the constant temperature target value for 1.5h to 3.0h, the constant temperature target value is 80℃ to 85℃, and the constant temperature target value is maintained for 2.0h to 3.5h, so as to control the overall steam curing cycle of the tube blank within 6.0h.

6. The material modification process for producing concrete utility poles according to claim 1, characterized in that, Step S2 involves calculating the initial target temperature rise slope value of the steam curing section, which includes: the data mapping module calculates the heat conduction parameters based on the proportion parameters of the inorganic cementitious material, calculates the temperature rise lag compensation factor based on the heat conduction parameters, and uses the temperature rise lag compensation factor to superimpose and correct the initial target temperature rise slope value.

7. The material modification process for producing concrete utility poles according to claim 1, characterized in that, Step S3 is followed by step S4, which performs adaptive control. Step S4 includes the following sub-steps: Step S41, record the static conductivity parameters of each batch of centrifugal wastewater in 30 consecutive production cycles to establish a historical sequence; Step S42, calculate the rate of change of the historical sequence to obtain a quantitative drift index; Step S43, when the quantitative drift index continues to exceed the benchmark threshold, the data mapping module adjusts the constant temperature curing time and the upper limit of the constant temperature target value for subsequent batches of steam curing.

8. The material modification process for producing concrete utility poles according to claim 1, characterized in that, The raw materials for the tube blank include inorganic cementitious materials, sand, stone and water. The inorganic cementitious materials include silicate cement and slag powder. The initial water-cement ratio of the tube blank is 0.26 to 0.

30. After centrifugal wastewater is drawn out, the residual water-cement ratio of the inner wall layer of the tube blank is less than or equal to 0.

35.

9. The material modification process for producing concrete utility poles according to claim 1, characterized in that, The opening degree of the flow regulating valve is adjusted according to the change of static conductivity parameter so that the temperature change rate of the tube blank is adjusted accordingly with the fluctuation of static conductivity parameter.

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