A method for testing rheological properties of concrete, applications and feedback control system

Abstract

The present application relates to the technical field of building engineering, and discloses a concrete rheological property testing method, application and feedback control system, the method measures the torque and rotating speed data of concrete through a rheometer, iteratively calculates the yield stress and plastic viscosity in combination with the Huba model, and innovatively proposes a shear work parameter SWI to comprehensively represent the fluidity of concrete, realizes self-adaptive adjustment of the vibration duration, and the feedback control system comprises a rheometer, a sensor module, a control host and a vibrating device, and supports remote wireless control.The present application solves the problem of inconsistent multi-index evaluation of traditional rheological parameters, optimizes the vibrating process through a single SWI parameter, improves the concrete compactness and construction efficiency, and the repeated test deviation is less than 5%, thereby verifying the reliability and engineering applicability of the method.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, and in particular to a concrete rheological property testing method, application and feedback control system. BACKGROUND

[0002] Good concrete workability is the basic prerequisite for the smooth progress of concrete engineering construction, and is an important condition for ensuring that hardened concrete has excellent homogeneity, mechanical properties and durability, and is crucial to ensuring the quality of concrete structure engineering. Fluidity is an important part of concrete workability, and how to prepare concrete with excellent fluidity has always been a concern for practitioners in the construction industry. Traditional testing methods can usually only describe fresh concrete from a single perspective, often referred to as the "single-point method". In order to fully understand the rheological behavior of concrete, multiple tests need to be performed simultaneously from different perspectives.

[0003] Slump test is the main means of testing and characterizing the fluidity of concrete. However, slump only reflects one aspect of the fluidity of concrete, i.e. its yield stress. To fully express the fluidity of concrete, at least one parameter representing the viscosity of concrete needs to be added. G.H. Tattersall first tested the rheological properties of cement paste and cement concrete, introduced plastic viscosity into the characterization of concrete rheological properties, and believed that cement paste and concrete conform to the Bingham model. The rheometer method uses multiple parameters such as yield stress and plastic viscosity to characterize fresh concrete, overcoming the limitations of the "single-point method" which can only reflect certain aspects of the fluidity of concrete.

[0004] With the gradual deepening of research, concrete scholars have found that concrete more often conforms to non-linear models such as the H-B model and the modified Bingham model. However, there are two shortcomings to using these non-linear models to characterize concrete. First, the complex form makes it difficult to apply. Second, the physical meaning is not as simple and clear as the Bingham model.

[0005] The rheological method currently used to study concrete requires multiple parameters to characterize the performance of concrete. When the influence laws expressed by each parameter in the same rheological model are inconsistent, there is a lack of a single index for quantitative comparison of the fluidity of different concrete mixtures. SUMMARY

[0006] The present application solves the technical problems existing in the prior art and provides a concrete rheological property testing method, application of shear work parameter SWI in concrete vibrating and a concrete rheological property feedback regulation system. The present application integrates the yield stress and plastic viscosity measured by the rheological property measurement system into a new parameter, shear work parameter SWI, which provides a parameter that more comprehensively reflects the workability of concrete for concrete vibrating.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a method for testing the rheological properties of concrete, comprising the following steps:

[0008] S1. The freshly mixed concrete sample to be tested is placed in the outer cylinder of the rheometer. The inner diameter of the outer cylinder of the rheometer is R0.

[0009] S2. The torque T and rotational speed N of the mixing blades during concrete rotation are measured in real time using the torque and speed sensors of the rheometer;

[0010] S3. When the stirring blades of the rheometer rotate, the concrete inside them forms a radius of R. i A cylindrical object with a stirring blade height of h;

[0011] S4. The rheometer main unit applies multiple different stirring blade rotation speeds N and obtains the torque T at that rotation speed;

[0012] Calculate the rheological parameter SWI according to the following steps (a) to (l):

[0013] (a) Fit the relationship between variables T and N according to formula (1), and obtain the parameter G by least squares method or by software calculation. HB H HB and J;

[0014] T = G HB +H HB N J (1)

[0015] (b) Calculate the initial Herba fluid parameters and yield stress τ according to formulas (2) to (4). 0,HB Flow index n and consistency coefficient K;

[0016]

[0017] n = J (3)

[0018]

[0019] (c) Determine the critical radius R at the boundary between the stationary region and the moving region according to formula (5). p ;

[0020] R p =(T / 2πhτ) 0,HB ) 1 / 2 (5)

[0021] (d) Calculate the corrected rotational speed N obtained from the rheological parameters according to formula (6) or (7). mod , where R p ≤R oFormula (6) is used when Rp > Ro, and formula (7) is used when Rp > Ro.

[0022]

[0023]

[0024] (e) Apply formula (8) to the test speed N described in step (1) and the corrected speed N described in step (d) for the 7 groups. mod Calculate the root mean square error (RMSE);

[0025]

[0026] (f) Changing the rheological parameter τ 0,HB K, n, repeat the above steps until the rheological parameter τ with minimum RMSE is obtained. 0,HB K and n can be solved using Excel's Solver function.

[0027] (g) The initial μ value is determined using formula (9).

[0028]

[0029] Where n and K are the values ​​determined in step (f), This represents the maximum shear rate.

[0030] (h) Calculate the corrected rotational speed Ω using formula (10) or formula (11). MOD , where R p ≤R o When using formula (10), R p > When Ro is used, use formula (11);

[0031]

[0032] (i) Calculate the rotational speed Ω obtained from step (a) according to formula (12);

[0033] Ω=2πN (12)

[0034] (j) The rotational speed Ω described in step (j) and the corrected rotational speed Ω described in step (i) for the 7 groups MOD Calculate the root mean square error (RMSE).

[0035] Calculate the root mean square error (RMSE) according to formula (12);

[0036]

[0037] (k) Change the rheological parameter μ and repeat the above steps until the rheological parameter μ with the minimum RMSE is obtained. This can be achieved using the Solver function in Excel.

[0038] (l) Obtain τ using step (f) 0,HB Let τ0 be the value of μ obtained in step (k), and calculate the shear work parameter SWI according to formula (14).

[0039]

[0040] In the formula: s, ρ, and a are three preset constants. s is the shear motion distance, which can be selected according to the vibration amplitude of the vibrator; ρ is the concrete density, which is obtained from the experiment; a is the shear motion acceleration, which can be selected according to the vibration acceleration amplitude.

[0041] A concrete rheological performance feedback control system includes a rheometer as described in the above-mentioned testing method. The rheometer comprises an outer cylinder, a support plate, and a bottom cover. The outer cylinder is a cylindrical structure extending vertically. The support plate is located at the top of the outer cylinder and is snapped onto the upper edge of the outer cylinder. The bottom cover is located at the bottom of the outer cylinder and is openable and closable. When opened, the concrete contained in the outer cylinder can be released. Multiple vertically oriented anti-slip strips are evenly distributed on the inner wall of the outer cylinder to prevent contact between the concrete and the inner wall of the outer cylinder during rheometer operation. To avoid calculation errors caused by relative sliding, a motor, reducer, and coupling are sequentially arranged above the support plate from top to bottom. The motor, reducer, and coupling are connected in sequence. A stirring blade is installed inside the outer cylinder, with its shaft coaxial with the outer cylinder. The stirring blade has a cross-shaped cross-section and is detachably connected to the coupling. A hopper communicating with the interior of the outer cylinder is located on its upper edge. The hopper extends obliquely outward and is funnel-shaped, wider at the outside and narrower at the inside, to facilitate concrete loading. The inner diameter of the outer cylinder is Ro, and when the stirring blade rotates, the concrete inside forms a radius of R. i The cylindrical object has a stirring blade with a height of h.

[0042] It also includes a sensor module, which includes a torque sensor and a speed sensor; a control host module, in which the torque sensor and speed sensor are communicatively connected to the control host, transmitting the real-time measured torque T and speed N of the stirring blade during rotation to the control host, and the control host calculates the rheological parameter SWI according to steps (a) to (l) in the above test method; a feedback control module and a vibration device, in which the control host is communicatively connected to the feedback control module, the feedback control module is electrically connected to the vibration device, the control host calculates the vibration time based on the rheological parameters, and controls the vibration time of the vibration device through the feedback control module.

[0043] It also includes a remote control module. The control host and the remote control module are wirelessly connected. The remote control module remotely acquires rheological parameter data and vibration time data, and remotely controls the vibration time of the vibrating equipment through the remote control module.

[0044] A method for applying concrete rheological property testing methods to concrete vibration includes the following steps:

[0045] Establish the correspondence between SWI values ​​and vibration time t:

[0046] t = k·SWI + b (15)

[0047] Early experiments were conducted with various concrete mixes to test the actual vibration time of the two mixes and to calculate the SWI value of the concrete mixes.

[0048] Substitute multiple sets of data into formula (15) to calculate the values ​​of k and b, and determine the vibration time of the concrete to be tested by the SWI value.

[0049] Compared with the prior art, the beneficial effects of the present invention are:

[0050] The SWI rheological parameter in this invention reflects the amount of work required for concrete fluid to move a certain distance per unit area under a certain acceleration under shear force. A larger value indicates greater difficulty in accelerating the concrete, meaning poorer fluidity. In actual construction, shearing occurs during mixing, transportation, and manual transfer of concrete; therefore, this parameter reflects the ease or difficulty of a series of operations during concrete construction. The influence of plastic viscosity on SWI is related to the distance of movement, acceleration, and concrete density, while the influence of yield stress on SWI is related to the distance of movement but not to acceleration. Thus, it can be seen that the influence of yield stress and plastic viscosity on the amount of work required varies under different conditions. When using SWI for analysis, technicians can set appropriate a and s values ​​according to the application scenario. Rheological parameters can serve as a useful supplement to existing experimental methods for assessing concrete fluidity and rheological properties. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a flowchart of the concrete rheological property testing method of the present invention;

[0053] Figure 2 This is a schematic diagram of the rheometer structure of the present invention. Figure 1 ;

[0054] Figure 3This is a schematic diagram of the rheometer structure of the present invention. Figure 2 ;

[0055] Figure 4 The structural block diagram of the concrete rheological performance feedback control system of this invention.

[0056] In the diagram: 1. Outer cylinder; 2. Agitator blades; 3. Support plate; 4. Motor; 5. Reducer; 6. Coupling; 7. Anti-slip strip; 8. Bottom cover; 9. Hopper. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] like Figures 1-4 As shown, a method for testing the rheological properties of concrete includes the following steps:

[0059] S1. The freshly mixed concrete sample to be tested is placed in the outer cylinder of the rheometer. The inner diameter of the outer cylinder of the rheometer is R0.

[0060] S2. The torque T and rotational speed N of the mixing blades during concrete rotation are measured in real time using the torque and speed sensors of the rheometer;

[0061] S3. When the stirring blades of the rheometer rotate, the concrete inside them forms a radius of R. i A cylindrical object with a stirring blade height of h;

[0062] S4. The rheometer main unit applies multiple different stirring blade rotation speeds N and obtains the torque T at that rotation speed;

[0063] Calculate the rheological parameter SWI according to the following steps (a) to (m):

[0064] (a) Fit the relationship between variables T and N according to formula (1), and obtain the parameter G by least squares method or by software calculation. HB H HB and J;

[0065] T = G HB +H HB N J (1)

[0066] G HB H represents the flow resistance (N·m) of the HB-type fluid. HB The viscosity coefficient (N·m·s) of the HB type fluid.

[0067] (b) Calculate the initial Herba fluid parameters and yield stress τ according to formulas (2) to (4). 0,HB Flow index n and consistency coefficient K;

[0068]

[0069] n = J (3)

[0070]

[0071] (c) Determine the critical radius R at the boundary between the stationary region and the moving region according to formula (5). p ;

[0072] R p =(T / 2πhτ) 0,HB ) 1 / 2 (5)

[0073] (d) Calculate the corrected rotational speed N obtained from the rheological parameters according to formula (6) or (7). mod , where R p ≤R o Formula (6) is used when Rp > Ro, and formula (7) is used when Rp > Ro.

[0074]

[0075] (e) Apply formula (8) to the test speed N described in step (1) and the corrected speed N described in step (d) for the 7 groups. mod Calculate the root mean square error (RMSE);

[0076]

[0077] (f) Changing the rheological parameter τ 0,HB K, n, repeat the above steps until the rheological parameter τ with minimum RMSE is obtained. 0,HB K and n can be solved using Excel's Solver function.

[0078] (g) The initial μ value is determined using formula (9).

[0079]

[0080] Where n and K are the values ​​determined in step (f), This represents the maximum shear rate.

[0081] (h) Calculate the corrected rotational speed Ω using formula (10) or formula (11). MOD , where R p ≤R o When using formula (10), R p> When Ro is used, use formula (11);

[0082]

[0083] (i) Calculate the rotational speed Ω obtained from step (a) according to formula (12);

[0084] Ω=2πN (12)

[0085] (j) The rotational speed Ω described in step (j) and the corrected rotational speed Ω described in step (i) for the 7 groups MOD Calculate the root mean square error (RMSE).

[0086] Calculate the root mean square error (RMSE) according to formula (12);

[0087]

[0088] (k) Change the rheological parameter μ and repeat the above steps until the rheological parameter μ with the minimum RMSE is obtained. This can be achieved using the Solver function in Excel.

[0089] (l) Obtain τ using step (f) 0,HB Let τ0 be the value of μ obtained in step (k), and calculate the shear work parameter SWI according to formula (14).

[0090]

[0091] In the formula: s, ρ, and a are three preset constants. s is the shear motion distance, which can be selected according to the vibration amplitude of the vibrator; ρ is the concrete density, which is obtained from the experiment; a is the shear motion acceleration, which can be selected according to the vibration acceleration amplitude.

[0092] A concrete rheological performance feedback control system includes a rheometer as described in the above-mentioned testing method. The rheometer comprises an outer cylinder, a support plate, and a bottom cover. The outer cylinder is a cylindrical structure extending vertically. The support plate is located at the top of the outer cylinder and is snapped onto the upper edge of the outer cylinder. The bottom cover is located at the bottom of the outer cylinder and is openable and closable. When opened, the concrete contained in the outer cylinder can be released. Multiple vertically oriented anti-slip strips are evenly distributed on the inner wall of the outer cylinder to prevent contact between the concrete and the inner wall of the outer cylinder during rheometer operation. To avoid calculation errors caused by relative sliding, a motor, reducer, and coupling are sequentially arranged above the support plate from top to bottom. The motor, reducer, and coupling are connected in sequence. A stirring blade is installed inside the outer cylinder, with its shaft coaxial with the outer cylinder. The stirring blade has a cross-shaped cross-section and is detachably connected to the coupling. A hopper communicating with the interior of the outer cylinder is located on its upper edge. The hopper extends obliquely outward and is funnel-shaped, wider at the outside and narrower at the inside, to facilitate concrete loading. The inner diameter of the outer cylinder is Ro, and when the stirring blade rotates, the concrete inside forms a radius of R. i The cylindrical object has a stirring blade with a height of h.

[0093] It also includes a sensor module, which includes a torque sensor and a speed sensor; a control host module, in which the torque sensor and speed sensor are communicatively connected to the control host, transmitting the real-time measured torque T and speed N of the stirring blade during rotation to the control host, and the control host calculates the rheological parameter SWI according to steps (a) to (l) in the above test method; a feedback control module and a vibration device, in which the control host is communicatively connected to the feedback control module, the feedback control module is electrically connected to the vibration device, the control host calculates the vibration time based on the rheological parameters, and controls the vibration time of the vibration device through the feedback control module.

[0094] It also includes a remote control module. The control host and the remote control module are wirelessly connected via Wi-Fi or Bluetooth. The remote control module can remotely acquire rheological parameter data and vibration time data, and remotely control the vibration time of the vibrating equipment.

[0095] A method for applying concrete rheological property testing methods to concrete vibration includes the following steps:

[0096] Establish the correspondence between SWI value and vibration time t: t = k·SWI + b.

[0097] Example 1

[0098] Using the rheometer with the above structure, a 7-level speed gradient was used to test three different concrete types with different mix proportions. The height of the rheometer's mixing blades was h = 127 mm, and the inner diameter of the outer cylinder was Ro = 143 mm. When the mixing blades rotated, they formed a cylinder with a radius of Ri = 63.5 mm together with the concrete inside.

[0099] The mix proportions for the three types of concrete are shown in Table 1.

[0100]

[0101] Table 1. Concrete Mix Proportions

[0102] Based on actual data from the project, s, ρ, and a are determined as three preset constant values. s is the shear motion distance, which can be selected according to the vibration amplitude of the vibrator; ρ is the concrete density, which is obtained from experiments; and a is the shear motion acceleration, which can be selected according to the vibration acceleration amplitude.

[0103] s=0.0003~0.0005m, ρ=2350~2450kg / m 3 a = 10-15g

[0104] If the vibration amplitude is taken as 0.5 mm, then the distance traveled per vibration is 0.0005 m. The density ρ of concrete is typically between 2350 and 2450 kg / m³. 3 Here, the value is taken as 2400 kg / m³. 3 The actual acceleration of vibration in the project is approximately 10–15g; here we take 10g, which is 98m / s². 2 .

[0105] The experimental data of SWI values ​​for three types of concrete mix proportions are shown in Table 2.

[0106]

[0107] Table 2. Comparison of SWI value and slump flow of concrete with different mix proportions

[0108] As shown in Table 2, as the strength grade of concrete increases, the plastic viscosity of concrete gradually increases. At the same time, under the conditions of slightly decreasing slump flow and slightly increasing yield stress, the SWI value calculated by this rheological property test method continuously increases. SWI reflects the amount of work required for concrete fluid to move a certain distance per unit area under a certain acceleration under the action of shear force. The larger the value, the more difficult it is to make the concrete accelerate, that is, the worse the fluidity. This parameter SWI is negatively correlated with slump flow.

[0109] Example 2

[0110] Using the C40 concrete prepared in Example 1, three rheological parameter repeatability verification experiments were conducted according to the parameter values ​​in Example 1. The verification experiment data are shown in Table 3.

[0111] Test batch τ0(Pa) μ(Pa·s) SWI (J / m 2 ) 1 1068±9 109±2 1.81±0.019 2 1061±7 105±1 1.79±0.005 3 1073±10 106±3 1.80±0.015

[0112] Table 3. Repeatability verification data of rheological parameter tests (C40 concrete)

[0113] As shown in Table 3, the final calculated SWI values ​​of the three different batches of C40 concrete are basically consistent with small deviations, proving the reliability and consistency of the calculation method for this parameter SWI.

[0114] Example 3

[0115] Establish the correspondence between SWI value and vibration time t: t = k·SWI + b. Determine the values ​​of k and b based on the actual concrete vibration time parameters in the project. Calculate the vibration time based on the SWI values ​​of the three different concrete mixes in Example 1.

[0116] After trial operation, the SWI value of the non-vibrating concrete, which meets the requirements of yield stress not exceeding 50 Pa, plastic viscosity not exceeding 100 Pa·s, and vibration time of 0, is calculated to be 1.25 using the above test method. For another type of concrete, with yield stress of 1500 Pa and plastic viscosity of 250 Pa·s, and vibration time of 30 s, the SWI value is calculated to be 2.69. Substituting the above two sets of values ​​into the formula t = k·SWI + b, we can get k = 20.8 and b = -26.0. Then, using the formula t = 20.8SWI - 26.0, the vibration times corresponding to mix proportions 01, 02, and 03 concrete can be calculated to be 19.3 s, 11.9 s, and 6.4 s, respectively, as shown in Table 4.

[0117]

[0118] Table 4. SWI values ​​and vibration time of concrete with different mix proportions

[0119] According to the data in Table 4, the vibration time is positively correlated with the SWI value. Therefore, the vibration time of a certain type of concrete can be determined by the SWI value.

[0120] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A method for testing the rheological properties of concrete, characterized in that: The process includes the following steps: S1. Load the freshly mixed concrete sample to be tested into the outer cylinder of the rheometer. The inner diameter of the outer cylinder of the rheometer is... R 0; S2. The torque of the mixing blades during concrete rotation is measured in real time using torque and speed sensors of a rheometer. T and rotational speed N ; S3. When the stirring blades of the rheometer rotate, the radius of the concrete inside them forms a radius of... R i A cylindrical shape, with stirring blades at a height of [missing information]. h ; S4. The rheometer main unit applies multiple different rotational speeds to the stirring blades. N And obtain the torque at that speed. T ; Calculate the rheological parameter SWI according to the following steps (a) to (l): (a) Fitting the variable torque according to formula (1) T With variable speed N Relationships between them, obtaining parameters G HB 、H HB and J ; The flow resistance of HB-type fluid, in N·m. is the viscosity coefficient of the HB-type fluid, in N·m·s; T= （1） (b) Calculate the initial Herba fluid parameters and yield stress according to formulas (2) to (4). Flow Index n and consistency coefficient K ; = （2） （3） （4） (c) Determine the critical radius at the boundary between the static region and the moving region according to formula (5). R p ; （5） (d) Calculate the corrected rotational speed obtained from the fluid parameters according to formula (6) or (7). N mod ,in R p ≤ R o Formula (6) is used. R p > R o Formula (7) is used. （6） （7） (e) Apply the rotational speed described in step S4 of the 7 groups according to formula (8). N and the corrected rotational speed described in step (d) N mod Calculate the root mean square error (RMSE); RMSE= (8) (f) Changing the rheological parameters, yield stress Flow Index n and consistency coefficient K Repeat the above steps until the rheological parameter yield stress at which the minimum RMSE is obtained is obtained. Flow Index n and consistency coefficient K ; (g) Determine the initial values ​​using formula (9) μ value; (9) in n and K Using the value determined in step (f), The maximum shear rate; (h) Calculate the corrected speed using formula (10) or formula (11). ,in R p ≤ R o Formula (10) is used. R p > R o Formula (11) is used. （10） （11） (i) Calculate the rotational speed described in step S4 according to formula (12). N Calculated rotational speed Ω ; (12） (j) Rotational speed described in step (i) of group 7 Ω and the corrected rotational speed described in step (h) Calculate the root mean square error (RMSE); calculate the root mean square error (RMSE) according to formula (13); RMSE= (13) (k) Changing rheological parameters μ Repeat the above steps until the rheological parameters at which the minimum RMSE is obtained. μ ; (l) Obtain by step (f) for and using the results obtained in step (k) μ The shear work parameter SWI is calculated according to formula (14); + （14） In the formula: s , ρ and a These are three preset constants; s The shearing distance is selected based on the vibration amplitude of the vibrator; ρ The density of concrete; a The acceleration is the shear motion acceleration, selected based on the vibration acceleration amplitude.

2. The application of the shear work parameter (SWI) in concrete vibration testing, using the testing method described in claim 1 to calculate the SWI value, characterized in that: Includes the following steps: Establish SWI value and vibration time t Correspondence: t = k ·SWI + b (15) Early experiments were conducted with various concrete mixes to test the actual vibration time of the two mixes and to calculate the SWI value of the concrete mixes. Substitute multiple sets of data into formula (15) to calculate. k , b The value of SWI is used to determine the vibration time of the concrete to be tested.

3. A feedback control system for testing the rheological properties of concrete, characterized in that: The rheometer as described in claim 1 further includes a sensor module, a control host module, a feedback control module, and a vibration device. The sensors include a torque sensor and a speed sensor; the torque sensor and speed sensor are communicatively connected to the control host to measure the torque of the stirring blades during rotation in real time. T and rotational speed N The data is transmitted to the control host, which calculates the rheological parameter SWI according to steps (a) to (l) of the test method described in claim 1; the control host is communicatively connected to the feedback control module, which is electrically connected to the vibration equipment; the control host calculates the vibration time based on the rheological parameter SWI according to the steps of the application of the shear work parameter SWI in concrete vibration in the concrete rheological performance test method described in claim 2, and controls the vibration time of the vibration equipment through the feedback control module.

4. The concrete rheological property testing feedback control system according to claim 3, characterized in that: It also includes a remote control module. The control host and the remote control module are wirelessly connected. The remote control module remotely acquires rheological parameter data and vibration time data, and remotely controls the vibration time of the vibrating equipment through the remote control module.

5. A concrete rheological property testing feedback control system according to claim 3, characterized in that: The rheometer includes an outer cylinder, a support plate, and a bottom cover. The outer cylinder is a cylindrical structure extending vertically. The support plate is located at the top of the outer cylinder and is snapped onto the upper edge of the outer cylinder. The bottom cover is located at the bottom of the outer cylinder and is openable and closable. Multiple anti-slip strips are evenly distributed on the inner wall of the outer cylinder. A motor, a reducer, and a coupling are sequentially arranged above the support plate from top to bottom and are connected in sequence. A stirring blade is installed inside the outer cylinder, with the shaft of the stirring blade coaxial with the outer cylinder. The stirring blade has a cross-shaped cross section and is detachably connected to the coupling. A hopper communicating with the interior of the outer cylinder is located at the upper edge of the outer cylinder.

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