Rapid quantitative evaluation method and testing device for simulating flowing property of hydraulic concrete at actual mold entering moment

Abstract

The invention relates to a rapid quantitative evaluation method and a testing device for simulating the flowing property of hydraulic concrete at the actual mold entering moment. The method comprises the following steps: (1) debugging the testing device for the flowing property of the hydraulic concrete; (2) carrying out a test and measuring the weight of the concrete charging basket at each stage in the test; and (3) calculating a quantitative evaluation index of the flowing property of the hydraulic concrete based on the weight of the concrete charging basket at each stage measured in the step (2). The testing device comprises a concrete stock bin, fresh concrete to be tested, a stock bin baffle, a laser induction timer, a fixed hinge support, a high-strength bolt, a supporting platform, a concrete charging basket, a weighing machine, a reinforcing steel bar and a vibrating rod. The flowing property of the hydraulic concrete at the actual mold entering moment is truly and accurately evaluated, and the defects that in a traditional method, testing of the flowing property of the hydraulic concrete at the actual mold entering moment is not carried out, and quantitative evaluation indexes of the flowing property are lacked are overcome.

Description

Technical Field

[0001] The invention relates to the field of testing and evaluating the fluidity of hydraulic concrete, and in particular to a rapid quantitative evaluation method and a testing device for simulating the fluidity of hydraulic concrete at the actual moment of entering a mold. Background Art

[0002] In the structural construction of water transport projects, in order to ensure the uniformity and density of the concrete structure, the newly mixed hydraulic concrete must have good flow properties. Newly mixed hydraulic concrete with poor flow properties will become sticky or clump or bleed, which seriously affects the uniformity and density of the concrete structure during the pouring process and after hardening.

[0003] Therefore, in order to ensure the construction quality of water transport projects and improve the flowability and uniformity of concrete at the construction site, it is necessary to conduct a true and accurate quantitative evaluation of the flowability of freshly mixed hydraulic concrete at the time of actual pouring into the mold. At present, the test method for the flowability of concrete at the construction site is usually based on the slump method, which measures the expansion and slump of freshly mixed concrete, and then combines the empirical method to comprehensively evaluate the state of the concrete flowability. The slump test method is suitable for ordinary concrete with a crushed stone gradation of less than 40cm, but for freshly mixed hydraulic concrete with a crushed stone gradation of more than 40cm, it is necessary to screen out crushed stones larger than 40cm before using the slump method, which increases the workload of testing the flowability. Moreover, this test method is only tested at the mixing and unmixing stage in the laboratory, and does not test and evaluate the flowability of hydraulic concrete at the actual time of pouring and vibrating through the steel mesh into the mold.

[0004] The traditional test and evaluation method of concrete flow properties can roughly evaluate the flow properties of hydraulic concrete, but the test workload is large, the evaluation parameters are rough and inaccurate, and it can only analyze the flow properties of hydraulic concrete in the mixing and unmixing stage and after screening out gravel larger than 40cm, and it cannot quickly complete the test and quantitatively evaluate. This results in the flow properties of freshly mixed hydraulic concrete from transportation to vibration and pouring not being monitored and fed back in time, and thus the flow properties of freshly mixed hydraulic concrete cannot be accurately controlled according to the flow state of the freshly mixed hydraulic concrete at the actual time of entering the mold. Summary of the invention

[0005] In order to truly and accurately quantitatively evaluate the flowability of hydraulic concrete at the construction site and solve the limitations of the flowability test of hydraulic concrete, the present invention provides a rapid quantitative evaluation method and testing device for simulating the flowability of hydraulic concrete at the actual time of mold entry, which can facilitate on-site construction personnel to test and evaluate the flowability of fully graded hydraulic concrete after vibrating and pouring. By measuring the weight of fresh concrete discharged within 7 seconds, the flowability evaluation index of fresh hydraulic concrete is calculated, and the flowability of hydraulic concrete at the construction site is accurately evaluated.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: a rapid quantitative evaluation method for simulating the flow performance of hydraulic concrete at the actual time of entering the mold, comprising the following steps:

[0007] (1) Debug the test device for the flow properties of hydraulic concrete: Use a level to find a horizontal test surface, place the concrete test device on the horizontal surface, turn on the electronic scale and set it to zero, weigh the concrete bucket to observe the weighing accuracy of the weighing machine, and after confirming that it meets the weighing requirements, fix the concrete silo on the support platform and close the silo baffle;

[0008] (2) Record the weight of the concrete bucket at each stage of the flow performance test: Place the concrete bucket on a weighing machine and set it to zero and peel off the tar. Pour the prepared fresh concrete to be tested into the concrete bucket and mix it evenly. The weighing scale is W1. Connect the upper end of the concrete silo with high-strength bolts to adjust the test angle, and close the concrete silo baffle. Then gradually pour the fresh concrete to be tested in the concrete bucket into the concrete silo evenly within 1 minute, and use a vibrating rod to pass through the steel bars to vibrate the hydraulic concrete. After the pouring and vibration are completed, use a scraper to scrape off the excess concrete on the surface of the silo and vibrate it fully. Collect the scraped concrete and pour it back into the concrete bucket. The weighing scale is W2. After scraping the concrete on the top surface of the concrete silo and letting it stand for 3 seconds, open the lower baffle of the concrete silo. Start timing when the fresh concrete to be tested leaks out. When the time reaches 7 seconds, immediately close the lower baffle of the concrete silo to prevent the concrete from continuing to fall. Record the displayed value of the weighing machine at this time, W3;

[0009] (3) Based on the weight of each concrete mixture measured in step (2), a quantitative evaluation index of the flowability of hydraulic concrete is calculated: the weight values ​​of the concrete buckets at each stage obtained in each test experiment are combined to calculate the quantitative evaluation index of the flowability of hydraulic concrete under the test angle;

[0010] The specific calculation formula for calculating the quantitative evaluation index of the flow performance of hydraulic concrete is:

[0011]

[0012] Wherein, W1 is the weight of the fresh concrete to be tested; W2 is the weight of the concrete in the concrete bucket after the concrete silo is filled and leveled; W3 is the weight of the concrete in the bucket 7 seconds after the concrete silo is unloaded; η is the evaluation index of the flowability of hydraulic concrete under the test angle, and the value range of η is 0<η<1, where the larger the η value, the better the flowability of the concrete.

[0013] The device suitable for the rapid quantitative evaluation method of the flow performance of the simulated hydraulic concrete at the actual time of entering the mold comprises a concrete silo, fresh concrete to be tested, a silo baffle, a laser induction timer, a fixed hinge support, a high-strength bolt, a support platform, a concrete bucket, a weighing machine, steel bars and a vibrating rod, wherein the support platform is placed on a horizontal ground, the upper end of the concrete silo is connected to the support platform through a high-strength bolt, the lower end of the concrete silo is connected to the support platform through a fixed hinge support, the steel bars are evenly welded to the inner wall of the concrete silo, the vibrating rod is inserted from the upper port of the concrete silo into the fresh concrete to be tested, the silo baffle and the laser induction timer are both connected to the lower end of the concrete silo, the laser beam port of the laser induction timer is aligned with the discharge port at the lower end of the concrete silo, the weighing machine is placed on the bottom layer of the support platform, and the concrete bucket is placed on the weighing machine and is located below the discharge port at the lower end of the concrete silo. After the test starts, the fresh concrete to be tested slides into the concrete bucket, and the weighing machine can display its weight change in real time.

[0014] The concrete silo is an open-type chamber with a capacity of 80L and an internal space size of 400mm×400mm×500mm.

[0015] The support platform includes five platforms, the first platform is the base of the support platform, the free end of the second platform is installed with a fixed hinge support, and the lower end of the concrete silo is connected to the fixed hinge support; the free ends and fixed ends of the remaining three platforms are installed with high-strength bolt holes. When the test angle is lowered, the high-angle support platform is disassembled by removing the bolt holes at the fixed end to avoid affecting the experiment. The high-strength bolts are connected to the upper end of the concrete silo 1 through the high-strength bolt holes at the free end, and the angles between the concrete silo and the horizontal direction can be adjusted to 30°, 45°, and 60° respectively.

[0016] The laser induction timer is fixed at the lower discharge port of the concrete silo, and the accuracy of the laser induction timer is ±0.1s.

[0017] The weighing range of the weighing machine is 0-100kg, and the accuracy is ±0.5g.

[0018] The concrete bucket is located at the discharge port direction of the lower end of the concrete silo, the distance between the open mouth of the concrete bucket and the discharge port of the concrete silo is 100-150mm, the capacity of the concrete bucket is 80L, and the internal space size is 400×400×500mm.

[0019] Each layer of steel bars is evenly welded to the inner wall of the concrete silo in a cross shape, the uppermost layer of steel bars is 150 mm away from the concrete silo port, the spacing between each layer of steel bars is 200 mm, and the steel bar grid size is 200 mm.

[0020] The vibrating rod is inserted into the interior of the freshly mixed concrete to be tested from the upper port of the concrete silo, and gradually moves upwards as the concrete is poured.

[0021] The outstanding advantages of the present invention are:

[0022] 1. This method can test and quantitatively evaluate the flow properties of fully graded hydraulic concrete after vibrating and pouring. It is simple and fast, and overcomes the defects of inaccurate testing of concrete flow properties after screening out high-grade crushed stone and increased testing workload in traditional evaluation methods.

[0023] 2. By calculating the evaluation index of hydraulic concrete flowability, the flowability of freshly mixed hydraulic concrete from transportation to vibration and pouring can be monitored and fed back in time, which has important engineering application value for quantitative evaluation of the flowability of hydraulic concrete at the construction site. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the initial state of the test experiment of the fluidity performance of hydraulic concrete in Example 1.

[0025] Figure 2 This is a schematic diagram of the end state of the test experiment of the fluidity performance of hydraulic concrete in Example 1.

[0026] Figure 3 This is a schematic diagram of the test and evaluation results of the fluidity performance of hydraulic concrete in Example 1.

[0027] Marked in the figure are: concrete silo 1, fresh concrete to be tested 2, silo baffle 3, laser sensor timer 4, fixed hinge support 5, high-strength bolt 6, support platform 7, concrete bucket 8, weighing machine 9, steel bar 10, vibrating rod 11. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] Example 1

[0030] This embodiment is an example of a rapid quantitative evaluation method for the flow properties of simulated hydraulic concrete at the actual time of mold entry according to the present invention, comprising the following steps:

[0031] (1) Debug the test device for the flow properties of hydraulic concrete: Use a level to find a horizontal test surface, place the concrete test device on the horizontal surface, turn on the electronic scale and set it to zero, weigh the concrete bucket to observe the weighing accuracy of the weighing machine, and after confirming that it meets the weighing requirements, fix the concrete silo on the support platform and close the silo baffle;

[0032] (2) Record the weight of the concrete bucket at each stage of the flow performance test: Place the concrete bucket on a weighing machine and set it to zero and peel off the tar. Pour the prepared fresh concrete to be tested into the concrete bucket and mix it evenly. The weighing machine is W1. Connect the upper end of the concrete silo with high-strength bolts so that the test angle is 60°, and close the concrete silo baffle. Then gradually pour the fresh concrete to be tested in the concrete bucket into the concrete silo evenly within 1 minute. At the same time, use a vibrating rod to vibrate the hydraulic concrete through the steel bars. After the pouring and vibration are completed, use a scraper to scrape off the excess concrete on the surface of the silo and vibrate it fully. Collect the scraped concrete and pour it back into the concrete bucket. The weighing machine is W2. After scraping the concrete on the top surface of the concrete silo and letting it stand for 3 seconds, open the lower baffle of the concrete silo. When the fresh concrete to be tested leaks out, start timing. When the time reaches 7 seconds, immediately close the lower baffle of the concrete silo to prevent the concrete from continuing to fall. Record the displayed value of the weighing machine at this time, W3;

[0033] (3) Based on the weight of each concrete mixture measured in step (2), the quantitative evaluation index of the flowability of the hydraulic concrete is calculated: the weight values ​​of the concrete buckets at each stage obtained in each test experiment are combined to calculate the quantitative evaluation index of the flowability of the hydraulic concrete at a test angle of 60°;

[0034] The specific calculation formula for calculating the quantitative evaluation index of the flow performance of hydraulic concrete is:

[0035]

[0036] Wherein, W1 is the weight of the fresh concrete to be tested; W2 is the weight of the concrete in the concrete bucket after the concrete silo is filled and leveled; W3 is the weight of the concrete in the bucket 7 seconds after the concrete silo is unloaded; η is the evaluation index of the flowability of hydraulic concrete at a test angle of 60°, and the value range of η is 0<η<1, where the larger the η value, the better the flowability of the concrete.

[0037] The above experimental steps were carried out in three groups of parallel experiments, and the results of each experiment are shown in the following table.

[0038] Table 1 Test weight of fresh concrete at each test angle (kg)

[0039]

[0040]

[0041] Note: Due to the loss of hydraulic concrete mixture during the vibration test, W3≠W1.

[0042] Table 2 Quantitative evaluation indexes of flow properties of hydraulic concrete

[0043] test Evaluation index η <![CDATA[η1]]> 0.976795 <![CDATA[η2]]> 0.980547 <![CDATA[η3]]> 0.971189

[0044] The experimental results show that, according to the flow performance test method, only the flow performance evaluation test of hydraulic concrete was carried out at a test angle of 60°. The evaluation indicators of the flow performance of hydraulic concrete at this test angle were 0.976795, 0.980547 and 0.971189, respectively. The evaluation results of the three tests were basically consistent, which also shows that this method can accurately and quickly quantitatively evaluate the flow performance of hydraulic concrete at the actual moment of entering the mold after vibration and mixing.

[0045] Example 2

[0046] Comparison Figure 1 and Figure 2 This embodiment is a test device used in the method for rapid quantitative evaluation of flow performance of simulated hydraulic concrete at the actual time of mold entry according to the present invention. The specific components include a concrete silo 1, a silo baffle 3, a laser sensor timer 4, a fixed hinge support 5, a high-strength bolt 6, a support platform 7, a concrete bucket 8, a weighing machine 9, a steel bar 10 and a vibrating rod 11. The structure and connection method of the specific components are as follows:

[0047] The support platform 7 is placed on a horizontal ground, the upper end of the concrete silo 1 is connected to the support platform 7 by a high-strength bolt 9, the lower end of the concrete silo 1 is connected to the support platform 7 by a fixed hinge support 5, the steel bars 10 are evenly welded to the inner wall of the concrete silo 1, the vibrating rod 11 is inserted from the upper port of the concrete silo 1 into the interior of the freshly mixed concrete 2 to be tested, the silo baffle 3 and the laser sensing timer 4 are both connected to the lower end of the concrete silo 1, the laser beam port of the laser sensing timer 4 is aligned with the discharge port at the lower end of the concrete silo 1, the weighing machine 9 is placed on the bottom layer of the support platform, the concrete bucket 8 is placed on the weighing machine 9, and is located below the discharge port at the lower end of the concrete silo 1.

[0048] The concrete silo 1 is an open-type chamber with a capacity of 80L and an internal space size of 400mm×400mm×500mm.

[0049] The support platform 7 includes five platforms, the first platform is the base of the support platform 7, the free end of the second platform is installed with a fixed hinge support 5, and the lower end of the concrete silo 1 is connected to the fixed hinge support 5; the free ends and fixed ends of the remaining three platforms are installed with high-strength bolt holes. When the test angle is lowered, the high-angle support platform is disassembled by removing the bolt holes at the fixed end to avoid affecting the experiment. The high-strength bolts 6 are connected to the upper end of the concrete silo 1 through the high-strength bolt holes at the free end, and the angles between the concrete silo and the horizontal direction can be adjusted to 30°, 45°, and 60° respectively.

[0050] The laser induction timer 4 is fixed to the lower discharge port of the concrete silo 1, and the accuracy of the laser induction timer 4 is ±0.1s.

[0051] The weighing range of the weighing machine 9 is 0-100kg, and the accuracy is ±0.5g.

[0052] The concrete bucket 8 is located at the discharge port direction of the lower end of the concrete silo 1, and the distance between the opening of the concrete bucket 8 and the discharge port of the concrete silo 1 is 100-150mm. The capacity of the concrete bucket 8 is 80L, and the internal space size is 400×400×500mm.

[0053] Each layer of the steel bars 10 is in a cross shape and is evenly welded to the inner wall of the concrete silo 1. The top layer of steel bars is 150 mm away from the concrete silo port. The spacing between each layer of steel bars is 200 mm, and the steel bar grid size is 200 mm.

[0054] The vibrating rod 11 is inserted into the interior of the fresh concrete 2 to be tested from the upper port of the concrete silo 1, and gradually moves upwards as the concrete is poured.

[0055] Working principle and process:

[0056] The working principle of the present invention is to quickly and quantitatively evaluate the flowability of hydraulic concrete by simulating the state of hydraulic concrete when it is put into the mold during actual construction. Specifically, the hydraulic concrete to be tested is placed in a test device at different inclination angles (30°, 45°, 60°), its fluidity is observed under the action of vibration, and the evaluation index is calculated based on the weight difference of the concrete flowing out of the silo within a specific time. This method can simply and quickly evaluate the flowability of hydraulic concrete, so as to regulate and ensure that the hydraulic concrete has good uniformity and density during construction, thereby improving the quality of construction projects.

[0057] The working process is:

[0058] (1) Debugging the flow performance test device

[0059] Place the hydraulic concrete flow performance test device on the horizontal surface, adjust the test angle of the hydraulic concrete flow performance after laying, then connect the upper end of the concrete silo to the support platform through high-strength bolts, connect the lower end of the concrete silo to the support platform through fixed hinge supports, and connect the lower end of the concrete silo to the silo baffle and laser sensor timer. Turn on the weighing machine and calibrate it to zero, weigh the empty concrete barrel, and after ensuring that the weighing meets the requirements, turn the silo baffle to close the lower port of the concrete silo and prepare for the test.

[0060] (2) Record the weight of the concrete bucket at each stage of the test

[0061] Pour the fresh concrete to be tested into the material bucket and weigh the concrete sample weight W1. Pour the concrete into the silo evenly within 1 minute, and use a vibrating rod to pass through the steel bars to vibrate the concrete in the silo until the fresh concrete to be tested reaches a uniform state. After the pouring is completed, use a scraper to scrape the concrete on the top of the silo, pour the scraped concrete back into the bucket, and weigh the concrete weight W2. After standing for 3 seconds, turn on the laser induction timer at the lower end of the concrete silo, and then turn the silo baffle to let the fresh concrete to be tested flow out. At this time, the laser induction timer senses the fresh concrete to be tested and starts timing for 7s. Immediately close the baffle after 7s, and record the concrete weight W3 displayed on the weighing machine at this time.

[0062] (3) Calculate quantitative evaluation indicators of flow performance

[0063] Based on the weights W1, W2 and W3 obtained in step (2), the flow performance evaluation index of the hydraulic concrete at the selected test angle is calculated.

[0064] The flow performance index of hydraulic concrete is calculated using the following formula:

[0065]

[0066] Wherein, W1 is the weight of the fresh concrete to be tested; W2 is the weight of the concrete in the concrete bucket after the concrete silo is filled and leveled; W3 is the weight of the concrete in the bucket 7 seconds after the concrete silo is unloaded; η is the evaluation index of the flowability of hydraulic concrete at the selected test angle, and the value range of η is 0<η<1, where the larger the η value, the better the flowability of the concrete.

Claims

1. A rapid quantitative evaluation method for simulating the flow properties of hydraulic concrete at the actual time of mold entry, characterized in that: The following steps are involved: (1) Debug the test device for the flow properties of hydraulic concrete: Use a level to find a horizontal test surface, place the concrete test device on the horizontal surface, turn on the electronic scale and set it to zero, weigh the concrete bucket to observe the weighing accuracy of the weighing machine, and after confirming that it meets the weighing requirements, fix the concrete silo on the support platform and close the silo baffle; (2) Record the weight of the concrete bucket at each stage of the flow performance test: Place the concrete bucket on a weighing machine and set it to zero and peel off the tar. Pour the prepared fresh concrete to be tested into the concrete bucket and mix it evenly. The weighing scale is W1. Connect the upper end of the concrete silo with high-strength bolts to adjust the test angle, and close the concrete silo baffle. Then gradually pour the fresh concrete to be tested in the concrete bucket into the concrete silo evenly within 1 minute, and use a vibrating rod to pass through the steel bars to vibrate the hydraulic concrete. After the pouring and vibration are completed, use a scraper to scrape off the excess concrete on the surface of the silo and vibrate it fully. Collect the scraped concrete and pour it back into the concrete bucket. The weighing scale is W2. After scraping the concrete on the top surface of the concrete silo and letting it stand for 3 seconds, open the lower baffle of the concrete silo. Start timing when the fresh concrete to be tested leaks out. When the time reaches 7 seconds, immediately close the lower baffle of the concrete silo to prevent the concrete from continuing to fall. Record the displayed value of the weighing machine at this time, W3; (3) Based on the weight of each concrete mixture measured in step (2), a quantitative evaluation index of the flowability of hydraulic concrete is calculated: the weight values ​​of the concrete buckets at each stage obtained in each test experiment are combined to calculate the quantitative evaluation index of the flowability of hydraulic concrete under the test angle; The specific calculation formula for calculating the quantitative evaluation index of the flow performance of hydraulic concrete is: Wherein, W1: is the weight of the fresh concrete to be tested; W2: is the weight of the concrete in the concrete bucket after the concrete silo is filled and leveled; W3: The weight of concrete in the bucket 7s after the concrete silo is unloaded; η: It is an evaluation index of the flow performance of hydraulic concrete under the test angle, and the value range of η is 0<η<1, where the larger the η value, the better the concrete flow performance.

2. A testing device applicable to the rapid quantitative evaluation method of the flow performance of simulated hydraulic concrete at the actual time of entering the mold as claimed in claim 1, characterized in that: It includes a concrete silo, fresh concrete to be tested, a silo baffle, a laser induction timer, a fixed hinge support, high-strength bolts, a support platform, a concrete bucket, a weighing machine, steel bars and a vibrating rod. The support platform is placed on a horizontal ground. The upper end of the concrete silo is connected to the support platform through high-strength bolts, and the lower end of the concrete silo is connected to the support platform through a fixed hinge support. The steel bars are evenly welded to the inner wall of the concrete silo. The vibrating rod is inserted into the fresh concrete to be tested from the upper port of the concrete silo. The silo baffle and the laser induction timer are both connected to the lower end of the concrete silo. The laser beam port of the laser induction timer is aligned with the discharge port at the lower end of the concrete silo. The weighing machine is placed on the bottom layer of the support platform. The concrete bucket is placed on the weighing machine and is located below the discharge port at the lower end of the concrete silo.

3. The testing device for the rapid quantitative evaluation method of the flow performance of the simulated hydraulic concrete at the actual time of entering the mold according to claim 2 is characterized in that: The concrete silo is an open-type chamber with a capacity of 80L and an internal space size of 400mm×400mm×500mm.

4. The testing device for the rapid quantitative evaluation method of the flow performance of simulated hydraulic concrete at the actual time of entering the mold according to claim 2 is characterized in that: The support platform includes five platforms, the first platform is the base of the support platform, the free end of the second platform is installed with a fixed hinge support, and the lower end of the concrete silo is connected to the fixed hinge support; the free ends and fixed ends of the remaining three platforms are installed with high-strength bolt holes. When the test angle is lowered, the high-angle support platform is disassembled by removing the bolt holes at the fixed end to avoid affecting the experiment. The high-strength bolts 6 are connected to the upper end of the concrete silo 1 through the high-strength bolt holes at the free end, and the angles between the concrete silo and the horizontal direction can be adjusted to 30°, 45°, and 60° respectively.

5. The device for rapid quantitative evaluation of flow properties of simulated hydraulic concrete at the time of actual mold entry according to claim 2, characterized in that: The laser induction timer is fixed at the lower discharge port of the concrete silo, and the accuracy of the laser induction timer is ±0.1s.

6. The testing device for the rapid quantitative evaluation method of the flow performance of simulated hydraulic concrete at the actual time of entering the mold according to claim 2, characterized in that: The weighing range of the weighing machine is 0-100kg, and the accuracy is ±0.5g.

7. The testing device for the rapid quantitative evaluation method of the flow performance of simulated hydraulic concrete at the actual time of entering the mold according to claim 2, characterized in that: The concrete bucket is located at the discharge port direction of the lower end of the concrete silo, the distance between the open mouth of the concrete bucket and the discharge port of the concrete silo is 100-150mm, the capacity of the concrete bucket is 80L, and the internal space size is 400×400×500mm.

8. The testing device for the rapid quantitative evaluation method of the flow performance of simulated hydraulic concrete at the actual time of entering the mold according to claim 2, characterized in that: Each layer of steel bars is in a cross shape and is evenly welded to the inner wall of the concrete silo. The top layer of steel bars is 150 mm away from the concrete silo port. The spacing between each layer of steel bars is 200 mm, and the steel bar grid size is 200 mm.

9. The testing device for the rapid quantitative evaluation method of the flow performance of simulated hydraulic concrete at the actual time of entering the mold according to claim 2, characterized in that: The vibrating rod is inserted into the interior of the freshly mixed concrete to be tested from the upper port of the concrete silo, and gradually moves upwards as the concrete is poured.

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