Self-compacting concrete working performance detection device and detection method

Abstract

The invention discloses a self-compacting concrete working performance detection device, comprising a square base plate, a plurality of weighing sensors are arranged at the bottom of the base plate, a controller is arranged on the surface close to one end of the base plate, a chip is arranged in the controller, a display screen is arranged on the surface of the controller, and the chip is electrically connected to the display screen and the weighing sensor respectively; a slump cone is attached to the center of the base plate surface; a circle of infrared sensors with a radius of 250mm and the center of the base plate as the center is arranged at the bottom of the base plate, and the infrared sensors are arranged at equal intervals; a level is installed at the bottom of the base plate; the invention also discloses a self-compacting concrete working performance detection method, the weighing sensor transmits gravity information to the chip, and the infrared sensor transmits self-compacting concrete information position information to the chip; the self-compacting concrete performance information is calculated and transmitted to the display screen for display; the problem that the uneven base plate and the subjectivity of manual readings in the prior art lead to large errors in the detection results is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete detection devices, and in particular relates to a self-compacting concrete working performance detection device, and also relates to a self-compacting concrete working performance detection method. Background Art

[0002] The expansion is an indicator of the fluidity of concrete. Whether in the laboratory or on the construction site, the expansion test must be carried out on the concrete to evaluate the working performance of self-compacting concrete. The existing detection method is to lift the slump cone filled with concrete vertically from the bottom plate at a uniform speed, and let the concrete mixture spread on the bottom non-plate. When the mixture no longer spreads or the diffusion time reaches 60s, use a steel ruler to measure the diameter of the mixture after diffusion at the maximum diameter and in the vertical direction. The average of the two diameter measurements after diffusion is taken as the expansion.

[0003] The existing detection method adopts manual measurement and manual reading. The measurement results are inaccurate, the readings are prone to errors, and the measurement data results are relatively simple, which cannot accurately evaluate the other working properties of concrete. In actual detection, there are cases where the bottom plate is uneven and the expansion is irregular. In addition, when measuring the expansion, it is generally required to keep photos for future inspection, but due to the problem of shooting angle, some visual errors are also prone to occur. Summary of the invention

[0004] The purpose of the present invention is to provide a self-compacting concrete working performance detection device, which solves the problems in the prior art of uneven bottom plate and subjectivity of manual readings leading to large errors in detection results.

[0005] Another object of the present invention is to provide a method for detecting the working performance of self-compacting concrete, which solves the problem in the prior art that the unevenness of the bottom plate is ignored, resulting in large errors in the detection results.

[0006] The technical solution adopted by the present invention is a self-compacting concrete working performance detection device, which includes a square base plate, a plurality of weighing sensors are arranged at the bottom of the base plate, a controller is arranged on the surface close to one end of the base plate, a chip is arranged in the controller, a display screen is arranged on the surface of the controller, and the chip is electrically connected to the display screen and the weighing sensor respectively; a slump cone is attached to the center of the base plate surface; a circle of infrared sensors with a radius of 250 mm and the center of the base plate as the center is arranged at the bottom of the base plate, and there are no less than two infrared sensors, and the infrared sensors are arranged at equal intervals; a level is installed at the bottom of the base plate, and the level is electrically connected to the chip.

[0007] The present invention is also characterized in that:

[0008] A plurality of weighing sensors are arranged at the bottom of the base plate to form a square, and the plurality of weighing sensors are arranged at equal intervals.

[0009] Another technical solution adopted by the present invention is a method for detecting the working performance of self-compacting concrete, using a self-compacting concrete working performance detection device, and the specific steps are as follows:

[0010] Step 1: Establish a rectangular coordinate system with the center of the base plate as the origin in the chip, obtain the angle between the base plate and the horizontal ground through a level meter, and set the timing logic in the chip;

[0011] Step 2: Place the slump cone filled with self-compacting concrete at the center of the bottom plate, lift the slump cone to 290mm-310mm, and let the self-compacting concrete fall naturally under the action of gravity. The weighing sensor transmits the gravity information to the chip, and the infrared sensor transmits the position information of the self-compacting concrete to the chip;

[0012] Step 3: Calculate according to the gravity information and the angle to obtain the expansion, bulk density, expansion area and equivalent expansion of the self-compacting concrete;

[0013] Step 4: Transmit the expansion degree, bulk density, expansion area and equivalent expansion degree to the display screen for display.

[0014] Another technical solution of the present invention is also characterized in that:

[0015] The timing logic is as follows: when the gravity on the bottom plate changes, the timing starts; when the infrared sensor senses the position information, the timing stops, and the timing time is obtained; and the timing time is displayed on the display screen.

[0016] The calculation method of the extension degree is as follows: according to the gravity information obtained by the weighing sensor, a gravity distribution map is drawn in the rectangular coordinate system, the two farthest gravity points in the gravity distribution map are found, and the coordinate difference of the two farthest gravity points is calculated to obtain the farthest distance; the line between the two farthest gravity points is taken as the base line, and the line segment perpendicular to the center of the base line is found as the calibration line, and the two farthest gravity points on the calibration line are subtracted to obtain the corrected distance, and the farthest distance and the corrected distance are averaged to obtain the extension degree.

[0017] The specific calculation of bulk density is as follows: the initial weight before timing and the final weight after expansion measurement are obtained through a weighing sensor, the final weight is subtracted from the initial weight to obtain the weight of the self-compacting concrete; the mass of the self-compacting concrete is compared with the volume of the slump cone to obtain the actual bulk density.

[0018] The calculation of the expansion area is as follows:

[0019] (1)

[0020] In formula (1), A represents the expansion area; x represents the abscissa of the rectangular coordinate system, and y represents the ordinate of the rectangular coordinate system; represents the i-th point on the horizontal axis in the rectangular coordinate system, Indicates the first point on the horizontal axis in the rectangular coordinate system. represents the i+1th point on the vertical axis in the rectangular coordinate system, Indicates the first point on the vertical axis in the rectangular coordinate system.

[0021] The calculation process of equivalent expansion is as follows:

[0022] ; (2)

[0023] In formula (2), represents the correction parameter;

[0024] When the angle is not greater than 5°, is 0.987-0.989; when the angle is greater than 5° and not greater than 10°, It is 0.919-0.921.

[0025] The beneficial effects of the present invention are as follows: a chip is provided in the detection device for processing the acquired data, a weighing sensor is used to acquire the physical importance of the base plate and the position sensing of the self-compacting concrete on the floor, a timing logic is provided in the chip, and the time required for T500 detection can be measured; a level is also provided, which can realize the measurement of the base plate angle and facilitate the correction of data; by calculating the position and area size of the concrete on the base plate, a more accurate expansion degree of the self-compacting concrete can be calculated. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a self-compacting concrete working performance detection device of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the bottom plate in the self-compacting concrete working performance detection device of the present invention.

[0028] In the figure, 1. base plate, 2. weighing sensor, 3. controller, 4. chip, 5. display screen, 6. slump cone, 7. infrared sensor, 8. level. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] The self-compacting concrete working performance detection device of the present invention is as follows: Figure 1 and Figure 2As shown, the self-compacting concrete working performance detection device includes a square base plate 1, a plurality of weighing sensors 2 are arranged at the bottom of the base plate 1, a controller 3 is arranged on the surface close to one end of the base plate 1, a chip 4 is arranged in the controller 3, a display screen 5 is arranged on the surface of the controller 3, and the chip 4 is electrically connected to the display screen 5 and the weighing sensor 2 respectively; a slump cone 6 is attached to the center of the surface of the base plate 1; a circle of infrared sensors 7 with a radius of 250 mm and a center of the base plate 1 as the center is arranged at the bottom of the base plate 1, and there are no less than two infrared sensors 7, and the infrared sensors 7 are arranged at equal intervals; a level 8 is installed at the bottom of the base plate 1, and the level 8 is electrically connected to the chip 4.

[0031] A plurality of weighing sensors 2 are arranged in a square shape at the bottom of the base plate 1 , and the plurality of weighing sensors 2 are arranged at equal intervals.

[0032] The method for detecting the working performance of self-compacting concrete of the present invention uses a self-compacting concrete working performance detection device, and the specific steps are as follows:

[0033] Step 1: Establish a rectangular coordinate system with the center of the base plate 1 as the origin in the chip 4, obtain the angle between the base plate 1 and the horizontal ground through the level 8, and set the timing logic in the chip 4;

[0034] Step 2: Place the slump cone 6 filled with self-compacting concrete at the center of the bottom plate 1, lift the slump cone 6 to 290mm-310mm, and let the self-compacting concrete fall naturally under the action of gravity. The weighing sensor 2 transmits the gravity information to the chip 4, and the infrared sensor 7 transmits the position information of the self-compacting concrete to the chip 4;

[0035] Step 3: Calculate according to the gravity information and the angle to obtain the expansion, bulk density, expansion area and equivalent expansion of the self-compacting concrete;

[0036] Step 4: Transmit the expansion degree, bulk density, expansion area and equivalent expansion degree to the display screen 5 for display.

[0037] The timing logic is as follows: when the gravity on the bottom plate changes, the timing starts; when the infrared sensor senses the position information, the timing stops, and the timing time is obtained; and the timing time is displayed on the display screen.

[0038] The calculation method of the extension degree is as follows: according to the gravity information obtained by the weighing sensor, a gravity distribution map is drawn in the rectangular coordinate system, the two farthest gravity points in the gravity distribution map are found, and the coordinate difference of the two farthest gravity points is calculated to obtain the farthest distance; the line between the two farthest gravity points is taken as the base line, and the line segment perpendicular to the center of the base line is found as the calibration line, and the two farthest gravity points on the calibration line are subtracted to obtain the corrected distance, and the farthest distance and the corrected distance are averaged to obtain the extension degree.

[0039] The specific calculation of bulk density is as follows: the initial weight before timing and the final weight after expansion measurement are obtained through a weighing sensor, the final weight is subtracted from the initial weight to obtain the weight of the self-compacting concrete; the mass of the self-compacting concrete is compared with the volume of the slump cone to obtain the actual bulk density.

[0040] The calculation of the expansion area is as follows:

[0041] (1)

[0042] In formula (1), A represents the expansion area; x represents the abscissa of the rectangular coordinate system, and y represents the ordinate of the rectangular coordinate system; represents the i-th point on the horizontal axis in the rectangular coordinate system, Indicates the first point on the horizontal axis in the rectangular coordinate system. represents the i+1th point on the vertical axis in the rectangular coordinate system, Indicates the first point on the vertical axis in the rectangular coordinate system.

[0043] The calculation process of equivalent expansion is as follows:

[0044] ; (2)

[0045] In formula (2), represents the correction parameter;

[0046] When the angle is not greater than 5°, is 0.987-0.989; when the angle is greater than 5° and not greater than 10°, It is 0.919-0.921.

[0047] Among them, the detection of actual bulk density is conducive to the judgment of the water content in the self-compacting concrete, and is more conducive to the preparation of self-compacting concrete with better expansion. The specific judgment method is: compare the actual bulk density with the theoretical bulk density, and the deviation value is calculated as:

[0048] (3)

[0049] In formula (3), Indicates the deviation value, represents the theoretical bulk density, Indicates actual bulk density;

[0050] like When the content is not less than 3%, the self-compacting concrete will be viscous or segregated, and water should be added in a gradient of 8-10kg. , the self-compacting concrete is slightly viscous or slightly segregated, and water needs to be added in a gradient of 5-8kg; if , the self-compacting concrete is in normal state; if , the self-compacting concrete has a slight oozing, and the water consumption needs to be reduced by 5-8kg; if Not more than -3%, the self-compacting concrete shows coarse aggregate sinking, and the water consumption needs to be reduced in a gradient of 8-10kg.

[0051] The angle between the base plate 1 and the ground measured by the level 8, if the angle is between 0-10°, data correction can be performed through calculation to reduce the error; if the angle is not less than 10°, the angle between the base plate 1 and the ground needs to be manually adjusted.

[0052] The setting of the infrared sensor 7 with a radius of 250mm is set according to the T500 test content of concrete. The infrared sensor 7 stops timing after receiving the position information of the self-compacting concrete; the infrared sensor is arranged to mainly measure the expansion time T500, which is an important indicator for measuring the filling property of the concrete mixture; the filling property test of concrete is carried out according to the following steps:

[0053] Step 1: The base plate and slump cone should be wetted first. There should be no visible water on the inner wall of the slump cone and the base plate. The base plate should be placed on a solid horizontal surface, and the cone should be placed in the center of the base plate. Then step on the pedals on both sides. The slump cone should be kept in a fixed position when loading.

[0054] Step 2: When the concrete mixture does not segregate, use the container to evenly fill the slump cone with the concrete mixture at one time, and do not tamp or vibrate it;

[0055] Step 3: Use a scraper to scrape off the top and surrounding concrete residue of the slump cone, so that the concrete is flush with the upper edge of the slump cone, and then quickly lift the slump cone vertically to a height of about 300mm at a uniform speed;

[0056] Step 4: When measuring the time (T) for the expansion to reach 500mm, it should start from the moment the slump cone is lifted off the ground, and end when the outer edge of the expanded concrete first touches the circle with a diameter of 500mm drawn on the flat plate. A stopwatch should be used to measure the time with an accuracy of 0.1s.

[0057] The correction factor is the ratio of the expansion when the bottom plate 1 is flat to the expansion when the bottom plate has an inclination. When conducting the expansion experiment, the expansion of the same batch of concrete is 680mm-682mm when the bottom plate 1 is flat; when the angle of the bottom plate 1 is less than 5 degrees, the average expansion is 687.5mm-691mm, and the correction factor is: 0.987-0.989; when the angle is 5-10°, the average expansion is: 738mm-742mm: the correction factor is: 0.919-0.921; the smaller the angle value, the smaller the influence of the expansion with the angle change, and the value is closer to the value without offset; when the angle value is large, the concrete expands faster along the slope under the action of gravity, the expansion is larger, and the correction factor is smaller.

[0058] The top diameter of the slump cone 6 is 100 mm, the bottom diameter is 200 mm, and the height is 300 mm. The self-compacting concrete used in the present invention is a general self-compacting concrete, and the materials include coarse and fine aggregates, cement, admixtures, and additives.

[0059] Example 1

[0060] The self-compacting concrete working performance detection device of the present invention comprises a square base plate 1, a plurality of weighing sensors 2 are arranged at the bottom of the base plate 1, a controller 3 is arranged on the surface close to one end of the base plate 1, a chip 4 is arranged in the controller 3, a display screen 5 is arranged on the surface of the controller 3, and the chip 4 is electrically connected to the display screen 5 and the weighing sensor 2 respectively; a slump cone 6 is attached to the center of the surface of the base plate 1; a circle of infrared sensors 7 with a radius of 250 mm and a center of the base plate 1 as the center is arranged at the bottom of the base plate 1, and there are no less than two infrared sensors 7, and the infrared sensors 7 are arranged at equal intervals; a level 8 is installed at the bottom of the base plate 1, and the level 8 is electrically connected to the chip 4.

[0061] The self-compacting concrete working performance detection method of the present invention uses a self-compacting concrete working performance detection device, and the specific steps are as follows:

[0062] Step 1: Establish a rectangular coordinate system with the center of the base plate 1 as the origin in the chip 4, obtain the angle between the base plate 1 and the horizontal ground through the level 8, and set the timing logic in the chip 4;

[0063] Step 2: Place the slump cone 6 filled with self-compacting concrete at the center of the bottom plate 1, lift the slump cone 6 to 290 mm, and let the self-compacting concrete fall naturally under the action of gravity. The weighing sensor 2 transmits the gravity information to the chip 4, and the infrared sensor 7 transmits the position information of the self-compacting concrete to the chip 4;

[0064] Step 3: Calculate according to the gravity information and the angle to obtain the expansion, bulk density, expansion area and equivalent expansion of the self-compacting concrete;

[0065] Step 4: Transmit the expansion degree, bulk density, expansion area and equivalent expansion degree to the display screen 5 for display.

[0066] The calculation of the expansion area is as follows:

[0067] (1)

[0068] In formula (1), A represents the expansion area; x represents the abscissa of the rectangular coordinate system, and y represents the ordinate of the rectangular coordinate system; represents the i-th point on the horizontal axis in the rectangular coordinate system, Indicates the first point on the horizontal axis in the rectangular coordinate system. represents the i+1th point on the vertical axis in the rectangular coordinate system, Indicates the first point on the vertical axis in the rectangular coordinate system.

[0069] The calculation process of equivalent expansion is as follows:

[0070] ; (2)

[0071] In formula (2), represents the correction parameter;

[0072] The angle is 10°. It is 0.921.

[0073] Example 2

[0074] The self-compacting concrete working performance detection device of the present invention comprises a square base plate 1, a plurality of weighing sensors 2 are arranged at the bottom of the base plate 1, a controller 3 is arranged on the surface close to one end of the base plate 1, a chip 4 is arranged in the controller 3, a display screen 5 is arranged on the surface of the controller 3, and the chip 4 is electrically connected to the display screen 5 and the weighing sensor 2 respectively; a slump cone 6 is attached to the center of the surface of the base plate 1; a circle of infrared sensors 7 with a radius of 250 mm and a center of the base plate 1 as the center is arranged at the bottom of the base plate 1, and there are no less than two infrared sensors 7, and the infrared sensors 7 are arranged at equal intervals; a level 8 is installed at the bottom of the base plate 1, and the level 8 is electrically connected to the chip 4.

[0075] The self-compacting concrete working performance detection method of the present invention uses a self-compacting concrete working performance detection device, and the specific steps are as follows:

[0076] Step 1: Establish a rectangular coordinate system with the center of the base plate 1 as the origin in the chip 4, obtain the angle between the base plate 1 and the horizontal ground through the level 8, and set the timing logic in the chip 4;

[0077] Step 2: Place the slump cone 6 filled with self-compacting concrete at the center of the bottom plate 1, lift the slump cone 6 to 310 mm, and let the self-compacting concrete fall naturally under the action of gravity. The weighing sensor 2 transmits the gravity information to the chip 4, and the infrared sensor 7 transmits the position information of the self-compacting concrete to the chip 4;

[0078] Step 3: Calculate according to the gravity information and the angle to obtain the expansion, bulk density, expansion area and equivalent expansion of the self-compacting concrete;

[0079] Step 4: Transmit the expansion degree, bulk density, expansion area and equivalent expansion degree to the display screen 5 for display.

[0080] A plurality of weighing sensors 2 are arranged in a square shape at the bottom of the base plate 1 , and the plurality of weighing sensors 2 are arranged at equal intervals.

[0081] The timing logic is specifically as follows: when the gravity on the bottom plate 1 changes, the timing starts, and when the infrared sensor 7 senses the position information, the timing stops to obtain the timing time; and the timing time is displayed on the display screen 5.

[0082] The calculation of the expansion area is as follows:

[0083] (1)

[0084] In formula (1), A represents the expansion area; x represents the abscissa of the rectangular coordinate system, and y represents the ordinate of the rectangular coordinate system; represents the i-th point on the horizontal axis in the rectangular coordinate system, Indicates the first point on the horizontal axis in the rectangular coordinate system. represents the i+1th point on the vertical axis in the rectangular coordinate system, Indicates the first point on the vertical axis in the rectangular coordinate system.

[0085] The calculation process of equivalent expansion is as follows:

[0086] ; (2)

[0087] In formula (2), represents the correction parameter;

[0088] The angle is 7°. It is 0.919.

[0089] Example 3

[0090] The self-compacting concrete working performance detection device of the present invention comprises a square base plate 1, a plurality of weighing sensors 2 are arranged at the bottom of the base plate 1, a controller 3 is arranged on the surface close to one end of the base plate 1, a chip 4 is arranged in the controller 3, a display screen 5 is arranged on the surface of the controller 3, and the chip 4 is electrically connected to the display screen 5 and the weighing sensor 2 respectively; a slump cone 6 is attached to the center of the surface of the base plate 1; a circle of infrared sensors 7 with a radius of 250 mm and a center of the base plate 1 as the center is arranged at the bottom of the base plate 1, and there are no less than two infrared sensors 7, and the infrared sensors 7 are arranged at equal intervals; a level 8 is installed at the bottom of the base plate 1, and the level 8 is electrically connected to the chip 4.

[0091] The self-compacting concrete working performance detection method of the present invention uses a self-compacting concrete working performance detection device, and the specific steps are as follows:

[0092] Step 1: Establish a rectangular coordinate system with the center of the base plate 1 as the origin in the chip 4, obtain the angle between the base plate 1 and the horizontal ground through the level 8, and set the timing logic in the chip 4;

[0093] Step 2: Place the slump cone 6 filled with self-compacting concrete at the center of the bottom plate 1, lift the slump cone 6 to 300 mm, and let the self-compacting concrete fall naturally under the action of gravity. The weighing sensor 2 transmits the gravity information to the chip 4, and the infrared sensor 7 transmits the position information of the self-compacting concrete to the chip 4;

[0094] Step 3: Calculate according to the gravity information and the angle to obtain the expansion, bulk density, expansion area and equivalent expansion of the self-compacting concrete;

[0095] Step 4: Transmit the expansion degree, bulk density, expansion area and equivalent expansion degree to the display screen 5 for display.

[0096] A plurality of weighing sensors 2 are arranged in a square shape at the bottom of the base plate 1 , and the plurality of weighing sensors 2 are arranged at equal intervals.

[0097] The calculation method of the extension degree is as follows: according to the gravity information obtained by the weighing sensor 2, a gravity distribution map is drawn in the rectangular coordinate system, the two farthest gravity points in the gravity distribution map are found, and the coordinate difference of the two farthest gravity points is calculated to obtain the farthest distance; then the corrected distance perpendicular to the farthest distance is calculated, and the farthest distance and the corrected distance are averaged to obtain the extension degree.

[0098] The specific calculation of bulk density is as follows: the initial weight before timing and the final weight after expansion measurement are obtained through the weighing sensor 2, the final weight is subtracted from the initial weight to obtain the weight of the self-compacting concrete; the mass of the self-compacting concrete is compared with the volume of the slump cone 6 to obtain the actual bulk density.

[0099] The calculation of the expansion area is as follows:

[0100] (1)

[0101] In formula (1), A represents the expansion area; x represents the abscissa of the rectangular coordinate system, and y represents the ordinate of the rectangular coordinate system; represents the i-th point on the horizontal axis in the rectangular coordinate system, Indicates the first point on the horizontal axis in the rectangular coordinate system. represents the i+1th point on the vertical axis in the rectangular coordinate system, Indicates the first point on the vertical axis in the rectangular coordinate system.

[0102] The calculation process of equivalent expansion is as follows:

[0103] ; (2)

[0104] In formula (2), represents the correction parameter;

[0105] The angle is 3°. It is 0.987.

[0106] Example 4

[0107] The self-compacting concrete working performance detection device of the present invention comprises a square base plate 1, a plurality of weighing sensors 2 are arranged at the bottom of the base plate 1, a controller 3 is arranged on the surface close to one end of the base plate 1, a chip 4 is arranged in the controller 3, a display screen 5 is arranged on the surface of the controller 3, and the chip 4 is electrically connected to the display screen 5 and the weighing sensor 2 respectively; a slump cone 6 is attached to the center of the surface of the base plate 1; a circle of infrared sensors 7 with a radius of 250 mm and a center of the base plate 1 as the center is arranged at the bottom of the base plate 1, and there are no less than two infrared sensors 7, and the infrared sensors 7 are arranged at equal intervals; a level 8 is installed at the bottom of the base plate 1, and the level 8 is electrically connected to the chip 4.

[0108] The self-compacting concrete working performance detection method of the present invention uses a self-compacting concrete working performance detection device, and the specific steps are as follows:

[0109] Step 1: Establish a rectangular coordinate system with the center of the base plate 1 as the origin in the chip 4, obtain the angle between the base plate 1 and the horizontal ground through the level 8, and set the timing logic in the chip 4;

[0110] Step 2: Place the slump cone 6 filled with self-compacting concrete at the center of the bottom plate 1, lift the slump cone 6 to 310 mm, and let the self-compacting concrete fall naturally under the action of gravity. The weighing sensor 2 transmits the gravity information to the chip 4, and the infrared sensor 7 transmits the position information of the self-compacting concrete to the chip 4;

[0111] Step 3: Calculate according to the gravity information and the angle to obtain the expansion, bulk density, expansion area and equivalent expansion of the self-compacting concrete;

[0112] Step 4: Transmit the expansion degree, bulk density, expansion area and equivalent expansion degree to the display screen 5 for display.

[0113] A plurality of weighing sensors 2 are arranged in a square shape at the bottom of the base plate 1 , and the plurality of weighing sensors 2 are arranged at equal intervals.

[0114] The calculation method of the extension degree is as follows: according to the gravity information obtained by the weighing sensor 2, a gravity distribution map is drawn in the rectangular coordinate system, the two farthest gravity points in the gravity distribution map are found, and the coordinate difference of the two farthest gravity points is calculated to obtain the farthest distance; then the corrected distance perpendicular to the farthest distance is calculated, and the farthest distance and the corrected distance are averaged to obtain the extension degree.

[0115] The specific calculation of bulk density is as follows: the initial weight before timing and the final weight after expansion measurement are obtained through the weighing sensor 2, the final weight is subtracted from the initial weight to obtain the weight of the self-compacting concrete; the mass of the self-compacting concrete is compared with the volume of the slump cone 6 to obtain the actual bulk density.

[0116] The calculation of the expansion area is as follows:

[0117] (1)

[0118] In formula (1), A represents the expansion area; x represents the abscissa of the rectangular coordinate system, and y represents the ordinate of the rectangular coordinate system; represents the i-th point on the horizontal axis in the rectangular coordinate system, Indicates the first point on the horizontal axis in the rectangular coordinate system. represents the i+1th point on the vertical axis in the rectangular coordinate system, Indicates the first point on the vertical axis in the rectangular coordinate system.

[0119] The calculation process of equivalent expansion is as follows:

[0120] ; (2)

[0121] In formula (2), represents the correction parameter;

[0122] The angle is 5°, It is 0.989.

[0123] Example 5

[0124] The self-compacting concrete working performance detection device of the present invention comprises a square base plate 1, a plurality of weighing sensors 2 are arranged at the bottom of the base plate 1, a controller 3 is arranged on the surface close to one end of the base plate 1, a chip 4 is arranged in the controller 3, a display screen 5 is arranged on the surface of the controller 3, and the chip 4 is electrically connected to the display screen 5 and the weighing sensor 2 respectively; a slump cone 6 is attached to the center of the surface of the base plate 1; a circle of infrared sensors 7 with a radius of 250 mm and a center of the base plate 1 as the center is arranged at the bottom of the base plate 1, and there are no less than two infrared sensors 7, and the infrared sensors 7 are arranged at equal intervals; a level 8 is installed at the bottom of the base plate 1, and the level 8 is electrically connected to the chip 4.

[0125] The self-compacting concrete working performance detection method of the present invention uses a self-compacting concrete working performance detection device, and the specific steps are as follows:

[0126] Step 1: Establish a rectangular coordinate system with the center of the base plate 1 as the origin in the chip 4, obtain the angle between the base plate 1 and the horizontal ground through the level 8, and set the timing logic in the chip 4;

[0127] Step 2: Place the slump cone 6 filled with self-compacting concrete at the center of the bottom plate 1, lift the slump cone 6 to 310 mm, and let the self-compacting concrete fall naturally under the action of gravity. The weighing sensor 2 transmits the gravity information to the chip 4, and the infrared sensor 7 transmits the position information of the self-compacting concrete to the chip 4;

[0128] Step 3: Calculate according to the gravity information and the angle to obtain the expansion, bulk density, expansion area and equivalent expansion of the self-compacting concrete;

[0129] Step 4: Transmit the expansion degree, bulk density, expansion area and equivalent expansion degree to the display screen 5 for display.

[0130] A plurality of weighing sensors 2 are arranged in a square shape at the bottom of the base plate 1 , and the plurality of weighing sensors 2 are arranged at equal intervals.

[0131] The calculation method of the extension degree is as follows: according to the gravity information obtained by the weighing sensor 2, a gravity distribution map is drawn in the rectangular coordinate system, the two farthest gravity points in the gravity distribution map are found, and the coordinate difference of the two farthest gravity points is calculated to obtain the farthest distance; then the corrected distance perpendicular to the farthest distance is calculated, and the farthest distance and the corrected distance are averaged to obtain the extension degree.

[0132] The specific calculation of bulk density is as follows: the initial weight before timing and the final weight after expansion measurement are obtained through the weighing sensor 2, the final weight is subtracted from the initial weight to obtain the weight of the self-compacting concrete; the mass of the self-compacting concrete is compared with the volume of the slump cone 6 to obtain the actual bulk density.

[0133] The calculation of the expansion area is as follows:

[0134] (1)

[0135] In formula (1), A represents the expansion area; x represents the abscissa of the rectangular coordinate system, and y represents the ordinate of the rectangular coordinate system; represents the i-th point on the horizontal axis in the rectangular coordinate system, Indicates the first point on the horizontal axis in the rectangular coordinate system. represents the i+1th point on the vertical axis in the rectangular coordinate system, Indicates the first point on the vertical axis in the rectangular coordinate system.

[0136] The calculation process of equivalent expansion is as follows:

[0137] ; (2)

[0138] In formula (2), represents the correction parameter;

[0139] The angle is 4°. It is 0.988.

[0140] Example 6

[0141] The self-compacting concrete working performance detection device of the present invention comprises a square base plate 1, a plurality of weighing sensors 2 are arranged at the bottom of the base plate 1, a controller 3 is arranged on the surface close to one end of the base plate 1, a chip 4 is arranged in the controller 3, a display screen 5 is arranged on the surface of the controller 3, and the chip 4 is electrically connected to the display screen 5 and the weighing sensor 2 respectively; a slump cone 6 is attached to the center of the surface of the base plate 1; a circle of infrared sensors 7 with a radius of 250 mm and a center of the base plate 1 as the center is arranged at the bottom of the base plate 1, and there are no less than two infrared sensors 7, and the infrared sensors 7 are arranged at equal intervals; a level 8 is installed at the bottom of the base plate 1, and the level 8 is electrically connected to the chip 4.

[0142] The self-compacting concrete working performance detection method of the present invention uses a self-compacting concrete working performance detection device, and the specific steps are as follows:

[0143] Step 1: Establish a rectangular coordinate system with the center of the base plate 1 as the origin in the chip 4, obtain the angle between the base plate 1 and the horizontal ground through the level 8, and set the timing logic in the chip 4;

[0144] Step 2: Place the slump cone 6 filled with self-compacting concrete at the center of the bottom plate 1, lift the slump cone 6 to 310 mm, and let the self-compacting concrete fall naturally under the action of gravity. The weighing sensor 2 transmits the gravity information to the chip 4, and the infrared sensor 7 transmits the position information of the self-compacting concrete to the chip 4;

[0145] Step 3: Calculate according to the gravity information and the angle to obtain the expansion, bulk density, expansion area and equivalent expansion of the self-compacting concrete;

[0146] Step 4: Transmit the expansion degree, bulk density, expansion area and equivalent expansion degree to the display screen 5 for display.

[0147] A plurality of weighing sensors 2 are arranged in a square shape at the bottom of the base plate 1 , and the plurality of weighing sensors 2 are arranged at equal intervals.

[0148] The calculation method of the extension degree is as follows: according to the gravity information obtained by the weighing sensor 2, a gravity distribution map is drawn in the rectangular coordinate system, the two farthest gravity points in the gravity distribution map are found, and the coordinate difference of the two farthest gravity points is calculated to obtain the farthest distance; then the corrected distance perpendicular to the farthest distance is calculated, and the farthest distance and the corrected distance are averaged to obtain the extension degree.

[0149] The specific calculation of bulk density is as follows: the initial weight before timing and the final weight after expansion measurement are obtained through the weighing sensor 2, the final weight is subtracted from the initial weight to obtain the weight of the self-compacting concrete; the mass of the self-compacting concrete is compared with the volume of the slump cone 6 to obtain the actual bulk density.

[0150] The calculation of the expansion area is as follows:

[0151] (1)

[0152] In formula (1), A represents the expansion area; x represents the abscissa of the rectangular coordinate system, and y represents the ordinate of the rectangular coordinate system; represents the i-th point on the horizontal axis in the rectangular coordinate system, Indicates the first point on the horizontal axis in the rectangular coordinate system. represents the i+1th point on the vertical axis in the rectangular coordinate system, Indicates the first point on the vertical axis in the rectangular coordinate system.

[0153] The calculation process of equivalent expansion is as follows:

[0154] ; (2)

[0155] In formula (2), represents the correction parameter;

[0156] The angle is 8°. It is 0.920.

Claims

1. A method for detecting the working performance of self-compacting concrete, characterized in that: The method uses a self-compacting concrete working performance detection device of the following structure, comprising a square base plate (1), a plurality of weighing sensors (2) being arranged at the bottom of the base plate (1), a controller (3) being arranged on a surface close to one end of the base plate (1), a chip (4) being arranged inside the controller (3), a display screen (5) being arranged on the surface of the controller (3), and the chip (4) being electrically connected to the display screen (5) and the weighing sensor (2) respectively; a slump cone (6) being attached to the center of the surface of the base plate (1); a circle of infrared sensors (7) with a radius of 250 mm and the center of the base plate (1) being arranged at the bottom of the base plate (1), the number of the infrared sensors (7) being no less than two, and the infrared sensors (7) being arranged at equal intervals; a level (8) being installed at the bottom of the base plate (1), and the level (8) being electrically connected to the chip (4); the plurality of weighing sensors (2) forming a square at the bottom of the base plate (1), and the plurality of weighing sensors (2) being arranged at equal intervals; The specific steps of this method are as follows: Step 1: Establish a rectangular coordinate system with the center of the base plate (1) as the origin in the chip (4), obtain the angle formed by the base plate (1) and the horizontal ground through a level meter (8), and set timing logic in the chip (4); Step 2: placing a slump cone (6) filled with self-compacting concrete at the center of the bottom plate (1), lifting the slump cone (6) to 290 mm-310 mm, and allowing the self-compacting concrete to fall naturally under the action of gravity, the weighing sensor (2) transmits gravity information to the chip (4), and the infrared sensor (7) transmits position information of the self-compacting concrete to the chip (4); Step 3: Calculate according to the gravity information and the angle to obtain the expansion, bulk density, expansion area and equivalent expansion of the self-compacting concrete; Step 4, the expansion degree, bulk density, expansion area and equivalent expansion degree are transmitted to the display screen (5) for display; The method for calculating the degree of expansion is as follows: based on the gravity information obtained by the weighing sensor (2), a gravity distribution diagram is drawn in the rectangular coordinate system, the two farthest gravity points in the gravity distribution diagram are found, and the coordinate difference of the two farthest gravity points is calculated to obtain the farthest distance; the line connecting the two farthest gravity points is taken as the base line, a line segment perpendicular to the center of the base line is found as the calibration line, the two farthest gravity points on the calibration line are subtracted to obtain the corrected distance, and the farthest distance and the corrected distance are averaged to obtain the degree of expansion; The specific calculation of the bulk density is as follows: obtaining the initial weight before timing and the final weight after completion of the expansion measurement by means of a weighing sensor (2), subtracting the final weight from the initial weight to obtain the weight of the self-compacting concrete; comparing the mass of the self-compacting concrete with the volume of the slump cone (6) to obtain the actual bulk density; The calculation of the expansion area is specifically as follows: （1） In formula (1), A represents the expansion area; represents the horizontal coordinate of the i-th point in the rectangular coordinate system, represents the horizontal coordinate of the first point in the rectangular coordinate system, represents the ordinate of the i+1th point in the rectangular coordinate system, Represents the ordinate of the first point in the rectangular coordinate system.

2. The method for detecting working performance of self-compacting concrete according to claim 1, characterized in that: The timing logic is specifically as follows: when the gravity on the bottom plate (1) changes, timing starts, and when the infrared sensor (7) senses the position information, timing stops to obtain the timing time; and the timing time is displayed on the display screen (5).

3. The method for detecting working performance of self-compacting concrete according to claim 1, characterized in that: The calculation process of the equivalent expansion is specifically as follows: ； （2） In formula (2), represents the correction parameter; When the angle is not greater than 5°, is 0.987-0.989; when the angle is greater than 5° and not greater than 10°, It is 0.919-0.921.

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