Concrete slump measuring device

Abstract

The present application relates to the technical field of concrete slump detection, and particularly relates to a concrete slump measuring device, which comprises a bottom plate, an anti-skid washer arranged on the bottom plate, a slump cylinder arranged on the anti-skid washer, and the slump cylinder being filled with concrete to be tested; an attached vibrator is symmetrically arranged on the outer periphery of the slump cylinder; a vertical test support is fixed on the bottom plate, a measuring rod is arranged above the test support, the measuring rod can rotate around the test support, an infrared range finder and a laser scanning instrument which can move along the length direction of the measuring rod are arranged on the measuring rod, and the test personnel do not need to step on the pedal during loading; the attached vibrator can reduce the labor amount of the test personnel and avoid the inaccuracy of the test structure caused by manual vibration; meanwhile, the infrared range finder and the laser scanning instrument can move horizontally along the measuring rod to the accurate measuring position, the accuracy of the measuring structure is ensured, and the test result can be read in real time.

Description

Technical Field

[0001] This invention relates to the field of concrete slump testing technology, and more particularly to a concrete slump measuring device. Background Technology

[0002] Concrete slump is used to characterize the workability of concrete and is an important indicator to ensure the normal progress of concrete construction. The slump test method described in the "Standard for Test Methods of Performance of Ordinary Concrete Mixtures" (GB / T 50080-2016) is suitable for determining the slump of concrete mixtures with a maximum nominal aggregate size of not more than 40 mm and a slump of not less than 10 mm.

[0003] As building structures increasingly trend towards taller and larger structures, mass concrete is widely used. After pouring, mass concrete generates a significant amount of heat of hydration, which can easily cause cracking. To mitigate this, while maintaining mechanical properties, using multi-graded, large-particle-size concrete aggregates can reduce the amount of cementitious materials used, lower the heat of hydration, and thus reduce the risk of concrete cracking.

[0004] Existing slump testing devices require manual vibration and manual measurement of slump height and spread, resulting in low testing efficiency and a high risk of errors. Furthermore, the specifications do not provide relevant technical devices for three-grade concrete with large aggregate sizes of 5mm-20mm, 20mm-40mm, and 40mm-80mm. Therefore, based on practical engineering needs, a three-grade concrete slump testing device was designed to accurately test the slump and spread of concrete with large aggregate sizes. Summary of the Invention

[0005] To address the shortcomings of the existing technology, the present invention provides a three-grade concrete slump measuring device with a reasonable structure and high measurement accuracy.

[0006] This invention provides a concrete slump measuring device, comprising:

[0007] The base plate is equipped with anti-slip pads.

[0008] A slump cone is placed on the anti-slip pad, and the inside of the slump cone is filled with the concrete to be tested.

[0009] The outer periphery of the slump cone is symmetrically provided with attached vibrators.

[0010] A vertical test bracket is fixed on the base plate, and a horizontal measuring rod is set above the test bracket. The measuring rod can rotate around the test bracket, and an infrared rangefinder and a laser scanner that can move along its length are set on the measuring rod. The infrared rangefinder is used to measure the slump of the concrete to be tested; the laser scanner is used to measure the spread of the concrete to be tested.

[0011] The test bracket is equipped with a display for displaying the measurement results of the infrared rangefinder and the laser scanner in real time.

[0012] The concrete slump measuring device of this technical solution has a slump cylinder fixed to the base plate by anti-slip pads. When loading the material, the test personnel do not need to step on the pedals on both sides of the cylinder. The attached vibrator can reduce the workload of the test personnel and avoid inaccurate test structures caused by manual vibration. At the same time, the infrared measuring instrument and the laser scanning instrument can move horizontally along the measuring rod to the accurate measuring position, ensuring the accuracy of the measured structure and reading the test results in real time.

[0013] In some embodiments of this application, the test bracket is provided with two annular limiting plates distributed vertically above it. The distance between the two limiting plates is adapted to the height of the measuring rod. One end of the measuring rod is provided with a fixing collar, which is fitted onto the test bracket between the two limiting plates, so that the measuring rod can rotate around the test bracket.

[0014] In some embodiments of this application, a sliding sleeve is fitted onto the upper part of the measuring rod, and the inner diameter of the sliding sleeve is adapted to the outer diameter of the measuring rod, so that the sliding sleeve can move back and forth along the measuring rod;

[0015] The infrared rangefinder and the laser scanner are fixed to the bottom of the sliding sleeve. When measuring the slump, the infrared rangefinder can move above the highest point of the concrete after the collapse to accurately measure the slump. When measuring the expansion, the laser scanner moves to the center position of the expanded concrete to accurately measure the average diameter after expansion.

[0016] In some embodiments of this application, a positioning hole is provided in the middle of the anti-slip washer, and the bottom of the slump cylinder is placed in the positioning hole to prevent the slump cylinder from moving. A cylindrical limiting sleeve is provided on the circumference of the positioning hole, the diameter of the limiting sleeve is adapted to the diameter of the bottom of the slump cylinder, and the limiting sleeve plays a guiding role during the lifting of the slump cylinder.

[0017] In some embodiments of this application, the slump cylinder includes an outer cylinder and an inner cylinder built inside the outer cylinder. The outer cylinder includes an upper hollow conical cylinder and a lower positioning cylinder. The diameter of the positioning cylinder is the same as the diameter of the limiting sleeve. The inner cylinder has a cylindrical structure that is thinner at the top and thicker at the bottom, and the maximum diameter of the bottom of the inner cylinder is the same as the diameter of the positioning cylinder. The inner cylinder has a cavity for holding the concrete to be tested.

[0018] In some embodiments of this application, the attached vibrator is uniformly fixed on the clamping ring, and the clamping ring is detachably fixed at the middle position of the outer cylinder to uniformly vibrate the concrete to be tested.

[0019] The attached vibrator is electrically connected to a controller, which is integrated into the display. The controller adjusts the vibration time of the attached vibrator to reduce inaccurate slump test results caused by inconsistent vibration time or number of vibrations during manual vibration.

[0020] In some embodiments of this application, the upper opening diameter of the inner cylinder is 200mm, the lower opening diameter is 350mm, and the height is 450mm, which can be used to test the slump of large-particle-size, three-grade concrete with diameters of 5mm-20mm, 20mm-40mm, and 40mm-80mm.

[0021] In some embodiments of this application, bubble levels are provided on two adjacent sides of the base plate to indicate whether the base plate is level.

[0022] The bottom of the base plate is evenly provided with height-adjustable feet, which can be adjusted to make the base plate level.

[0023] In some embodiments of this application, the outer cylinder is symmetrically provided with handles and a temperature sensor is also provided to measure the concrete temperature during the slump test and display it on a display.

[0024] Based on the above technical solutions, the concrete slump measuring device of the present invention, the infrared measuring instrument and the laser scanning instrument can directly measure the slump and spread. The testing process is convenient, fast and accurate, and the test results can be read in real time. The slump cylinder is fixed to the base plate by the anti-slip pad. When loading the material, the test personnel do not need to step on the pedals on both sides of the cylinder. The attached vibrator can reduce the workload of the test personnel and avoid the inaccuracy of the test structure caused by manual vibration.

[0025] The anti-slip washer's limiting sleeve secures the slump cone and acts as a guide during the lifting of the slump cone;

[0026] The dimensions of the inner cylinder were modified to accommodate the measurement of slump and spread of large-diameter concrete with a maximum particle size of 80mm. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the concrete slump measuring device according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the anti-slip washer according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic cross-sectional view of the slump cone according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the test bracket according to an embodiment of the present invention.

[0032] In the diagram, 10 is the base plate; 11 is the bubble level; 12 is the foot; 20 is the anti-slip washer; 21 is the positioning hole; 22 is the limiting sleeve; 30 is the slump cone; 31 is the outer cylinder; 311 is the conical cylinder; 312 is the positioning cylinder; 32 is the inner cylinder; 33 is the handle; 40 is the attached vibrator; 41 is the tightening ring; 50 is the test bracket; 501 is the limiting plate; 51 is the measuring rod; 511 is the fixing collar; 52 is the infrared rangefinder; 53 is the laser scanner; 54 is the display; and 55 is the sliding sleeve. Detailed Implementation

[0033] The technical solutions in 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 a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] This embodiment provides a concrete slump measuring device, such as... Figures 1-3 As shown, including;

[0038] The base plate 10 is equipped with anti-slip washers 20. Bubble levels 11 are installed on two adjacent sides of the base plate 10 to indicate whether the base plate 10 is level. Adjustable feet 12 are installed at the four corners of the bottom of the base plate 10. The feet 12 can be spiral leveling feet and are made of stainless steel bolts. The base plate 10 is adjusted to be level by adjusting the bolts. In this embodiment, the base plate 10 is a stainless steel plate with a thickness of 10mm and a size of 1000mm×1000mm.

[0039] During testing, the anti-slip pad 20 is placed on the base plate 10. At the end of the test, the anti-slip pad 20 is removed for easy cleaning. The anti-slip pad 20 is a circular plate structure with a rubber anti-slip pad (not shown in the figure) at its bottom. When placed on the base plate 10, the anti-slip pad 20 will not slide, eliminating the need to step on a foot pedal to prevent displacement of the slump cone when filling it with concrete for testing, thus saving effort. A positioning hole 21 is located in the center of the anti-slip pad 20, and a cylindrical limiting sleeve 22 is provided on the circumference of the positioning hole 21. The bottom of the slump cone 30 runs downwards along the limiting sleeve 22 and engages with the positioning hole 21.

[0040] In some embodiments, the slump cylinder 30 includes an outer cylinder 31 and an inner cylinder 32 built inside the outer cylinder 31. The outer cylinder 31 includes an upper hollow conical cylinder 311 and a lower positioning cylinder 312. The diameter of the positioning cylinder 312 is the same as the diameter of the limiting sleeve 22 on the anti-slip washer 20. The inner cylinder 32 has a cylindrical structure that is thinner at the top and thicker at the bottom, and the maximum diameter of the bottom of the inner cylinder 32 is the same as the diameter of the positioning cylinder 312. A cavity for holding the concrete to be tested is formed inside the inner cylinder 32. The top of the conical cylinder 311 of the outer cylinder 31 and the top of the inner cylinder 32 are closed and fixed, and the bottom of the positioning cylinder 312 of the outer cylinder 31 and the inner cylinder 32 are closed and fixed.

[0041] The positioning cylinder 312 is placed in the positioning hole 21 to prevent the slump cylinder 30 from moving during loading. The limiting sleeve 22 plays a guiding role during the lifting of the slump cylinder 30, thereby improving the accuracy of the test.

[0042] Multiple attached vibrators 40 are evenly distributed in the middle of the outer cylinder 31. Direct use of attached vibrators reduces the workload of test personnel and can fix the vibration time, reducing inaccurate slump test results caused by inconsistent vibration time or number of vibrations. The attached vibrators 40 are fixed to the clamping ring 41, which is detachably fixed to the outer cylinder 31. The attached vibrators 40 are turned on to uniformly vibrate the concrete to be tested in the inner cylinder 32. After use, the attached vibrators 40 are turned off, and the clamping ring 41 and the attached vibrators 40 are removed from the outer cylinder 31 to facilitate cleaning of the slump test cylinder.

[0043] Handles 33 are symmetrically arranged on the outer cylinder 31, and a temperature sensor (not shown in the figure) is also provided. The temperature sensor measures the concrete temperature during the slump test.

[0044] To make the test structure more accurate, a vertical test bracket 50 is fixed on the base plate 10. A horizontal measuring rod 51 is set above the test bracket 50. The measuring rod 51 can rotate around the test bracket 50 in the horizontal plane. An infrared rangefinder 52 and a laser scanner 53 that can move along its length are set on the measuring rod 51. The infrared rangefinder 52 is used to measure the slump of the concrete to be tested; the laser scanner 53 is used to measure the spread of the concrete to be tested.

[0045] Meanwhile, a display 54 is installed on the test bracket 50 to display the measurement results of the infrared rangefinder 52 and the laser scanner 53 in real time;

[0046] Specifically, annular limiting plates 501 are arranged vertically above the test bracket 50. The distance between the two limiting plates 501 is adapted to the height of the measuring rod 51. A fixing collar 511 is provided at the end of the measuring rod 51 near the test bracket 50. The fixing collar 511 is fitted onto the test bracket 50 between the two limiting plates 501, so that the measuring rod 51 can rotate around the test bracket 50.

[0047] A sliding sleeve 55 is fitted onto the upper part of the measuring rod 51. The inner diameter of the sliding sleeve 55 is adapted to the outer diameter of the measuring rod 51, allowing the sliding sleeve 55 to move back and forth along the measuring rod 51. The infrared rangefinder 52 and the laser scanner 53 are fixed to the bottom of the sliding sleeve 55. When measuring the slump, the infrared rangefinder 52 can move above the highest point of the concrete after slump to accurately measure the slump. When measuring the spread, the laser scanner 53 moves to the center position of the expanded concrete to accurately measure the average diameter after expansion.

[0048] The attached vibrator 40 is electrically connected to a controller. The display 54 integrates a controller for controlling the attached vibrator. The display 54 also has a time adjustment button for adjusting the vibration time and a measurement start button, controlling the vibration time of the attached vibrator to reduce inaccurate slump test results caused by inconsistent vibration time or number of vibrations during manual compaction. The display 54 can display temperature, slump, spread, and time.

[0049] To test the slump of large-particle-size three-grade concrete, the three-grade mix uses 5mm-20mm, 20mm-40mm, and 40mm-80mm. The upper opening diameter of the inner cylinder 32 is 200mm, the lower opening diameter is 350mm, and the height is 450mm, which can be used to test the slump of large-particle-size concrete. At the same time, the diameters of the positioning hole 21, the limiting sleeve 22, and the positioning cylinder 312 are also 350mm.

[0050] During the slump test, first adjust the height of the base 12 to ensure that the bubbles in the two bubble levels 11 on the base plate 10 are centered, thus ensuring that the base plate 10 is level. Place the anti-slip washer 20 on the base plate 10, and wet the inner wall of the inner cylinder 32 of the slump cylinder 30 with a damp towel. Place the outer cylinder 31 inside the limiting sleeve 22 of the anti-slip washer 20. The slump cylinder 30 will automatically slide down along the limiting sleeve 22 to the positioning hole 21 and contact the base plate 10, filling the inner cylinder 32 with material. At this time, the fixed position of the slump cylinder will not shift. The concrete mixture is evenly filled into the inner cylinder 32. After filling, turn on the attached vibrator 40 to start vibration. According to the set vibration time, after vibration is completed, lift the slump cylinder 30 at a uniform speed using the handle 33. The lifting process is controlled within 3s to 7s. Then, remove the anti-slip washer 20. When measuring the slump of the concrete mixture, rotate the test bracket 50 so that the infrared rangefinder 52 is located at the highest point after the concrete mixture has flowed; when measuring the spread, the laser scanner 53 is moved to the center position after the concrete has spread, accurately measuring the average diameter after spread, and the test start button on the display 54 is clicked, and the data results are directly displayed on the display 54.

[0051] Based on the above technical solutions, the concrete slump measuring device of the present invention, with its infrared measuring instrument and laser scanning instrument, can directly measure slump and spread. The testing process is convenient, fast, and accurate, and the test results can be read in real time. The slump cylinder is fixed to the base plate by an anti-slip pad, eliminating the need for the test personnel to step on the pedals on both sides of the cylinder during loading. The attached vibrator can reduce the workload of the test personnel and avoid inaccurate test structures caused by manual vibration. The limiting sleeve of the anti-slip pad fixes the slump cylinder and plays a guiding role during the lifting of the slump cylinder. The dimensions of the inner cylinder have been modified to accommodate the measurement of slump and spread of large-particle-size concrete with a maximum particle size of 80mm.

[0052] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A concrete slump measuring device, characterized in that: include: The base plate is equipped with anti-slip pads. A slump cone is placed on the anti-slip pad, and the inside of the slump cone is filled with the concrete to be tested. The outer periphery of the slump cone is symmetrically provided with attached vibrators. A vertical test bracket is fixed on the base plate, and a horizontal measuring rod is set above the test bracket. The measuring rod can rotate around the test bracket, and an infrared rangefinder and a laser scanner that can move along its length are set on the measuring rod. The infrared rangefinder is used to measure the slump of the concrete to be tested; the laser scanner is used to measure the spread of the concrete to be tested. The test bracket is equipped with a display for displaying the measurement results of the infrared rangefinder and the laser scanner in real time.

2. The concrete slump measuring device according to claim 1, characterized in that, The test bracket is provided with two annular limiting plates distributed vertically above it. The distance between the two limiting plates is adapted to the height of the measuring rod. One end of the measuring rod is provided with a fixing collar, which is fitted onto the test bracket between the two limiting plates, so that the measuring rod can rotate around the test bracket.

3. The concrete slump measuring device according to claim 2, characterized in that, The measuring rod is fitted with a sliding sleeve, the inner diameter of which is adapted to the outer diameter of the measuring rod, so that the sliding sleeve can move back and forth along the measuring rod. The infrared rangefinder and the laser scanner are fixed to the bottom of the sliding sleeve. When measuring the slump, the infrared rangefinder can move to the top of the highest point of the concrete after the slump. When measuring the spread, the laser scanner moves to the center of the concrete after it has spread.

4. The concrete slump measuring device according to claim 1, characterized in that, The anti-slip washer has a positioning hole in the middle, and the bottom of the slump cylinder is placed in the positioning hole. A cylindrical limiting sleeve is provided on the circumference of the positioning hole. The diameter of the limiting sleeve is adapted to the diameter of the bottom of the slump cylinder, and the limiting sleeve plays a guiding role during the lifting of the slump cylinder.

5. The concrete slump measuring device according to claim 4, characterized in that, The slump test cylinder includes an outer cylinder and an inner cylinder built inside the outer cylinder. The outer cylinder includes an upper hollow conical cylinder and a lower positioning cylinder. The diameter of the positioning cylinder is the same as the diameter of the limiting sleeve. The inner cylinder has a cylindrical structure that is thinner at the top and thicker at the bottom, and the maximum diameter of the bottom of the inner cylinder is the same as the diameter of the positioning cylinder. The inner cylinder has a cavity for holding the concrete to be tested.

6. The concrete slump measuring device according to claim 5, characterized in that, The attached vibrator is evenly fixed on the clamping ring, which is detachably fixed at the middle position of the outer cylinder to uniformly vibrate the concrete to be tested. The attached vibrator is electrically connected to a controller, which is integrated into the display. The controller adjusts the vibration time of the attached vibrator.

7. The concrete slump measuring device according to claim 5, characterized in that, The inner cylinder has an upper opening diameter of 200mm, a lower opening diameter of 350mm, and a height of 450mm.

8. The concrete slump measuring device according to claim 1, characterized in that, Bubble levels are installed on two adjacent sides of the base plate to indicate whether the base plate is level. The bottom of the base plate is evenly provided with height-adjustable feet.

9. The concrete slump measuring device according to claim 5, characterized in that, Handles are symmetrically arranged on the outer cylinder. The outer cylinder is also equipped with a temperature sensor for measuring the concrete temperature during the slump test and displaying it on the monitor.

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