Concrete mixture gap trafficability testing device
By designing a concrete mixture gap passivity test device including J ring, slump cylinder, guide bar, calibration ring, guide insert bar and center ring, the problem that existing equipment is difficult to control the concentricity of the slump cylinder and the J ring and raise height during operation, the accuracy and controllability of the test are achieved.
Patent Information
- Application Number
- CN202420841573.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-22
AI Technical Summary
The existing concrete mixture gap passability test equipment is difficult to control during operation, and the slump cylinder is concentric with the J ring, and the lifting height is not easy to control, resulting in poor test accuracy.
A concrete mixture gap passivity test device is designed, using components such as J ring, slump cylinder, guide bar, calibration ring, guide insert bar and center ring. The vertical lifting of the slump cylinder is achieved through the guide bar and guide channel, and the lifting height is adjusted through the limit frame and locking bolts.
This device makes the operation process easier to meet the test regulations, improves the accuracy of the test, ensures concentric placement of the slump cylinder and the J ring and precise control of lifting height.
Smart Images
Figure CN222580108U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a concrete mixture gap passability test device, belonging to the technical field of building material detection. Background Art
[0002] The plastic mixture that has not yet solidified and hardened and is made by mixing the various components of concrete in a certain proportion is called concrete mixture. Self-compacting concrete is a kind of high-performance concrete. Its mixture has high fluidity and does not disperse or bleed. It can fill the space in the formwork by its own weight. It has good filling properties for dense steel bars and complex structures. It can form a dense concrete structure without vibration (or slight tamping), and it also has good mechanical properties and durability.
[0003] The workability of self-compacting concrete mixtures includes the following four aspects: fluidity, anti-segregation, gap permeability and self-filling. Gap permeability is the ability of concrete mixtures to resist blockage, which is dominated by fluidity and anti-segregation and affected by the external conditions of concrete. It is the core content of the workability of the mixture.
[0004] The gap passability test method is carried out in accordance with the provisions of the gap passability test in Part 8 of the GB / T50080-2016 standard for performance test methods of ordinary concrete mixtures. The test equipment includes a slump cone, a J ring, and a base plate. During the test, the slump cone is required to be placed in the center of the base plate in the positive direction and should be concentric with the J ring. The slump cone needs to be lifted vertically and steadily to a height of 250mm±50mm. However, it is not easy to control the concentricity of the slump cone and the J ring during operation, nor is it easy to control the lifting height of the slump cone.
[0005] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content
[0006] In order to solve the problems existing in the prior art, the utility model provides a concrete mixture gap passability test device, which makes it easier for the operation process to meet the test regulations and improves the test accuracy.
[0007] The utility model achieves the above-mentioned purpose by adopting the following technical solutions:
[0008] A concrete mixture gap passability test device, comprising:
[0009] A J ring, wherein the J ring is composed of a circular ring and a plurality of round steels uniformly fixed at the bottom of the circular ring along the circumferential direction;
[0010] Slump cone;
[0011] Two guide rods, the two guide rods are relatively fixed on the top of the ring, and the two guide rods are provided with guide channels extending downward from the top surface;
[0012] A calibration ring, wherein the inner wall of the calibration ring is a conical surface and has the same taper as the outer wall of the slump cone, and two guide rods are arranged opposite to each other on the outer side wall of the calibration ring, and the two guide rods pass through the guide channels on the two guide rods respectively;
[0013] A centering ring, wherein the inner wall of the centering ring is a conical surface and has the same taper as the outer wall of the slump cone, the inner hole diameter of the centering ring is larger than the inner hole diameter of the calibration ring, and the outer diameter of the centering ring is not larger than the inner diameter of the circular ring.
[0014] Optionally, the calibration ring and the centering ring are both formed by two semicircular rings mating together, and the mating surfaces of the two semicircular rings are attracted to each other through a pair of magnets.
[0015] Optionally, the concrete mixture gap passability test device provided by the utility model further includes:
[0016] A limit frame, wherein the limit frame is sleeved on the outside of the guide pole;
[0017] A locking bolt passes through the rear end of the limiting frame and is tightened on the guide pole.
[0018] Optionally, the guide pole is provided with vertically arranged scales.
[0019] Optionally, the centering ring is composed of an inner ring, a middle ring, and an outer ring which are connected in sequence, and the thickness of the inner ring and the outer ring is greater than that of the middle ring.
[0020] Optionally, two handles are arranged opposite to each other on the outer wall of the slump cone, and the centering ring is sleeved on the outer side of the slump cone below the handles.
[0021] Optionally, a horizontal line connecting the two handles is perpendicular to a horizontal line connecting the two guide poles.
[0022] The beneficial effects of this application include but are not limited to:
[0023] The concrete mixture gap passability testing device provided by the utility model makes it easier for the operation process to meet the test regulations and improves the test accuracy, which is specifically embodied in that: the slump cone and the J ring can be conveniently placed concentrically by using the centering ring; after the limit frame is adjusted and fixed according to the initial height and the lifting height of the slump cone, when the slump cone is lifted to the set height, the guide rod will be blocked by the limit frame and cannot move upward, thereby facilitating the control of the lifting height of the slump cone; in the process of lifting the slump cone, the guide rod moves along the guide channel on the guide mark rod, and the slump cone can be easily controlled to be lifted vertically.
[0024] The test device provided by the utility model ingeniously utilizes the conical surface structure of the slump cone to clamp the calibration ring and the centering ring on the outside of the slump cone, does not require additional fixing components, can be applicable to slump cones of different outer diameters, has strong adaptability, and is easy to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0026] Figure 1 A three-dimensional diagram of a concrete mixture gap passability test device provided by the utility model;
[0027] Figure 2 A three-dimensional diagram of the concrete mixture gap passability test device provided by the utility model after the slump cone is removed;
[0028] Figure 3 A cross-sectional view of a concrete mixture gap passability test device provided by the utility model;
[0029] In the figure, 100, J ring; 110, circular ring; 120, round steel; 200, slump cone; 210, handle; 300, guide pole; 310, guide channel; 320, scale; 400, calibration ring; 410, guide rod; 500, centering ring; 510, inner ring; 520, middle ring; 530, outer ring; 610, limit frame; 620, locking bolt; 700, magnet pair. DETAILED DESCRIPTION
[0030] In order to clearly illustrate the technical features of the present invention, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.
[0031] It should be noted that many specific details are described in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.
[0032] like Figure 1-Figure 3 As shown in , the concrete mixture gap passability test device provided by the utility model includes a J ring 100, a slump cone 200, a guide rod 300, a calibration ring 400, a guide rod 410, a centering ring 500 and the like.
[0033] Specifically, the J ring 100 is composed of a circular ring 110 and a plurality of round steel bars 120 uniformly fixed at the bottom of the circular ring 110 along the circumferential direction. The J ring 100 should be made of steel or stainless steel, wherein the center diameter of the circular ring 110 should be 300 mm, the thickness should be 25 mm, and 16 round steel bars 120 should be locked on the circular ring 110 using nuts and washers, the diameter of the round steel bars 120 should be 16 mm, the height should be 100 mm; the center spacing of the round steel bars 120 should be 58.9 mm.
[0034] The slump cone 200 should not have a foot pedal, and the equipment and dimensions should comply with the provisions of the current industry standard "Concrete Slump Tester" JG / T248. The upper inner diameter of the slump cone 200 is Φ100mm, the lower inner diameter is Φ200mm, the cone height is 300mm, and the error should be 1mm. When using integral casting processing, the cone wall thickness should not be less than 4mm, and when using integral stamping processing, the cone wall thickness should not be less than 1.5mm. In actual production, the outer diameter of the slump cones of different manufacturers will be different.
[0035] Two guide rods 300 are relatively fixed on the top of the ring 110, and guide channels 310 extending downward from the top surface are provided on the two guide rods 300. Specifically, the guide rods 300 can be welded or connected to the ring 110 by bolts.
[0036] The inner wall of the calibration ring 400 is a conical surface and has the same taper as the outer wall of the slump cone 200. Two guide rods 410 are arranged on the outer side wall of the calibration ring 400. The two guide rods 410 pass through the guide channels 310 on the two guide bars 300. The guide rods 410 and the guide channels 310 are matched with each other in a clearance manner, which ensures that the guide rods 410 move smoothly and can also constrain the guide rods 410 from shaking in the guide channels 310. In the process of lifting the slump cone 200, the guide rods 410 move along the guide channels 310 on the guide bars 300, so that the slump cone 200 can be easily controlled to be lifted vertically.
[0037] The inner wall of the centering ring 500 is a conical surface and has the same taper as the outer wall of the slump cone 200. The inner diameter of the centering ring 500 is larger than the inner diameter of the calibration ring 400, so that the centering ring 500 is located below the calibration ring 400. The outer diameter of the centering ring 500 is not larger than the inner diameter of the circular ring 110. It should be noted that the term "not larger than" here actually means that the outer diameter of the centering ring 500 is slightly smaller than the inner diameter of the circular ring 110, so that the outer wall of the centering ring 500 and the inner wall of the circular ring 110 are in clearance, and the centering ring 500 can move freely through the circular ring 110, but can also be placed concentrically against the circular ring 110.
[0038] During the test, after the slump cone 200 is placed on the bottom plate, the centering ring 500 is put on the outside of the slump cone 200. The centering ring 500 slides down along the outer wall of the slump cone 200 for a certain distance and then stops. During the sliding process of the centering ring 500, the horizontal position of the slump cone 200 is adjusted so that the outer wall of the centering ring 500 is close to the inner wall of the circular ring 110, so that the slump cone 200 and the J-ring 100 can be placed concentrically.
[0039] The outer wall of the slump cone 200 is usually fixed with a handle 210 to facilitate lifting the slump cone 200, but the provision of the handle 210 will hinder the installation of the calibration ring 400 and the centering ring 500. Therefore, in a preferred embodiment, the calibration ring 400 and the centering ring 500 are both formed by two semicircular rings, and the mating surfaces of the two semicircular rings are mutually attracted by the magnet pair 700. During operation, the two semicircular rings can be clamped onto the slump cone 200 from both sides in a separated state, which is convenient and quick.
[0040] Furthermore, the concrete mixture gap passability test device provided by the utility model also includes a limit frame 610 and a locking bolt 620. Among them, the limit frame 610 is sleeved on the outer side of the guide mark 300, and the locking bolt 620 passes through the rear end of the limit frame 610 and is pressed against the guide mark 300. Before the test, first loosen the locking bolt 620 to remove the limit frame 610. After installing the slump cone 200, the centering ring 500, and the calibration ring 400 (with the guide plug 410), the limit frame 610 is reinstalled, and the limit frame 610 is re-fixed according to the initial position and lifting height of the slump cone 200. In this way, when the slump cone 200 is lifted to the set height, the guide plug 410 will be blocked by the limit frame 610 and cannot move up, thereby facilitating the control of the lifting height of the slump cone 200.
[0041] In order to facilitate obtaining the position of the guide rod 410 , it is preferred that vertically arranged scales 320 are provided on the guide rod 300 .
[0042] The outer diameters of the slump cones 200 produced by different manufacturers may be different. The test device provided by the utility model cleverly utilizes the conical structure of the slump cone 200 to clamp the calibration ring 400 and the centering ring 500 on the outside of the slump cone 200. No additional fixing components are required. The test device can be applied to slump cones 200 of different outer diameters, has strong adaptability, and is easy to disassemble.
[0043] Furthermore, in order to increase the contact surface between the centering ring 500 and the slump cone 200 so that the centering ring 500 can be securely installed on the slump cone 200, and to increase the height of the outer edge of the centering ring 500 so that the centering ring 500 can cooperate with the circular ring 110 in a larger height range, it is preferred that the centering ring 500 is composed of an inner ring 510, a middle ring 520, and an outer ring 530 connected in sequence, and the thickness of the inner ring 510 and the outer ring 530 is greater than that of the middle ring 520, which can save raw materials for making the centering ring 500 while meeting the above requirements. The heights of the round steel 120 and the circular ring 110 are fixed, and the position of the centering ring 500 can be obtained according to the heights of the round steel 120 and the circular ring 110. In actual production, the range of the inner diameter of the centering ring 500 can be determined according to the approximate position of the centering ring 500 on the slump cone 200.
[0044] Furthermore, the centering ring 500 is sleeved on the outer side of the slump cone 200 below the handle 210 to prevent the centering ring 500 from interfering with the operator's grip on the handle 210 .
[0045] Furthermore, the horizontal line connecting the two handles 210 is perpendicular to the horizontal line connecting the two guide rods 300. When the guide rod 410 is set to a square shape, when the left and right hands hold the two handles 210 respectively to lift the slump cone 200, the guide rod 410 cannot rotate around the rod axis due to the restrictions of its shape and the guide channel 310, thereby avoiding the slump cone 200 from tilting due to inconsistent lifting speeds of the two handles 210.
[0046] Combined with the provisions of Part 8 Gap Passability Test in GB / T50080-2016 Standard for Performance Test Methods of Ordinary Concrete Mixtures, the test using the test device provided by the utility model should be carried out in the following steps:
[0047] (1) The bottom plate, J-ring 100 and the inner wall of the slump cone 200 should be moist without visible water; the bottom plate should be placed on a solid horizontal surface, and the J-ring 100 should be placed in the center of the bottom plate. The bottom plate is not shown in the figure. The bottom plate should be made of steel plate with a plane size of not less than 1500mm×1500mm and a thickness of not less than 3mm. Its maximum deflection should not be greater than 3mm.
[0048] (2) Loosen the locking bolt 620 and remove the limit frame 610;
[0049] (3) The slump cone 200 is placed forwardly at the center of the base plate, and the slump cone 200, the centering ring 500, and the calibration ring 400 are installed. The guide rod 410 on the calibration ring 400 is placed in the guide channel 310 of the guide rod 300. The centering ring 500 slides down along the outer wall of the slump cone 200 for a certain distance and then stops. During the sliding process of the centering ring 500, the horizontal position of the slump cone 200 is adjusted so that the outer wall of the centering ring 500 is close to the inner wall of the circular ring 110, so that the slump cone 200 and the J ring 100 can be placed concentrically.
[0050] (4) Reinstall the limit frame 610, and re-fix the limit frame 610 according to the initial position and lifting height of the slump cone 200 in combination with the indication of the scale line 320, so that the free moving height of the guide rod 410 is 250 mm;
[0051] (5) Fill the slump cone 200 with the concrete mixture all at once, scrape off the remaining concrete mixture on the top of the slump cone 200 with a scraper, smooth the concrete mixture along the mouth of the slump cone 200, and remove the concrete on the bottom plate of the cone edge;
[0052] (6) The slump cone 200 is lifted vertically and steadily by 250 mm. During the lifting of the slump cone 200, the guide rod 410 moves along the guide channel 310 on the guide rod 300, so that the slump cone 200 can be easily controlled to be lifted vertically. Moreover, when the slump cone 200 is lifted to a set height, the guide rod 410 cannot move upward due to the blocking of the position frame 610, so that the lifting height of the slump cone 200 can be easily controlled. The lifting time of the slump cone 200 should be controlled within 3s-7s. The lifting of the slump cone 200 should be completed within 150s from the start of feeding.
[0053] (7) When the concrete mixture stops diffusing or the diffusion duration reaches 50 seconds, measure the maximum diameter of the expanded surface and the diameter perpendicular to the maximum diameter; the measurement should be accurate to 1 mm and the result should be rounded to 5 mm.
[0054] The J-ring 100 expansion degree should be the average value of the two diameters of the expansion surfaces perpendicular to each other after the slump expansion of the concrete mixture is terminated. When the difference between the two diameters is greater than 50mm, the test should be repeated.
[0055] The difference between the concrete expansion and the J-ring 100 expansion should be used as the concrete gap passability performance index result.
[0056] When aggregate is blocked at J ring 100 round steel 120, a record should be given.
[0057] After the test is completed, the limit frame 610, the calibration ring 400, the centering ring 500, the slump cone 200 and the like can be removed.
[0058] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0060] The above specific implementation manner cannot be used as a limitation on the protection scope of the utility model. For technicians in this technical field, any replacement, improvement or transformation made to the implementation manner of the utility model falls within the protection scope of the utility model.
[0061] The matters not described in detail in the present invention are all known technologies to those skilled in the art.
Claims
1. A concrete mixture gap passability test device, characterized in that: include: A J ring, wherein the J ring is composed of a circular ring and a plurality of round steels uniformly fixed at the bottom of the circular ring along the circumferential direction; Slump cone; Two guide rods, the two guide rods are relatively fixed on the top of the ring, and the two guide rods are provided with guide channels extending downward from the top surface; A calibration ring, wherein the inner wall of the calibration ring is a conical surface and has the same taper as the outer wall of the slump cone, and two guide rods are arranged opposite to each other on the outer side wall of the calibration ring, and the two guide rods pass through the guide channels on the two guide rods respectively; A centering ring, wherein the inner wall of the centering ring is a conical surface and has the same taper as the outer wall of the slump cone, the inner hole diameter of the centering ring is larger than the inner hole diameter of the calibration ring, and the outer diameter of the centering ring is not larger than the inner diameter of the circular ring.
2. The concrete mixture gap passability test device according to claim 1, characterized in that: The calibration ring and the centering ring are both formed by two semicircular rings mating together, and the mating surfaces of the two semicircular rings are attracted to each other through a pair of magnets.
3. The concrete mixture gap passability test device according to claim 1, characterized in that: Also includes: A limit frame, wherein the limit frame is sleeved on the outside of the guide pole; A locking bolt passes through the rear end of the limiting frame and is tightened on the guide pole.
4. The concrete mixture gap passability test device according to claim 1, characterized in that: The guide pole is provided with vertically arranged scales.
5. The concrete mixture gap passability test device according to claim 1, characterized in that: The centering ring is composed of an inner ring, a middle ring and an outer ring which are connected in sequence, and the thickness of the inner ring and the outer ring is greater than that of the middle ring.
6. The concrete mixture gap passability test device according to claim 1, characterized in that: The outer wall of the slump cone is provided with two handles opposite to each other, and the centering ring is sleeved on the outer side of the slump cone below the handles.
7. The concrete mixture gap passability test device according to claim 1, characterized in that: The horizontal line connecting the two handles is perpendicular to the horizontal line connecting the two guide poles.