CN210626148U - Sample pressing mechanism and device for testing bonding performance of asphalt-aggregate interface - Google Patents
Sample pressing mechanism and device for testing bonding performance of asphalt-aggregate interface Download PDFInfo
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- CN210626148U CN210626148U CN201920710220.1U CN201920710220U CN210626148U CN 210626148 U CN210626148 U CN 210626148U CN 201920710220 U CN201920710220 U CN 201920710220U CN 210626148 U CN210626148 U CN 210626148U
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Abstract
The utility model relates to a sample pressing mechanism and be used for testing pitch-interface adhesive property that gathers materials device, this sample pressing mechanism include pressure disk assembly and adjusting part, pressure disk assembly include first pressure disk and towards the second pressure disk of first pressure disk, adjusting part connect in on first pressure disk and the second pressure disk, and can adjust the suppression distance between first pressure disk and the second pressure disk. The utility model discloses a through the suppression interval of the first pressure disk of adjusting part adjustment and second pressure disk to the sample that will await measuring is placed the suppression station department that forms between first pressure disk and second pressure disk, and then the extrusion awaits measuring the sample in order to obtain the test piece that awaits measuring that is in different bonding states, can reduce the influence of human factor on the basis that reduces manual operation, thereby the device to the test result that awaits measuring that obtains through the suppression of this sample pressing mechanism carry out the test have better accuracy and credibility.
Description
Technical Field
The utility model relates to a building material capability test technical field especially relates to a sample pressing mechanism and be used for testing pitch-the interface adhesion performance that gathers materials device.
Background
At present, most of samples to be tested in a test for evaluating the adhesive property of a building material are prepared manually, and a large error exists. Therefore, when a user tests a sample to be tested which is formed by manual pressing by using the existing testing device, the testing result of the testing device is easily influenced by human factors, and the obtained testing result is lack of accuracy and has no reliability.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an improved sample pressing mechanism and a device for testing the bonding performance of the asphalt-aggregate interface, aiming at the problem that the test result of the existing testing device lacks accuracy, wherein the sample pressing mechanism can simulate and prepare samples to be tested in different bonding states, can reduce the influence of human factors to improve the accuracy of the test result, and has a better application prospect.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a sample pressing means, includes pressure disk subassembly and adjusting part, and above-mentioned pressure disk subassembly includes first pressure disk and faces the second pressure disk of above-mentioned first pressure disk, and above-mentioned adjusting part connects on above-mentioned first pressure disk and second pressure disk to can adjust the suppression distance between above-mentioned first pressure disk and the second pressure disk.
In one embodiment, the first platen is formed with a first pressing member disposed toward the second platen and formed with a first pressing portion having an arc-shaped surface; and/or the presence of a catalyst in the reaction mixture,
the second platen is formed with a second pressing member that is disposed toward the first platen and is formed with a second pressing portion having an arc-shaped surface.
In one embodiment, the sample pressing mechanism is provided with a first connection post connected to a side of the first platen facing away from the second platen.
In one embodiment, at least one placing hole is formed in one side of the first pressing plate facing the second pressing plate.
In one embodiment, the first platen has at least one fixing hole, and the fixing hole is communicated with the placing hole.
In one embodiment, the adjusting assembly comprises an adjusting rod and an adjusting nut, and the bottom of the adjusting rod penetrates through the first pressure plate and is abutted against the second pressure plate; the adjusting nut is screwed on the adjusting rod and is abutted against the first pressure plate.
In one embodiment, the sample testing mechanism is provided with a second connecting post connected to a side of the second platen facing away from the first platen.
An apparatus for testing the bonding performance of a bitumen-aggregate interface comprising a sample pressing mechanism as in any one of the embodiments above.
In one embodiment, the device for testing the bonding performance of the asphalt-aggregate interface comprises a movable shaft, a fixed platform and a testing shell, wherein the movable shaft is connected to a first pressure plate; the fixed platform is connected with the second pressure plate; the movable shaft, the fixed platform and the sample pressing mechanism are all arranged in the test shell.
In one embodiment, the apparatus for testing the bonding performance of the asphalt-aggregate interface comprises a sensing element disposed on the first platen; and/or the presence of a catalyst in the reaction mixture,
the device for testing the bonding performance of the asphalt-aggregate interface comprises a temperature control module, wherein the temperature control module is arranged on the testing shell.
According to the sample pressing mechanism and the device for testing the bonding performance of the asphalt-aggregate interface, the pressing distance between the first pressure plate and the second pressure plate is adjusted through the adjusting assembly, the sample to be tested is placed at the pressing station formed between the first pressure plate and the second pressure plate, the sample to be tested is further extruded to obtain the pieces to be tested in different bonding states, the influence of human factors can be reduced on the basis of reducing manual operation, and therefore the device has good accuracy and reliability on the test result of the test of the pieces to be tested, wherein the test result is obtained by pressing the sample pressing mechanism.
Drawings
Fig. 1 is a schematic structural diagram of a sample pressing mechanism according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of the sample pressing mechanism shown in fig. 1 from another perspective.
Fig. 3 is a schematic structural view of a test apparatus equipped with the sample hold-down mechanism shown in fig. 1.
100. A sample pressing mechanism; 10. a platen assembly; 11. a first platen; 111. a first extrusion; 1111. a first pressing portion; 12. a second platen; 121. a second extrusion; 1211. a second pressing portion; 13. placing holes; 14. a fixing hole; 20. an adjustment assembly; 21. adjusting a rod; 22. adjusting the nut; 30. a first connecting column; 40. a second connecting column; 200. a testing device; 201. a movable shaft; 202. a fixed platform; 203. a sensing element; 204. a temperature control module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a sample pressing mechanism 100 according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of another view angle of the sample pressing mechanism 100 shown in fig. 1. In order to solve the problems that the test result of the existing test device for the material interface bonding performance lacks accuracy and is low in reliability, the embodiment provides the sample pressing mechanism 100 capable of pressing and molding the sample to be tested, the sample pressing mechanism 100 can press the sample to be tested to obtain pieces to be tested (not shown) in different bonding states, test errors caused by a manual pressing process are avoided, the accuracy of the test result of the test device is effectively improved, and the test device has a good application prospect.
In order to explain the sample pressing mechanism 100 provided in the present embodiment in detail, the sample to be tested in the present embodiment is selected from asphalt or an asphalt mixture. However, the sample to be tested in the present embodiment is not limited to asphalt or asphalt mixture, and those skilled in the art can also use the sample pressing mechanism 100 to perform press forming on other types of samples to be tested to obtain corresponding samples to be tested.
The sample pressing mechanism 100 provided in this embodiment includes a platen assembly 10 and an adjusting assembly 20, the platen assembly 10 includes a first platen 11 and a second platen 12 facing the first platen 11, and a pressing station for placing a sample to be tested is formed between the first platen 11 and the second platen 12; the adjusting assembly 20 is connected to the first pressure plate 11 and the second pressure plate 12, and can adjust a pressing distance between the first pressure plate 11 and the second pressure plate 12. It will be appreciated that the number of adjustment assemblies 20 in the sample pressing mechanism 100 is two, as shown in fig. 1. However, the number of the adjusting assemblies 20 is not limited to the number shown in fig. 1, and those skilled in the art can set other numbers of adjusting assemblies 20 according to actual requirements.
In the process of using the test sample pressing mechanism 100 to press and form a test sample (such as asphalt mixture), a tester may place the test sample between the first platen 11 and the second platen 12, and adjust the pressing distance between the first platen 11 and the second platen 12 through the adjusting component 20, so that the first platen 11 moves toward the second platen 12 and presses the test sample placed on the second platen 12 to obtain a corresponding test sample.
The adjusting assembly 20 in this embodiment is disposed on the first pressure plate 11, and the bottom of the adjusting assembly 20 passes through the first pressure plate 11 and abuts against the second pressure plate 12, so that the adjusting assembly 20 can move up and down along with the up and down movement of the first pressure plate 11.
It is understood that the adjusting assembly 20 in the present embodiment may be disposed on the second pressure plate 12, besides the first pressure plate 11, that is, the adjusting assembly 20 is disposed on the second pressure plate 12, and one end of the adjusting assembly 20 passes through the second pressure plate 12 and abuts against the first pressure plate 11.
Wherein, the adjusting component 20 is provided with scale marks (not shown), such as: the adjusting assembly 20 is provided with 10 scale marks, and the adjusting assembly 130 will rise or fall 0.2mm after the tester rotates one scale, so that the worker can adjust the distance between the first pressure plate 11 and the second pressure plate 12 by rotating the adjusting assembly 20.
The working process of the sample pressing mechanism 100 can be detailed as follows: a tester places the first platen 11 and the second platen 12 in an oven for preheating, and installs the preheated first platen 11 and the preheated second platen 12 on a device for testing the bonding performance of the asphalt-aggregate interface, which is hereinafter referred to as a testing device 200 for convenience of description; a tester adjusts the distance between the first pressing plate 11 and the second pressing plate 12 to a required pressing distance by adjusting the adjusting assembly 30, and fixes the adjusting assembly 30 on the first pressing plate 11; then, the tester places the sample to be tested on the second platen 12, and further adjusts the first platen 11 to make the bottom of the adjusting assembly 30 abut against the second platen 12, so that the first platen 11 makes the test piece to be tested in a corresponding bonding state by pressing the sample to be tested placed on the second platen 12.
It should be noted that, because the sample to be tested (such as asphalt or asphalt mixture) is in a flowing state, the sample to be tested in the flowing state needs to be injected into the silica gel mold so as to press-mold the sample to be tested; in addition, the to-be-tested part press-molded by the sample pressing mechanism 100 needs to be peeled off from the silicone mold on the outer surface, so that the to-be-tested part can be suitable for uniaxial tensile test.
Wherein, experimental pressing mechanism 100 is provided with first terminal 30, and first terminal 30 is connected in the one side of first pressure disk 11 dorsad second pressure disk 12, and first pressure disk 11 is connected with testing arrangement 200 through this first terminal 30, promptly: the testing device 200 can adjust the first platen 11 by moving the first connecting column 30, and the first platen 11 presses the sample to be tested placed on the second platen 12, so that the sample to be tested is not required to be manually pressed, and the influence of human factors is reduced. In addition, a second terminal 40 is connected to a side of the second platen 12 facing away from the first platen 11, and the second platen 12 is mounted on the testing apparatus 200 through the second terminal 40 so as to prevent the second platen 12 from moving during pressing of a sample to be tested.
Wherein, the first platen 11 is formed with a first extrusion 111 arranged towards the second platen 12, the second platen 12 is formed with a second extrusion 121 arranged towards the first platen 11, the first extrusion 111 is matched with the second extrusion 121, and the first extrusion 111 can extrude the sample to be tested placed on the second extrusion 121 in the descending process of the first platen 11 so as to prepare the sample to be tested in a corresponding bonding state.
It will be appreciated that the first extrusion 111 and the second extrusion 121 are equivalent to two coarse aggregates of equal size and are used to simulate the interfacial zone formed between two coarse aggregates in the bituminous mixture; in addition, the first extrusion piece 111 and the second extrusion piece 121 are both made of metallic materials, such as steel projections, so that test errors caused by unbalance of aggregate surface roughness can be effectively avoided, and the accuracy of the test result of the test device 200 can be effectively improved.
The first pressing member 111 is provided with a first pressing portion 1111, the second pressing member 121 is provided with a second pressing portion 1211 matched with the first pressing portion 1111, and a pressing station for placing a sample to be tested is formed between the first pressing portion 1111 and the second pressing portion 1211. In the process of moving the first platen 11 toward the second platen 12, the first pressing portion 1111 on the first pressing member 111 will press the sample to be tested placed at the position of the second pressing portion 1211 to press-form the sample to be tested. The first extrusion portion 1111 and the second extrusion portion 1211 are used for simulating two coarse aggregates with the same particle size in the asphalt mixture. In addition, the first pressing portion 1111 and the second pressing portion 1211 each have an arc surface, such as: a hemispherical surface.
The adjusting assembly 20 includes an adjusting rod 21 and an adjusting nut 22, wherein the bottom of the adjusting rod 21 passes through a threaded hole (not shown) formed on the first pressure plate 11 and is in abutting fit with the second pressure plate 12; the adjusting nut 22 is screwed on the adjusting rod 21 and abuts against the first pressure plate 11, and the adjusting nut 22 is located between the first pressure plate 11 and the second pressure plate 12, so that the pressing distance between the first pressure plate 11 and the second pressure plate 12 can be limited while the first pressure plate 11 is supported.
In order to prevent the adjustment lever 21 from being separated from the first pressure plate 11, an annular protrusion (not shown) is formed on the top of the adjustment lever 21, and the annular protrusion is larger than the diameter of the threaded hole of the first pressure plate 11 so that the annular protrusion cannot pass through the threaded hole, and the movable range of the first pressure plate 11 is limited between the annular protrusion and the adjustment nut 22. Wherein, the annular convex part is marked with scale marks, such as: 10 scale marks are marked on the annular convex part, and after the tester rotates one scale, the adjusting rod 21 rises or falls by 0.2mm, so that the worker can adjust the pressing distance between the first pressing plate 11 and the second pressing plate 12 by rotating the annular convex part on the adjusting component 20.
A plurality of placing holes 13 are further formed in one side of the first pressing plate 11 facing the second pressing plate 12, a plurality of fixing holes 14 are formed in the side wall of the first pressing plate 11, and the placing holes 13 are communicated with the fixing holes 14; the placing hole 13 can be used for placing functional devices, such as sensors, etc., and the fixing hole 14 has the functions of: when the functional device is placed in the placement hole 13, a tester may insert a fixing member (not shown) into the fixing hole 14 and make the fixing member abut against the functional device placed in the placement hole 13, so as to prevent the functional device placed in the placement hole 13 from loosening.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a testing apparatus 200 equipped with the sample pressing mechanism 100 shown in fig. 1. The embodiment of the utility model provides a still provide a testing arrangement 200, this testing arrangement 200 internal device has the sample pressing mechanism 100 that provides in the above-mentioned embodiment, and this testing arrangement 200 can be with the sample press forming that awaits measuring in order to obtain the piece of awaiting measuring that is in different bonding state to can carry out the adhesion property test to the piece of awaiting measuring that obtains.
The testing device 200 comprises a movable shaft 201, a fixed platform 202 and a testing housing 203, wherein the sample pressing mechanism 100 is installed inside the testing housing 203 to isolate the sample pressing mechanism 100 from the external environment, so that the external environment is prevented from being influenced. The movable shaft 201 is connected to the first terminal 30 on the sample pressing mechanism 100, so that the first terminal 30 can move along with the movement of the movable shaft 201, such as: when the movable shaft 201 is in a lifting state, the first binding post 30 will also drive the first platen 11 to correspondingly lift; when the movable shaft 201 is in a rotating state, the first terminal 30 drives the first pressure plate 11 to rotate correspondingly. Fixed platform 202 is fixedly connected to second connecting post 40 of sample pressing mechanism 100, and second platen 12 is mounted on fixed platform 202.
The testing device 200 further includes a sensing element 204, the sensing element 204 is mounted on the placement hole 13 formed on the first platen 11, and the sensing element 204 is tightly abutted by the fixing element mounted in the fixing hole 14, so as to prevent the sensing element 204 placed on the placement hole 13 from loosening. The sensing piece 204 is used for monitoring the deformation of the test piece to be tested in real time in the process of performing the uniaxial tensile test on the test piece to be tested, and transmitting the monitored deformation to an external acquisition system in the form of an electric signal.
Wherein, still be provided with accuse temperature module 205 on testing arrangement 200, experimenter accessible operation accuse temperature module 205 regulates and control the inside temperature of environment box.
The testing process of the testing apparatus 200 having the testing structure 100 provided in the above embodiment can be detailed as follows:
firstly, placing a first pressing plate 11, a second pressing plate 12 and an adjusting assembly 20 in an oven for preheating by a tester;
secondly, mounting the preheated first platen 11 and the preheated second platen 12 on the movable shaft 201 and the fixed platform 202 respectively by a tester; meanwhile, the tester manipulates the adjusting lever 21 to adjust the distance between the first pressing portion 1111 and the second pressing portion 1211, and rotates the adjusting nut 22 to fix the adjusting lever 21 on the first platen 11;
step three, the tester sleeves the silica gel mold on the second extrusion part 1211, and injects the sample to be tested in a flowing state into the silica gel mold, that is: injecting road asphalt heated to 130-150 ℃ into the silica gel mold by a tester;
step four, a tester controls the movable shaft 201 to enable the first extrusion part 1111 on the first extrusion part 111 to descend into the silica gel mold until the bottom of the adjusting rod 21 abuts against the surface of the second pressing plate 12;
step five, the tester installs the sensing piece 204 on the placing hole 13, and installs the fixing piece in the fixing hole 14 to abut against the sensing piece 204; in addition, the sensing element 204 is connected to an external acquisition system (not shown), and the sensing element 204 has been adjusted to an initial zero position by the experimenter;
step six, the experimenter operates the temperature control module 205 to reduce the internal temperature of the testing shell 203 to the temperature required by the test at the speed of 5 ℃/h, and strips off the silica gel mold after a preset time (such as 2h) to obtain the piece to be tested which is formed by pressing.
In addition, after the test piece to be tested is prepared, the tester can perform a constant variable uniaxial tensile test on the test piece to be tested placed in the testing device 200 through an external control system (such as a dynamic hydraulic personal wear multifunctional material testing machine), and record the change curve of load and displacement in the loading process, and calculate the bonding strength of the test piece to be tested according to a formula for calculating the bonding strength of the asphalt-aggregate interface, wherein the specific formula is as follows:
A＝2πR2
wherein, the sigma refers to the bonding strength of an asphalt-aggregate interface, and the unit is Mpa; fmaxThe unit is N, which is the maximum load borne by a uniaxial tensile test; a is the bonding area of the asphalt-aggregate interface, and the unit is mm2(ii) a R refers to the radius of the hemispherical first top cap (or second top cap) in mm.
The test structure 100 and the test device 200 having the test sample pressing mechanism 100 provided in this embodiment are configured to press a test sample placed on the second platen 12 through the first platen 11 mounted on the test device 200, and adjust the pressing distance between the first platen 11 and the second platen 12 through the adjusting component 20, so as to press and obtain test samples in different bonding states, and the influence of human factors can be reduced on the basis of reducing manual operations, so that the test result obtained by testing the test sample pressed by the test sample pressing mechanism 100 by the test device 200 has better accuracy and reliability.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The utility model provides a sample pressing mechanism, characterized in that, includes pressure disk subassembly (10) and adjusting part (20), pressure disk subassembly (10) include first pressure disk (11) and face second pressure disk (12) of first pressure disk (11), adjusting part (20) connect in on first pressure disk (11) and the second pressure disk (12), and can adjust the suppression distance between first pressure disk (11) and the second pressure disk (12).
2. The specimen pressing mechanism according to claim 1, characterized in that the first platen (11) is formed with a first pressing member (111), the first pressing member (111) being disposed toward the second platen (12) and being formed with a first pressing portion (1111), the first pressing portion (1111) having an arc-shaped surface; and/or the presence of a catalyst in the reaction mixture,
the second platen (12) is formed with a second pressing member (121), the second pressing member (121) being disposed toward the first platen (11) and formed with a second pressing portion (1211), the second pressing portion (1211) having an arc-shaped surface.
3. Specimen pressing mechanism according to claim 1, characterized in that the specimen pressing mechanism (100) is provided with a first connecting post (30), the first connecting post (30) being connected to a side of the first platen (11) facing away from the second platen (12).
4. The sample pressing mechanism according to claim 1, wherein at least one placing hole (13) is opened in a side of the first platen (11) facing the second platen (12).
5. The sample pressing mechanism according to claim 4, wherein the side wall of the first platen (11) is provided with at least one fixing hole (14), and the fixing hole (14) communicates with the placement hole (13).
6. The specimen pressing mechanism of claim 1, wherein the adjustment assembly (20) comprises an adjustment rod (21) and an adjustment nut (22), the bottom of the adjustment rod (21) passing through the first platen (11) and abutting the second platen (12); the adjusting nut (22) is screwed on the adjusting rod (21) and is abutted against the first pressure plate (11).
7. Sample pressing mechanism according to claim 1, wherein the sample pressing mechanism (100) is provided with a second connecting column (40), the second connecting column (40) being connected to a side of the second platen (12) facing away from the first platen (11).
8. An apparatus for testing the bonding properties of an asphalt-aggregate interface, characterized in that the apparatus (200) for testing the bonding properties of an asphalt-aggregate interface is provided with a specimen pressing mechanism (100) according to any one of claims 1 to 7.
9. The apparatus for testing the adhesion property of an asphalt-aggregate interface according to claim 8, wherein the apparatus (200) for testing the adhesion property of an asphalt-aggregate 5-material interface comprises a movable shaft (201), a fixed platform (202) and a testing shell (203), wherein the movable shaft (201) is connected to the first platen (11); the fixed platform is connected to a second pressure plate (12); the movable shaft (201), the fixed platform (202) and the sample pressing mechanism (100) are all arranged in the test shell (203).
10. The apparatus for testing the adhesion properties of a bitumen-aggregate interface according to claim 9, wherein said apparatus (200) for testing the adhesion properties of a bitumen-aggregate interface comprises a sensing element (204), said sensing element (204) being arranged on said first platen; and/or the presence of a catalyst in the reaction mixture,
the device (200) for testing the bonding performance of the asphalt-aggregate interface comprises a temperature control module (205), wherein the temperature control module (205) is arranged on the testing shell (203).
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| CN2019206611454 | 2019-05-09 | ||
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| CN210626148U true CN210626148U (en) | 2020-05-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034562A (en) * | 2021-12-08 | 2022-02-11 | 长沙理工大学 | Aggregate and asphalt tensile failure assessment method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034562A (en) * | 2021-12-08 | 2022-02-11 | 长沙理工大学 | Aggregate and asphalt tensile failure assessment method |
| CN114034562B (en) * | 2021-12-08 | 2024-04-19 | 长沙理工大学 | Aggregate and asphalt tensile failure evaluation method |
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Assignee: Jinhua Shengtai Commercial Concrete Co.,Ltd. Assignor: ZHEJIANG NORMAL University Contract record no.: X2022980008011 Denomination of utility model: Sample pressing mechanism and device for testing the adhesion property of asphalt aggregate interface Granted publication date: 20200526 License type: Common License Record date: 20220623 |