Asphalt segregation performance testing device

Abstract

The utility model discloses an asphalt segregation performance testing device. The asphalt segregation performance testing device comprises an accommodating pipe, a first plug, a second plug and the like, the containing pipe is formed by sequentially connecting a plurality of hollow pipes in series. The first plug and the second plug are arranged at the two ends of the containing pipe respectively. According to the utility model, the design of the split type accommodating pipe is adopted, so that the segmentation uniformity of an asphalt sample in the segregation test process is improved, and the accuracy of a test result is improved; meanwhile, the device can be repeatedly used, so that the consumption of test materials is greatly reduced, and the test cost is saved. Furthermore, a connecting pipe with a screen is adopted as a connecting piece of the hollow pipe, so that the device can be suitable for asphalt without fibers and asphalt containing fibers, and is wide in application range and high in practicability. In addition, the device also has the advantages of simple structure, low preparation cost, easiness in operation, difficulty in loss, universal parts, independent replacement and the like.

Description

Technical Field

[0001] This utility model relates to asphalt performance testing, specifically to an asphalt segregation performance testing device, and belongs to the field of asphalt performance testing technology. Background Technology

[0002] Modified asphalt is widely used in high-grade highways due to its excellent performance. Because it can simultaneously improve multiple road performance characteristics of asphalt mixtures, it is gradually gaining international recognition. However, during pavement use, under the influence of factors such as light, water, and heat, the modifier in the modified asphalt can separate from the base asphalt, severely affecting the performance of the modified asphalt. Currently, the most commonly used test method for the segregation performance of polymer-modified asphalt is T0661-2011, the polymer-modified asphalt segregation test. In this test, the tester needs to manually cut the aluminum tube containing the asphalt into three equal parts, which is difficult to operate, prone to errors, and thus affects the accuracy of the test results. Furthermore, the aluminum tube is difficult to demold from the asphalt, and residues are easily left behind, often making reuse impossible and leading to material waste.

[0003] Furthermore, since fiber-reinforced composites are an effective technical approach to improve pavement performance, significantly enhancing asphalt pavement's resistance to rutting at high temperatures, cracking at low temperatures, fatigue, freeze-thaw cycles, and water damage, they play a crucial role in substantially improving pavement load-bearing capacity and service life. Therefore, fibers are frequently added to modified asphalt to improve its road performance. However, fiber-modified asphalt cannot be directly measured using the aforementioned segregation test method. Fibers possess a certain surface inertness, and after prolonged high-temperature segregation, they accumulate at the bottom of the segregation tube, making subsequent softening point tests impossible. Utility Model Content

[0004] To address the problems of large errors and difficulty in reusability caused by the need for manual cutting of aluminum tubes in existing asphalt segregation tests, this invention provides an asphalt segregation performance testing device. This device uses multiple assembled hollow tubes connected in series to form a container tube for holding asphalt. Compared to existing aluminum tubes, this container tube has a fixed design specification, which can significantly reduce or even avoid test errors caused by manual cutting during use. Moreover, the number of hollow tubes that make up the container tube can be flexibly adjusted. Compared to previous polymer-modified asphalt tests that simply cut aluminum tubes into three fixed parts, the container tube of this device is more flexible and has stronger practicality and applicability.

[0005] Furthermore, addressing the shortcoming of existing fiber-modified asphalt systems that cannot undergo softening point testing after passing the polymer-modified asphalt segregation test (T0661-2011) using aluminum tubes as containers, this invention employs a connecting pipe with a screen as a series component between any two hollow tubes. This effectively prevents the cross-flow of fiber polymers between different hollow tubes, thus enabling fiber-modified asphalt to continue undergoing softening point testing after passing the polymer-modified asphalt segregation test (T0661-2011).

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0007] An apparatus for testing the segregation performance of asphalt includes a receiving tube, a first plug, and a second plug. The receiving tube comprises or is composed of multiple hollow tubes connected in series. The first plug is located at one end of the receiving tube, and the second plug is located at the other end of the receiving tube.

[0008] Preferably, the receiving tube is composed of multiple hollow tubes connected in series via connecting tubes. A screen is provided in the connecting tube.

[0009] Preferably, the receiving tube is composed of ~ hollow tubes connected in series via connecting tubes.

[0010] Preferably, the aperture of the sieve is 0.1~3mm, and more preferably 0.15~1.5mm. For example, it is any one of 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, and 3mm.

[0011] Preferably, both the first plug and the second plug are screw plugs. The connecting pipe is a threaded connector.

[0012] Preferably, the device also includes a support frame. The support frame includes feet, supports, and a crossbeam. Each end of the crossbeam is connected to a foot via a vertically positioned support. Multiple slots are evenly spaced along the crossbeam's axial direction. The receiving tube is vertically mounted on the support frame through these slots.

[0013] Preferably, the number of the multiple checkpoints is 2 to 10, and more preferably 3 to 8.

[0014] Preferably, a horizontal bubble meter is also provided on the crossbeam. Preferably, the horizontal bubble meter is embedded in the surface of the middle part of the crossbeam.

[0015] Preferably, an annular groove extending circumferentially is formed on the wall of each hollow tube, and the inner diameter of the annular groove matches the diameter of the bayonet. The receiving tube is vertically mounted on the support through the annular groove and the bayonet.

[0016] Preferably, each hollow tube has a liquid outlet on its wall. Preferably, the liquid outlet has threads, and a bolt is installed through these threads.

[0017] Preferably, a drain piston is also provided through the first plug. The piston end of the drain piston extends into the receiving tube, and the other end of the drain piston protrudes outside the first plug. Preferably, the drain piston and the first plug are connected by a thread.

[0018] In this invention, the container tube for holding asphalt comprises or is composed of multiple hollow tubes of the same size and specifications connected in series. The series connection can be direct threaded connection (i.e., one end of any hollow tube has an external thread on its outer wall, and the other end has an internal thread), or it can be connected via a connecting tube. In other words, using this detachable container tube in the polymer-modified asphalt segregation test (T0661-2011) allows for precise segmentation of the internal asphalt material, significantly reducing errors caused by manual segmentation and improving the accuracy of the test results. Furthermore, because the container tube itself is a detachable design, there is no need to cut the tube body, thus avoiding damage and allowing for reuse. This significantly reduces the consumption of test materials and saves on test costs. It should also be noted that since the container tube can be separated without cutting, the tube body does not need to be made of soft aluminum; other rigid materials that are hard and easy to demold from the asphalt can be used.

[0019] In this invention, a connecting pipe is used for connecting two adjacent hollow pipes. The connecting pipe is preferably a bidirectional threaded joint. That is, either end of the threaded joint is threaded to the hollow pipe, thus achieving a detachable connection between the two hollow pipes. Simultaneously, a sieve is installed inside the connecting pipe, dividing it into two cavities connected through sieve holes. Each cavity is connected to one of the two adjacent hollow pipes. By using a sieve (the sieve hole diameter is adjustable; a suitable sieve diameter can be selected according to the size of different fibers), when the asphalt to be tested contains fibers, the crossflow of fibers within the hollow pipes can be effectively prevented, thus avoiding interference with subsequent softening point tests. For asphalt without fibers, the sieve has virtually no effect. However, it is preferable that when the asphalt being tested does not contain fibers, a sieve may not be used inside the connecting pipe, or a sieve with a larger hole size may be preferred.

[0020] In this invention, the number of hollow tubes constituting the receiving tube can be multiple, generally two or more, and can be designed according to actual needs. The lumens of the receiving tube are connected in series. When the receiving tube is placed vertically, the first plug is installed in the top cavity of the receiving tube, and the second plug is installed in the bottom cavity of the receiving tube, thereby achieving sealing at both ends of the receiving tube. Preferably, both the first and second plugs are screw plug structures, that is, the first and second plugs are detachably threaded connected to the receiving tube.

[0021] In this invention, during the segregation test of polymer-modified asphalt, the receiving tube needs to be placed vertically for a period of time. Therefore, this invention also provides a support for the vertical placement of the receiving tube. The support consists of a horizontally arranged beam, two pillars, and two footrests respectively located at the bottom of the two pillars. The beam has a certain width (generally larger than the diameter of the receiving tube) and is evenly provided with multiple slots (circular through holes or semi-circular notches) along its axial direction for engaging the receiving tube. Preferably, to improve the stability of the receiving tube in the slots, annular grooves extending circumferentially are provided on the wall of the hollow tube (preferably located on the axial middle section of the hollow tube wall). The axial width of the annular groove matches the thickness of the beam, and the inner diameter of the annular groove (i.e., the diameter of the circle formed by the bottom of the groove circumferentially) matches the diameter of the slot. Therefore, when the receiving tube needs to be installed on the support, only the annular groove on any one of the hollow tubes needs to engage with the slot. Generally, the crossbeam is positioned at a height such that after the latch engages with the annular groove in the hollow tube of the receiving tube, the bottom of the receiving tube contacts the platform where the legs are located. Preferably, a level bubble level is also installed on the crossbeam to ensure that the crossbeam remains level when the support is placed.

[0022] In this invention, a sampling port is provided on the wall of each hollow tube. Through this port, after heating in the polymer-modified asphalt segregation test, asphalt samples can be taken from the inside of any hollow tube without disassembling the container tube. Each sampling port corresponds to the asphalt liquid in each section of the tube. Preferably, the sampling port is threaded, and a bolt is installed through the thread. When sampling is not required, the bolt remains plugged in the sampling port.

[0023] In this invention, a drain piston is also provided through the first plug. One end of the drain piston remains axially outside the first plug, while the other end is fitted with a piston (e.g., a rubber stopper) and located at the top cavity of the receiving tube. By pushing the drain piston axially, the asphalt inside the receiving tube is squeezed out. Preferably, the drain piston and the first plug are threadedly connected, meaning that rotating the drain piston causes its piston end to move axially within the cavity of the receiving tube.

[0024] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0025] 1. The asphalt segregation performance testing device of this utility model adopts a split-type container tube design, which improves the uniformity of asphalt sample segmentation during the segregation test and improves the accuracy of the test results. At the same time, the device can be reused, which greatly reduces the consumption of test materials and saves test costs.

[0026] 2: The asphalt segregation performance test device of this utility model uses a connecting pipe with a screen as the connecting part of the hollow tube, which can be applied to asphalt without fibers as well as asphalt with fibers, with a wide range of applications and strong practicality.

[0027] 3. The asphalt segregation performance testing device of this utility model has a simple overall structure, low preparation cost, is easy to operate, is not easily damaged, and its parts are universal and can be replaced individually, which is conducive to promotion and application. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the accommodating tube described in this utility model.

[0029] Figure 2 This is a cross-sectional structural diagram of the connecting pipe described in this utility model.

[0030] Figure 3 This is a schematic diagram of the structure of the accommodating tube of this utility model when it has a drain port and a drain piston.

[0031] Figure 4 This is a schematic diagram of the structure of the bracket described in this utility model.

[0032] Figure 5 This is a top view of the bracket described in this utility model.

[0033] Figure 6 This is a schematic diagram of the combination of the receiving tube and the bracket of this utility model.

[0034] Figure 7 The diagram shows the results of the segregation test in an application embodiment of this application.

[0035] Reference numerals in the attached diagram: 1: receiving tube; 101: hollow tube; 102: annular groove; 103: liquid outlet; 2: first plug; 3: second plug; 4: connecting tube; 401: sieve; 5: support; 501: foot; 502: support column; 503: crossbeam; 504: bayonet; 505: horizontal bubble meter; 6: drain piston. Detailed Implementation

[0036] The technical solution of this utility model is illustrated below. The scope of protection of this utility model includes, but is not limited to, the following embodiments.

[0037] An apparatus for testing the segregation performance of asphalt includes a receiving tube 1, a first plug 2, and a second plug 3. The receiving tube 1 comprises or is composed of multiple hollow tubes 101 connected in series. The first plug 2 is located at one end of the receiving tube 1, and the second plug 3 is located at the other end of the receiving tube 1.

[0038] Preferably, the receiving tube 1 is composed of multiple hollow tubes 101 connected in series via a connecting tube 4. A screen 401 is provided in the connecting tube 4.

[0039] Preferably, the receiving tube 1 is composed of 2 to 8 hollow tubes 101 connected in series via a connecting tube 4, and more preferably, the receiving tube 1 is composed of 3 to 5 hollow tubes 101 connected in series via a connecting tube 4.

[0040] Preferably, the aperture of the sieve 401 is 0.1~3mm, and more preferably 0.15~1.5mm.

[0041] Preferably, both the first plug 2 and the second plug 3 are screw plugs. The connecting pipe 4 is a threaded connector.

[0042] Preferably, the device further includes a support 5. The support 5 includes a foot 501, a support column 502, and a crossbeam 503. Each end of the crossbeam 503 is connected to a foot 501 via a vertically arranged support column 502. Multiple slots 504 are evenly distributed along the axial direction on the crossbeam 503. The receiving tube 1 is vertically mounted on the support 5 through the slots 504.

[0043] Preferably, the number of the plurality of the bayonet 504 is 2 to 10, and more preferably 3 to 8.

[0044] Preferably, a horizontal bubble meter 505 is also provided on the crossbeam 503. Preferably, the horizontal bubble meter 505 is embedded in the surface of the middle part of the crossbeam 503.

[0045] Preferably, an annular groove 102 extending circumferentially is formed on the wall of each hollow tube 101, and the inner diameter of the annular groove 102 is consistent with the diameter of the bayonet 504. The receiving tube 1 is vertically mounted on the support 5 through the annular groove 102 and the bayonet 504.

[0046] Preferably, each hollow tube 101 has a liquid outlet 103 on its wall. Preferably, the liquid outlet 103 has threads and a bolt is installed through the threads.

[0047] Preferably, a drain piston 6 is also provided through the first plug 2. The piston end of the drain piston 6 extends into the receiving tube 1, and the other end of the drain piston 6 protrudes outside the first plug 2. Preferably, the drain piston 6 and the first plug 2 are connected by threads. Example 1

[0048] like Figure 1-6 As shown, an asphalt segregation performance testing device includes a receiving tube 1, a first plug 2, and a second plug 3. The receiving tube 1 includes or is composed of multiple hollow tubes 101 connected in series. The first plug 2 is located at one end of the receiving tube 1, and the second plug 3 is located at the other end of the receiving tube 1. Example 2

[0049] The embodiment 1 is repeated, except that the receiving tube 1 is composed of multiple hollow tubes 101 connected in series via a connecting tube 4. A screen 401 is provided in the connecting tube 4. Example 3

[0050] The embodiment 2 is repeated, except that the receiving tube 1 is composed of 5 hollow tubes 101 connected in series by a connecting tube 4. Example 4

[0051] Example 3 is repeated, except that the receiving tube 1 is composed of three hollow tubes 101 connected in series by a connecting tube 4. Example 5

[0052] Repeat Example 4, except that the sieve aperture of the partition 401 is 1 mm. Example 6

[0053] Repeat Example 5, except that the sieve aperture of the partition sieve 401 is 0.5 mm. Example 7

[0054] Repeat Example 6, except that the sieve aperture of the partition 401 is 0.1 mm. Example 8

[0055] Example 7 is repeated, except that both the first plug 2 and the second plug 3 are screw plugs. The connecting pipe 4 is a threaded connector. Example 9

[0056] The same method is used in embodiment 8, except that the device also includes a support 5. The support 5 includes a foot 501, a support column 502, and a crossbeam 503. Each end of the crossbeam 503 is connected to a foot 501 via a vertically arranged support column 502. Multiple slots 504 are evenly distributed along the axial direction on the crossbeam 503. The receiving tube 1 is vertically mounted on the support 5 through the slots 504. Example 10

[0057] Example 9 is repeated, except that the number of the plurality of said bayonet 504 is 3. Example 11

[0058] Example 10 is repeated, except that the number of the plurality of said bayonet 504 is 6. Example 12

[0059] The same method as Embodiment 11 is used, except that a horizontal bubble meter 505 is also provided on the crossbeam 503. The horizontal bubble meter 505 is embedded in the middle beam surface of the crossbeam 503. Example 13

[0060] The embodiment 12 is repeated, except that an annular groove 102 extending circumferentially is provided on the wall of each hollow tube 101, and the inner diameter of the annular groove 102 is consistent with the diameter of the bayonet 504. The receiving tube 1 is vertically mounted on the support 5 through the annular groove 102 and the bayonet 504. Example 14

[0061] Example 13 is repeated, except that a liquid outlet 103 is also provided on the wall of each hollow tube 101. A thread is provided in the liquid outlet 103, and a bolt is installed through the thread. Example 15

[0062] The embodiment 14 is repeated, except that a drain piston 6 is also provided through the first plug 2. The piston end of the drain piston 6 extends into the receiving tube 1, and the other end of the drain piston 6 protrudes outside the first plug 2. The drain piston 6 and the first plug 2 are connected by threads.

[0063] Application Examples

[0064] Using the apparatus described in Example 15, taking a container tube composed of three hollow tubes 101 connected in series as an example, during the polymer-modified asphalt segregation test (T0661-2011): First, the second plug 3 is inserted into the bottom end of one of the hollow tubes 101, then filled with modified asphalt. Next, another hollow tube 101 is connected in series at the top of this hollow tube 101 via a connecting pipe 4, and then filled with modified asphalt again. Then, a third hollow tube 101 is connected in series at the top via a connecting pipe 4 and filled with modified asphalt again. Finally, the first plug 2 is inserted into the top of the third hollow tube 101. Following the above procedure, six container tubes 1 filled with modified asphalt are obtained, and all six container tubes 1 are vertically mounted on the support 5 via annular grooves 102 and bayonet 504. Then, the support 5 and the container tubes are placed together in an oven and heated to the segregation temperature for 48 hours, then cooled to a solid state and held at that temperature for 4 hours. During heating and cooling, the horizontal bubble level 505 on the support 5 ensures that the container tube 1 is perpendicular to the horizontal plane. During heating, if a portion of the asphalt liquid needs to be temporarily removed for testing, it can be discharged from the drain port 103 (any of the three drain ports can be selected) using the drain piston 6 without disassembling the tube body. Afterwards, the cooled container tube 1 is removed, and the three hollow tubes are released by loosening the connecting pipe 4. The modified asphalt in the three hollow tubes is then placed into three beakers from top to bottom, labeled I, II, and III, respectively, for subsequent testing. The modified asphalt in beakers I, II, and III is then subjected to a softening point test, following the specifications JTG E20-2011T0606 (Asphalt Softening Point Test (Ring and Ball Method)). The asphalt segregation test was conducted using the apparatus of this application, and the test results are as follows: Figure 7 As shown.

Claims

1. A testing device for asphalt segregation performance, characterized in that: The device includes a receiving tube (1), a first plug (2) and a second plug (3); the receiving tube (1) includes or is composed of multiple hollow tubes (101) connected in series; the first plug (2) is located at one end of the receiving tube (1) and the second plug (3) is located at the other end of the receiving tube (1).

2. The apparatus according to claim 1, characterized in that: The accommodating tube (1) is composed of multiple hollow tubes (101) connected in series through a connecting tube (4); a screen (401) is provided in the connecting tube (4).

3. The apparatus according to claim 2, characterized in that: The accommodating tube (1) is composed of 2 to 8 hollow tubes (101) connected in series through a connecting tube (4).

4. The apparatus according to claim 3, characterized in that: The accommodating tube (1) is composed of 3 to 5 hollow tubes (101) connected in series through a connecting tube (4).

5. The apparatus according to claim 2, characterized in that: The sieve aperture of the partition sieve (401) is 0.1~3mm.

6. The apparatus according to claim 5, characterized in that: The sieve aperture of the partition sieve (401) is 0.15~1.5mm.

7. The apparatus according to claim 2, characterized in that: The first plug (2) and the second plug (3) are both screw plugs; the connecting pipe (4) is a threaded joint.

8. The apparatus according to claim 2, characterized in that: The device also includes a support (5); the support (5) includes a foot platform (501), a support column (502) and a crossbeam (503); the two ends of the crossbeam (503) are respectively connected to a foot platform (501) through a vertically set support column (502); multiple slots (504) are evenly opened along its axial direction on the crossbeam (503); the receiving tube (1) is vertically placed on the support (5) through the slots (504).

9. The apparatus according to claim 8, characterized in that: The number of the multiple said checkpoints (504) is 2 to 10.

10. The apparatus according to claim 9, characterized in that: The number of the multiple said checkpoints (504) is 3 to 8.

11. The apparatus according to claim 8, characterized in that: A horizontal bubble meter (505) is also installed on the crossbeam (503).

12. The apparatus according to claim 11, characterized in that: The horizontal bubble meter (505) is embedded in the surface of the middle beam of the crossbeam (503).

13. The apparatus according to claim 8, characterized in that: An annular groove (102) extending circumferentially is provided on the wall of any hollow tube (101), and the inner diameter of the annular groove (102) is consistent with the diameter of the bayonet (504); the receiving tube (1) is vertically mounted on the support (5) through the annular groove (102) and the bayonet (504).

14. The apparatus according to claim 2, characterized in that: Each hollow tube (101) also has a liquid outlet (103) on its wall; and / or A drain piston (6) is also provided through the first plug (2); the piston end of the drain piston (6) extends into the receiving tube (1), and the other end of the drain piston (6) protrudes to the outside of the first plug (2).

15. The apparatus according to claim 14, characterized in that: A thread is provided inside the liquid inlet (103), and a bolt is installed through the thread.

16. The apparatus according to claim 14, characterized in that: The drain piston (6) and the first plug (2) are connected by threads.

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