Method and apparatus for cleaning a test mold with asphalt binder

Abstract

The application discloses a cleaning method and device for asphalt mortar and mortar test moulds, which comprises the following steps: freezing the test moulds after the test is finished and the test moulds are attached with asphalt binders; knocking off the big asphalt on the test moulds after the freezing; then, storing the test moulds in a refrigerator for a period of time; then, oscillating the test moulds; cleaning the test moulds under the oscillation condition after the test moulds are oscillated for a period of time; and repeatedly oscillating and cleaning the test moulds to obtain the cleaned test moulds. The application can clean the asphalt attached to the test moulds without using the cleaning agents such as kerosene, gasoline and trichloroethylene, so that the health of the test personnel is not harmed, and no industrial waste liquid needs to be treated, and the application is more environment-friendly.

Description

Technical Field

[0001] This invention relates to the field of road asphalt testing technology, and in particular to a cleaning method and apparatus for a test mold with attached asphalt binder. Background Technology

[0002] Asphalt pavement boasts advantages such as smooth surface, comfortable driving, wear resistance, and short construction period, making it one of the world's major road surface types. With the rapid development of urban road construction in recent years, the demand for high-performance asphalt materials is also expanding rapidly. Whether the performance requirements of asphalt materials meet construction requirements directly determines the service life of asphalt pavement. Therefore, a large amount of experimental and field testing data is needed to evaluate the performance of asphalt mastic and mortar. However, after obtaining the performance data of asphalt mastic and mortar, cleaning the test molds becomes a time-consuming and labor-intensive task.

[0003] Traditional testing molds are cleaned using kerosene, gasoline, or even trichloroethylene. First, after the asphalt material softens at high temperatures, the area to be cleaned increases, even penetrating into hard-to-reach corners, increasing cleaning difficulty. High-temperature operations also pose safety hazards. Second, kerosene, gasoline, and trichloroethylene have a certain cost. Furthermore, when these cleaning agents come into contact with the hot asphalt mold, they release harmful gases; trichloroethylene is a highly volatile and toxic chemical that can harm the health of testing personnel. Finally, after repeated use to clean asphalt molds, the cleaning agents become industrial wastewater requiring additional treatment. Summary of the Invention

[0004] To address the aforementioned problems, the present invention provides a method and apparatus for cleaning a test mold with attached asphalt binder.

[0005] The technical solution adopted in this invention is: a cleaning method for a test mold with attached asphalt binder, comprising the following steps:

[0006] The test mold containing the asphalt binder after testing is frozen at -20 to -10°C. After freezing, large pieces of asphalt (weighing 2-15g) are removed from the test mold. The test mold is the mold used to test the performance of asphalt binder or asphalt mortar; preferably, the freezing time is 10-20 minutes.

[0007] The test mold was refrigerated at -5 to 0°C, with the preferred refrigeration temperature being 0°C and the preferred refrigeration time being 10 to 20 minutes.

[0008] The test mold is then vibrated at -5 to 0°C to cause it to collide and the asphalt on it falls off. Preferably, the vibration frequency is 10 to 30 Hz. Each vibration lasts for 5 to 15 minutes.

[0009] The test mold was cleaned with cold water at -5 to 0°C; the preferred temperature of the cold water was 0°C.

[0010] The test mold is subjected to several cycles of vibration and cleaning until a clean test mold is obtained.

[0011] Preferably, the step of oscillating the test mold at a set frequency to cause the test mold to collide includes the following steps:

[0012] Place the test mold into a sealed container;

[0013] An oscillation with a frequency of 10~30Hz is applied to a sealed container;

[0014] The test mold is made to collide with the inner wall of the sealed container and / or other test molds.

[0015] Preferably, the process of cleaning the test mold with water includes:

[0016] Cold water was injected into the sealed container, covering the test mold.

[0017] The sealed container is kept in an oscillating state for cleaning, then the oscillation is stopped and the water in the sealed container is drained.

[0018] The present invention also discloses a cleaning device for a test mold with an attached asphalt binder, comprising:

[0019] A freezing chamber is used to freeze test molds containing asphalt binder.

[0020] First cold storage room;

[0021] A sealed container, wherein the sealed container houses the test mold, and the sealed container is disposed in the first cold storage chamber;

[0022] An oscillation system is disposed at the bottom of the sealed container and is used to generate oscillations in the sealed container;

[0023] A cleaning system is used to clean the test mold inside the sealed container;

[0024] A refrigeration system is used to adjust the temperature of the first refrigerator compartment and the freezer compartment.

[0025] Preferably, the cleaning system includes:

[0026] The second cold storage compartment is used to store water, and the refrigeration system is also used to adjust the water temperature in the second cold storage compartment.

[0027] A water extraction and drainage system is used to extract water from the second refrigerator compartment into the sealed container and to drain water from the sealed container.

[0028] A water level monitoring system is used to monitor the water content in the second cold storage compartment and the amount of water pumped into the sealed container.

[0029] Preferably, the sealed container is provided with a filter screen at the bottom and a cover plate at the top.

[0030] The beneficial effects of this invention are as follows: This invention first freezes the test mold, utilizing the low-temperature brittleness of asphalt. After freezing, large pieces of asphalt are knocked off the mold, removing most of the asphalt. The asphalt is then left to stand at a low temperature, allowing it to fully embrittle. Next, the mold is vibrated to cause collisions, breaking the attached asphalt. After maintaining this process for a period, the mold is cleaned to remove the asphalt. This vibration and cleaning process is repeated several times, resulting in a clean test mold. This method removes the asphalt from the mold without the need for cleaning agents such as kerosene, gasoline, or trichloroethylene, thus avoiding harm to the health of testing personnel and eliminating the need for industrial waste treatment, making it more environmentally friendly. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a flowchart of the method of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the device of the present invention.

[0034] In the diagram: 1. Freezer compartment; 2. First refrigerator compartment; 3. Sealed container; 31. Filter screen; 32. Cover plate; 4. Shaking system; 5. Cleaning system; 51. Second refrigerator compartment; 52. Drainage system; 53. Water level monitoring system; 6. Refrigeration system. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] In the description of this invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientations or positional relationships 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.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections 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.

[0038] Example 1

[0039] like Figure 1 As shown, a method for cleaning a test mold with attached asphalt binder includes the following steps:

[0040] (1) Freeze the test mold with asphalt binder attached after the test at -20~-10℃ for 10~20min. After freezing, knock off the large pieces of asphalt on the test mold. Large pieces of asphalt refer to asphalt weighing 2~15g.

[0041] (2) The test mold is refrigerated at -5~0℃ (preferably 0℃) for 10~20 min. In order to maintain the low-temperature brittleness of the asphalt, the refrigeration temperature is set to -5~0℃. If the temperature is lower than 0℃, the water will partially freeze during the water injection process. However, since the oscillation is maintained during the water injection process and the cleaning time is short, only a small part freezes, and the ice formed during the oscillation process will also break. The refrigeration temperature is more preferably 0℃, so that the water will not freeze and the low-temperature brittleness of the asphalt can be maintained. This is also the reason why the same temperature is used in steps (2) and (4).

[0042] (3) The test mold is vibrated at -5~0℃ (preferably 0℃) to cause it to collide and the asphalt on it to fall off. The specific vibration method is as follows: the test mold is placed in a sealed container; vibration is applied to the sealed container at a frequency of 10~30Hz, and each vibration lasts for 5~15 minutes; the test mold collides with the inner wall of the sealed container and / or other test molds. By placing the test mold in a sealed container, the test mold collides with the inner wall of the sealed container during vibration, or multiple test molds are placed in the sealed container, and they also collide with each other during vibration, thereby improving the asphalt breaking effect. Vibration only needs to cause the test mold to collide and break the attached asphalt, so a vibration frequency of 10~30Hz is used. Vibration can be generated by driving an eccentric wheel, and can be horizontal or vertical.

[0043] (4) Clean the test mold with cold water at -5~0℃ (preferably 0℃); the process of cleaning the test mold with water includes: injecting water into the sealed container and submerging the test mold; maintaining the oscillation state of the sealed container for cleaning, then stopping the oscillation and draining the water from the sealed container.

[0044] (5) Perform several vibration and cleaning operations on the test mold (repeat steps 3 and 4) until a clean test mold is obtained.

[0045] This invention first freezes the test mold, utilizing the low-temperature brittleness of asphalt. After freezing, large pieces of asphalt are knocked off the mold, removing most of the asphalt. The mold is then left to stand at a low temperature, allowing the asphalt adhering to the mold to fully embrittle. Next, the mold is vibrated, causing collisions that break up the adhering asphalt. After maintaining this process for a period, the mold is cleaned to remove the asphalt. This vibration and cleaning process is repeated several times, resulting in a clean test mold. This method removes the asphalt from the mold without the need for cleaning agents such as kerosene, gasoline, or trichloroethylene, thus avoiding harm to the health of testing personnel and eliminating the need for industrial waste treatment, making it more environmentally friendly.

[0046] Example 2

[0047] like Figure 2 As shown, a cleaning device for a test mold with attached asphalt binder includes:

[0048] Freezing chamber 1 is used to freeze test molds with attached asphalt binder;

[0049] First cold storage compartment 2;

[0050] A sealed container 3 is used to house the test mold and is located within the first cold storage chamber 2. A filter screen 31 is installed at the bottom of the sealed container 3, and a cover plate 32 is installed at the top. The bottom of the sealed container has a drain pipe, and the top has a water inlet pipe. The drain pipe has a drain valve, and the water inlet pipe is connected to the drainage system 52 described below. The drain valve is a solenoid valve connected to the drainage system 52. Drainage can be achieved by gravity flowing downwards naturally, or by using a pump connection; various methods are acceptable without strict requirements.

[0051] An oscillation system 4 is disposed at the bottom of the sealed container 3 and is used to generate oscillations in the sealed container 3.

[0052] Cleaning system 5 is used to clean the test mold inside the sealed container 3;

[0053] The cleaning system 5 includes:

[0054] The second cold storage compartment 51 is used to store water, and the refrigeration system is also used to adjust the water temperature in the second cold storage compartment.

[0055] A water pumping system 52 is used to pump water from the second refrigerator compartment 51 into the sealed container 3 and to drain water from the sealed container 3.

[0056] The water level monitoring system 53 is used to monitor the water content in the second cold storage compartment 51 and the amount of water pumped into the sealed container 3.

[0057] The refrigeration system 6 is used to adjust the temperature inside the first refrigerator compartment 2, the second refrigerator compartment 51 and the freezer compartment 1.

[0058] In this specific embodiment, the oscillation system 4 adopts a gyro oscillator.

[0059] The following is a preferred implementation method:

[0060] The cleaning ability of the six sets of ductility test molds was tested. The specific operation was as follows:

[0061] 1) Take out 6 clean test molds, measure their total mass as 1487.52g, and then conduct an asphalt bonding test on the test molds. After the test, take out the test molds with attached asphalt binder.

[0062] 2) Two hours before using the device, connect the power supply and press the power button. The refrigeration system 6 and the drainage system 52 will start. The water level monitoring system will determine the amount of water to be pumped based on the water level. After reaching 8L of water, no more water will be added to the second refrigerator compartment. After 1.5 hours, the refrigeration system will maintain the temperature of the first refrigerator compartment 2 and the second refrigerator compartment 51 at 0℃; and the temperature of the freezer compartment 1 will be -18℃.

[0063] 3) After the test, the test mold with a large amount of asphalt attached was placed in the freezer at -18℃ for freezing. After 10 minutes, it was taken out and most of the asphalt was broken. Its total mass was measured to be 1513.22g.

[0064] 4) Open the cover 31 of the sealed container 3, put in the test mold, close the cover 31, and refrigerate the test mold for 20 minutes;

[0065] 5) Start the oscillation system 4 to generate oscillations at a frequency of 10Hz in the sealed container 3 for 8 minutes;

[0066] 6) Start the pumping and drainage system 52. The pumping and drainage system 52 inputs 1.5L of water into the sealed container 3. The sealed container 3 continues to oscillate at a frequency of 10Hz.

[0067] 7) After 8 minutes of oscillation and cleaning, the oscillation system 4 is stopped, the drain valve of the sealed container 3 is opened, and the valve is closed again after drainage is completed;

[0068] 8) Repeatedly turn on the oscillation system 4 to generate oscillations at a frequency of 10Hz in the sealed container 3 for 8 minutes;

[0069] 9) Start the drainage system 52. The drainage system will input 1.5L of water into the sealed container to clean the test mold, while the oscillation system 4 will continue to oscillate at a frequency of 10Hz.

[0070] 10) After oscillating and cleaning for 1 minute, the oscillation system 4 stops working, the drain valve of the sealed container 3 is opened, and the valve is closed again after drainage is completed;

[0071] 11) Repeatedly turn on the oscillation system 4 to generate oscillations at a frequency of 10 Hz in the sealed container 3 for 8 minutes;

[0072] 12) The pumping and drainage system is started. The pumping and drainage system 52 inputs 3L of water into the sealed container 3. The sealed container continues to oscillate at a frequency of 10Hz.

[0073] 13) After 5 minutes of oscillation cleaning, the oscillation system 4 is shut off, the outlet valve of the sealed container 3 is opened, and the valve is closed after drainage is completed;

[0074] 14) Remove the test mold, wipe it dry, and measure its total mass: 1487.96g;

[0075] 15) Compare the appearance before and after use. The quality and appearance before and after cleaning show that the device has a good cleaning ability for the test mold.

[0076] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for cleaning a test mold with attached asphalt binder, characterized in that, Includes the following steps: After the test is completed and the asphalt binder is attached, freeze the test mold at -20~-10℃ for 10~20 minutes. After freezing, knock off the large pieces of asphalt on the test mold. Refrigerate the test mold at -5~0℃ for 10~20 minutes; Then, under conditions of -5 to 0℃, the test mold is placed in a sealed container, and an oscillation frequency of 10 to 30 Hz is applied to the sealed container to cause the test mold to collide with the inner wall of the sealed container and / or other test molds, causing the asphalt on the test mold to fall off. Each oscillation lasts for 5 to 15 minutes. The test mold was cleaned with cold water at -5 to 0 degrees Celsius. The test mold is subjected to several cycles of vibration and cleaning until a clean test mold is obtained.

2. The cleaning method for a test mold with attached asphalt binder according to claim 1, characterized in that, The process of cleaning the test mold with water includes: Cold water was injected into the sealed container, covering the test mold. The sealed container is kept in an oscillating state for cleaning, then the oscillation is stopped and the water in the sealed container is drained.

3. The cleaning method for a test mold with attached asphalt binder according to claim 1, characterized in that, The refrigeration temperature of the test mold is 0°C, and the temperature of the cold water is 0°C.

4. A cleaning device for a test mold with attached asphalt binder, applied to the cleaning method for a test mold with attached asphalt binder as described in claims 1-3, characterized in that, include: A freezing chamber is used to freeze test molds containing asphalt binder. First cold storage room; A sealed container is provided to house the test mold and is located in the first refrigerator compartment. The sealed container has a filter screen at the bottom and a cover plate at the top. An oscillation system is disposed at the bottom of the sealed container and is used to generate oscillations in the sealed container; A cleaning system is used to clean the test mold inside the sealed container. The cleaning system includes: a second cold storage compartment, a drainage system, and a water level monitoring system. The second cold storage compartment is used to store water, and the refrigeration system is also used to adjust the water temperature inside the second cold storage compartment. The drainage system is used to pump water from the second cold storage compartment into the sealed container and to drain the water from the sealed container. The water level monitoring system is used to monitor the water content inside the second cold storage compartment and the amount of water pumped into the sealed container. A refrigeration system is used to adjust the temperature of the first refrigerator compartment and the freezer compartment.

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