CN221811749U - A test device for simulating asphalt aging under different air pressure conditions - Google Patents

Abstract

The utility model relates to the field of road engineering materials, and discloses a test device for simulating the aging of asphalt under different air pressure conditions, including a device body, a sealed compartment is arranged inside the device body, a water storage barrel is arranged on the left side of the outside of the device body, an air pump is arranged at the bottom of the water storage barrel, a blower is arranged at the bottom of the air pump, a control screen is arranged on the outer wall of the device body, a lamp is fixedly connected to the top wall of the device body, a water pipe is arranged inside the device body, a nozzle is arranged on the outer wall of the water pipe, and a sample table is fixedly connected to the bottom wall of the device body. In the utility model, firstly, the simulation of different air pressure conditions is realized by the air pump and the blower, so that the asphalt aging results are more comprehensive and accurate, and secondly, the thermal oxidation aging, photo-oxidation aging and water aging of the asphalt material are simulated simultaneously by the temperature control system, the lamp and the water pipe.

Description

A test device for simulating asphalt aging under different air pressure conditions

Technical Field

The utility model relates to the field of road engineering materials, in particular to a test device for simulating asphalt aging under different air pressure conditions.

Background Art

Asphalt aging is the process from the production of asphalt to the change of its properties and internal structure, which leads to the decline of road performance. In this process, the aging stage includes storage, transportation, mixture preparation and later pavement use. The main factors affecting aging are external factors, such as heating, oxygen, light and water. Asphalt aging mainly occurs during the mixing of mixtures and road use, and gradually occurs over time. The aging rate is directly related to the service life of the pavement and is the main factor affecting the durability of asphalt pavement. In order to evaluate asphalt aging, the rotating film oven test and the film oven test are used in the asphalt technical standards of my country for evaluation. Short-term aging and long-term aging test methods are also used for evaluation at different stages. Three methods of short-term aging are summarized: oven aging method, delayed mixing method and microwave heating method; three methods of long-term aging are summarized: pressurized oxidation treatment, delayed oven heating and infrared or ultraviolet treatment. However, these aging methods only simulate the temperature and oxygen coupling environment, which is quite different from the aging environment of asphalt pavement in the real natural environment, and cannot comprehensively and accurately evaluate the anti-aging performance of asphalt materials in the real natural environment.

At present, the Chinese patent with application number CN202310589657 discloses an asphalt aging device, including a device body, the device body includes a test box arranged in the device body, a movable door is installed on one side of the test box, a tray is rotatably connected in the test box, a number of test parts are arranged at equal intervals on the tray, and a test sample is arranged in the test part, and a first cavity is arranged on the side of the device body away from the test box, a return water part is fixedly connected in the first cavity, and the return water part is connected to the test box, and a spray part is fixedly connected to the top surface of the test box, and the spray part is connected to the return water part. Open the movable door, put the asphalt sample to be aged into the test sample, and fix the test sample to prevent the test sample from loosening during the rotation process, and simulate the influence of precipitation, light and ultraviolet rays on the aging speed of asphalt according to the test requirements. The invention can simulate the influence of various factors on the aging of asphalt materials, so as to more comprehensively and accurately evaluate the anti-aging performance of asphalt materials in real natural environments.

However, for asphalt used in high-altitude areas, this device cannot simulate the air pressure conditions in the area, making the aging results incomplete and inaccurate. Therefore, further improvements need to be made to the asphalt aging device.

Utility Model Content

In order to make up for the above shortcomings, the utility model provides a test device for simulating the aging of asphalt under different air pressure conditions, aiming to improve the asphalt used in high-altitude areas. This device cannot simulate the air pressure conditions in the area, making the aging results not comprehensive and accurate.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a test device for simulating the aging of asphalt under different air pressure conditions, comprising a device body, a sealed chamber is arranged inside the device body, a water storage barrel is arranged on the left side outside the device body, a vacuum pump is arranged at the bottom of the water storage barrel, a blower is arranged at the bottom of the vacuum pump, a control panel is arranged on the outer wall of the device body, a lamp tube is fixedly connected to the top wall inside the device body, a water pipe is arranged inside the device body, a nozzle is arranged on the outer wall of the water pipe, a sample table is fixedly connected to the bottom wall inside the device body, a temperature sensor is fixedly connected to the left side wall inside the device body, an air pressure sensor is fixedly connected to the left side wall inside the device body, and a water storage tank is opened on the bottom wall inside the device body.

As a further description of the above technical solution:

A waste water bucket is arranged on the right side of the outside of the device body.

As a further description of the above technical solution:

A movable door is installed on one side of the sealed bin.

As a further description of the above technical solution:

The device body is connected to the water storage bucket, the air extractor, the blower and the waste water bucket.

As a further description of the above technical solution:

The lamp tube is fixedly connected above the sealed chamber, and a temperature control system is arranged inside the sealed chamber.

As a further description of the above technical solution:

The water pipe and the nozzle are arranged in the middle of the sealed chamber.

As a further description of the above technical solution:

The control panel is connected to the sealed warehouse temperature control system, the lamp tube, the water pipe, the nozzle, the water storage bucket, the air extractor and the blower.

As a further description of the above technical solution:

The sample stage is fixedly connected below the sealing chamber, the water storage tank is arranged below the sample stage, and the water storage tank is connected to the waste water barrel.

The utility model has the following beneficial effects:

1. In the utility model, firstly, the simulation of different air pressure conditions is realized by using an air extractor and a blower, so that the asphalt aging result is more comprehensive and accurate.

2. In the utility model, the thermal oxidation aging, photo-oxidation aging and water aging of the asphalt material are simulated simultaneously through the temperature control system, the lamp tube and the water pipe.

3. In the present invention, the overall sealing of the device is ensured by the design of the water storage tank and the waste water bucket.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the planar structure of a test device for simulating asphalt aging under different air pressure conditions proposed by the present invention.

Legend:

1. Device body; 2. Sealed chamber; 3. Water storage tank; 4. Vacuum pump; 5. Blower; 6. Control panel; 7. Lamp tube; 8. Water pipe; 9. Nozzle; 10. Sample table; 11. Temperature sensor; 12. Air pressure sensor; 13. Water storage tank; 14. Waste water tank.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Referring to Figure 1, the utility model provides an embodiment: a test device for simulating asphalt aging under different air pressure conditions, including a device body 1, a sealed chamber 2 is arranged inside the device body 1, a water storage barrel 3 is arranged on the left side of the outside of the device body 1, an air pump 4 is arranged at the bottom of the water storage barrel 3, a blower 5 is arranged at the bottom of the air pump 4, a control panel 6 is arranged on the outer wall of the device body 1, a lamp tube 7 is fixedly connected to the top wall inside the device body 1, a water pipe 8 is arranged inside the device body 1, and a nozzle 9 is arranged on the outer wall of the water pipe 8, a sample table 10 is fixedly connected to the bottom wall of the device body 1, a temperature sensor 11 is fixedly connected to the left side wall inside the device body 1, and an air pressure sensor 12 is fixedly connected to the left side wall inside the device body 1, the temperature and air pressure inside the sealed chamber 2 are displayed by the temperature sensor 11 and the air pressure sensor 12 on the inner wall of the sealed chamber 2, a water storage tank 13 is opened on the bottom wall inside the device body 1, and the simulated aging light duration and ultraviolet intensity are controlled by the lamp tube 7 to achieve photo-oxidation aging.

A waste water bucket 14 is arranged on the right side of the outside of the device body 1, and a movable door is arranged on one side of the sealed chamber 2. The device body 1 is connected to the water storage bucket 3, the air extractor 4, the blower 5 and the waste water bucket 14. The lamp tube 7 is fixedly connected to the top of the sealed chamber 2. A temperature control system is arranged inside the sealed chamber 2. The temperature in the sealed chamber 2 is adjusted to simulate thermal oxidation aging. The water pipe 8 and the nozzle 9 are arranged in the middle of the sealed chamber 2. The water aging is simulated by adjusting the water spraying amount and the water spraying time. The control panel 6 is connected to the temperature control system, the lamp tube 7, and the water pipe 9 of the sealed chamber 2. 8, the nozzle 9, the water storage tank 3, the vacuum fan 4 and the blower 5, through the cooperation between them, the air pressure, temperature, water spraying and light in the sealed chamber 2 can be uniformly controlled. The sample table 10 is fixedly connected to the bottom of the sealed chamber 2, and the water storage tank 13 is arranged under the sample table 10. The water storage tank 13 is connected to the waste water tank 14. Water flows downward through the nozzle 9, flows into the water storage tank 13 after passing through the sample and the surface of the sample table 10, and then flows into the waste water tank 14 through the water storage tank 13, so as to ensure the sealing of the whole device.

Working principle: First, weigh a small amount of asphalt and spread it on the sample table, open the movable door of the sealed chamber and place the sample table directly under the nozzle of the water pipe to ensure that the water flow can be sprayed onto the surface of the asphalt sample. Close the movable door of the sealed chamber; then, connect the water storage tank, vacuum pump, blower and waste water tank, fill the water storage tank with rainwater or distilled water as required, and seal the interface of the connecting pipe with a sealing film to ensure the overall sealing of the device; then, determine the parameters on the control panel, simulate different air pressure conditions through the vacuum pump and blower; simulate the aging light duration and ultraviolet intensity through the lamp control to achieve photo-oxidation aging; simulate thermal oxidation aging by adjusting the temperature in the sealed chamber; simulate water aging by adjusting the water spraying amount and water spraying duration; from this operation, it can be seen that the utility model can not only realize the simulation of different air pressure conditions, but also simulate the thermal oxidation aging, photo-oxidation aging and water aging of asphalt materials at the same time.

Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a test device that simulation pitch ages under different atmospheric pressure conditions, includes device body (1), its characterized in that: the device comprises a device body (1), wherein a sealing bin (2) is arranged inside the device body (1), a water storage barrel (3) is arranged on the left side outside the device body (1), an air extractor (4) is arranged at the bottom of the water storage barrel (3), an air blower (5) is arranged at the bottom of the air extractor (4), a control screen (6) is arranged on the outer side wall of the device body (1), a lamp tube (7) is fixedly connected to the top wall inside the device body (1), a water pipe (8) is arranged inside the device body (1), a nozzle (9) is arranged on the outer side wall of the water pipe (8), a sample table (10) is fixedly connected to the bottom wall inside the device body (1), a temperature sensor (11) is fixedly connected to the left side wall inside the device body (1), and a water storage tank (13) is arranged on the bottom wall inside the device body (1).

2. A test apparatus for simulating asphalt ageing under different air pressure conditions as defined in claim 1, wherein: the right side outside the device body (1) is provided with a waste water bucket (14).

3. A test apparatus for simulating asphalt ageing under different air pressure conditions as defined in claim 1, wherein: a movable door is arranged on one side of the sealing bin (2).

4. A test apparatus for simulating asphalt ageing under different air pressure conditions as defined in claim 1, wherein: the device body (1) is connected with the water storage barrel (3), the air extractor (4), the air blower (5) and the wastewater barrel (14).

5. A test apparatus for simulating asphalt ageing under different air pressure conditions as defined in claim 1, wherein: the lamp tube (7) is fixedly connected above the sealing bin (2), and a temperature control system is arranged inside the sealing bin (2).

6. A test apparatus for simulating asphalt ageing under different air pressure conditions as defined in claim 1, wherein: the water pipe (8) and the nozzle (9) are arranged in the middle of the sealed bin (2).

7. A test apparatus for simulating asphalt ageing under different air pressure conditions as defined in claim 1, wherein: the control screen (6) is connected to the temperature control system of the sealed cabin (2), the lamp tube (7), the water pipe (8), the nozzle (9), the water storage barrel (3), the air extractor (4) and the blower (5).

8. A test apparatus for simulating asphalt ageing under different air pressure conditions as defined in claim 1, wherein: the sample stage (10) is fixedly connected below the sealed bin (2), the water storage tank (13) is arranged below the sample stage (10), and the water storage tank (13) is connected to the wastewater barrel (14).