CN112798517A - Accelerated aging test system for pavement structural material - Google Patents
Accelerated aging test system for pavement structural material Download PDFInfo
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- CN112798517A CN112798517A CN202110138681.8A CN202110138681A CN112798517A CN 112798517 A CN112798517 A CN 112798517A CN 202110138681 A CN202110138681 A CN 202110138681A CN 112798517 A CN112798517 A CN 112798517A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/002—Test chambers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/004—Investigating resistance of materials to the weather, to corrosion, or to light to light
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Abstract
The invention discloses an accelerated aging test system for a pavement structure material, and belongs to the field of mechanical engineering, civil engineering and road engineering. The system comprises: the shell is provided with an ultraviolet radiation subsystem and a temperature control subsystem; the ultraviolet radiation subsystem is used for emitting ultraviolet radiation to the inner space of the shell; the temperature control subsystem is used for adjusting the ambient temperature in the shell. By adopting the invention, the tested pavement structure material is subjected to ultraviolet radiation and a temperature field, so that the tested pavement structure material is closer to the actual service environment condition, and the accelerated aging test can be effectively and accurately carried out on the pavement structure material.
Description
Technical Field
The invention relates to the field of mechanical engineering, civil engineering and road engineering, in particular to an accelerated aging test system for a pavement structure material.
Background
Since the innovation is open, with the improvement of economic strength, China realizes the rapid increase of the total amount of the traffic infrastructure. Since the asphalt pavement has significant advantages in terms of driving comfort and convenience in maintenance and repair, it is dominant in pavement design. However, as a typical material susceptible to heat, oxygen and sunlight, it is highly susceptible to aging during pavement construction and use, causing many aging-related problems that severely affect the service life of asphalt pavement. The aging rate of the asphalt is greatly accelerated under the irradiation of high-intensity ultraviolet rays, and the time for generating diseases on the pavement is also advanced. In addition, temperature is an important factor influencing the mechanical properties of asphalt pavement materials, and the temperature influences the shear strength and creep property of asphalt so as to influence the service performance of the asphalt. If the pavement is not maintained and maintained in time, the service life of the pavement is greatly reduced, so that a large amount of economic loss is brought to the country, and the resource waste is also caused, therefore, the research on the material performance characteristics of the pavement structure material under the coupling action of ultraviolet radiation and temperature is very important.
At present, an accelerated aging test device is used for simulating accelerated tests of roads with different materials and different structures in special regional environments. The test is used for simulating real conditions, and a long-term rule can be obtained in a short-term test, so that the method is the most effective method for testing the performance of the asphalt pavement. However, the existing accelerated aging test device (such as an ultraviolet aging test device) has simpler functions, mostly only can simulate lower ultraviolet radiation intensity, lacks a high-temperature and low-temperature control system, and cannot simulate an actual environment field more truly, so that the ultraviolet radiation/temperature coupling aging condition of the pavement structure material cannot be accurately reflected.
Disclosure of Invention
In order to solve the problem that the existing ultraviolet aging test device cannot accurately reflect the ultraviolet radiation/temperature coupling aging condition of the pavement structure material, the embodiment of the invention provides an accelerated aging test system for the pavement structure material, which can simulate the ultraviolet and temperature conditions of an actual environment field and carry out an ultraviolet radiation/temperature coupling accelerated aging test on the pavement structure material. The technical scheme is as follows:
in a first aspect, a system for accelerated aging test of pavement structure material is provided, which comprises: the shell is provided with an ultraviolet radiation subsystem and a temperature control subsystem; the ultraviolet radiation subsystem is used for emitting ultraviolet radiation to the inner space of the shell; the temperature control subsystem is used for adjusting the ambient temperature in the shell.
Optionally, the system for testing accelerated aging of a pavement structure material further includes: and the temperature monitoring subsystem is arranged in the shell and is used for monitoring the temperature of the specified position in the shell in real time.
Optionally, the ultraviolet radiation subsystem includes a controller installed outside the housing and several ultraviolet lamp sets installed inside the housing;
the controller is used for controlling the ultraviolet lamp groups to emit ultraviolet light with specified radiation intensity, and the controller controls each ultraviolet lamp group independently so as to form different ultraviolet radiation intensity areas in the shell and simulate ultraviolet radiation in sunlight.
Optionally, the ultraviolet lamp set includes: a plurality of ultraviolet point light sources, a plurality of emitters and a heat sink;
the ultraviolet point light source is arranged on the heat dissipation device and used for emitting ultraviolet light with specified radiation intensity under the control of the controller;
the emitter is arranged on one side of the heat dissipation device facing the interior of the shell and used for emitting ultraviolet light generated by the ultraviolet point light source to each designated area of the interior space of the shell;
and the heat dissipation device is used for dissipating heat of the ultraviolet point light source and the emitter.
Optionally, the controller receives an adjustment instruction through a control screen or a control button mounted on the housing, and adjusts the ultraviolet radiation intensity of the ultraviolet lamp set according to the adjustment instruction.
Optionally, the temperature monitoring subsystem includes: the temperature sensor comprises a plurality of thermal resistance temperature sensors, a resistance conditioner and a temperature display;
the plurality of thermal resistance temperature sensors are respectively arranged at a plurality of designated positions in the shell, and each thermal resistance temperature sensor is used for acquiring temperature information of the position where the thermal resistance temperature sensor is positioned in real time and converting the temperature information into an electric signal for representing temperature to be output;
the resistance conditioner is arranged outside the shell and used for conditioning the electric signals output by the thermal resistance temperature sensor to obtain corresponding temperature information and sending the temperature information to the temperature display for real-time display.
Optionally, the temperature control subsystem comprises:
the circulating air conditioning unit is arranged on the shell, and the ventilation module is arranged on the side wall of the shell.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
in the embodiment of the invention, a test system capable of simulating sunlight ultraviolet radiation and environment temperature is provided, wherein the ultraviolet radiation intensity and the environment temperature are adjustable, and ultraviolet radiation and a temperature field can be applied to a tested pavement structure material, so that the tested pavement structure material is closer to the actual service environment condition, and the accelerated aging test can be effectively and accurately performed on the pavement structure material.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a first embodiment of a system for accelerated aging testing of a pavement structural material according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of a system for accelerated aging testing of a pavement structural material according to an embodiment of the present invention;
FIG. 3 is a schematic view of a UV lamp assembly;
FIG. 4 is a schematic diagram of the controller structure;
FIG. 5 is a schematic structural diagram of a third embodiment of a system for accelerated aging testing of a pavement structural material according to an embodiment of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a pavement structure material accelerated aging test system, as shown in figure 1, the system comprises: the device comprises a shell 1, an ultraviolet radiation subsystem 2 and a temperature control subsystem 3 which are arranged on the shell 1; an ultraviolet radiation subsystem 2 for emitting ultraviolet radiation to the inner space of the housing 1; a temperature control subsystem 3 for regulating the ambient temperature inside the housing 1.
As an alternative embodiment, the uv radiation subsystem 2 includes a controller installed outside the housing (installed towards the outside of the housing) and several uv lamp sets installed inside the housing (installed towards the inside of the housing); for example, as shown in fig. 1, the uv radiation subsystem 2 is mounted on the upper surface of the housing 1, wherein the operation control terminal of the controller and the like are mounted toward the upper surface of the housing, and the uv lamp set is mounted on the back of the controller, i.e., the output terminal of the uv lamp set is mounted toward the inner side of the housing 1, so that the uv light output from the uv lamp set can be radiated to the inner space of the housing 1. The controller is used for controlling the ultraviolet lamp groups to emit ultraviolet light with specified radiation intensity, and the controller controls each ultraviolet lamp group independently so as to form different ultraviolet radiation intensity areas in the shell and simulate ultraviolet radiation in sunlight. For example: if the ultraviolet radiation subsystem 2 comprises 10 × 10 arrays of ultraviolet lamp sets arranged on the upper side surface of the shell 1, the controller is electrically connected with the control ends of the 100 ultraviolet lamp sets respectively, and the controller is used for independently controlling each ultraviolet lamp set and adjusting the ultraviolet radiation intensity of the ultraviolet lamp sets at different positions. Obviously, the uv radiation subsystem may be mounted on any side of the housing 1, except for the upper side of the housing 1 as shown in fig. 1, as long as the input end of the controller and the output end of the uv lamp set are directed to the outside and the inside of the housing 1, respectively.
Fig. 2 is a schematic structural diagram of a second embodiment of the accelerated aging test system for a pavement structure material according to an embodiment of the present invention. In this embodiment, on the basis of the structure of the first embodiment of the system shown in fig. 1, further, the system for testing accelerated aging of a pavement structure material further includes:
and the temperature monitoring subsystem 4 is arranged inside the shell 1 and is used for monitoring the temperature of the specified position in the shell 1 in real time.
As shown in fig. 3, which is a schematic structural diagram of the uv lamp set, as shown in the figure, the uv lamp set includes: a plurality of ultraviolet point light sources 21, a plurality of emitters 23 and a heat sink 22; the ultraviolet point light source 21 is arranged on the heat dissipation device 22 and used for emitting ultraviolet light with specified radiation intensity under the control of the controller; an emitter 23, mounted on one side of the heat sink 22 facing the inside of the housing 1, for emitting the ultraviolet light generated by the ultraviolet point light source 21 to each designated area of the internal space of the housing 1; the heat dissipation device 22 is used not only as a support and a mounting member for the ultraviolet point light source 21 and the emitter 23, but also for dissipating the heat 23 from the ultraviolet point light source 21 and the emitter.
As shown in fig. 4, which is a schematic structural diagram of a controller, as shown in the figure, the controller receives an adjustment instruction through a control screen 24 or a control button 25 mounted on the housing 1, and adjusts the ultraviolet radiation intensity of the ultraviolet lamp set according to the adjustment instruction. Preferably, the controller further comprises a power switch.
In an alternative embodiment, the temperature monitoring subsystem 4 includes: the temperature sensor comprises a plurality of thermal resistance temperature sensors, a resistance conditioner and a temperature display; the plurality of thermal resistance temperature sensors are respectively arranged at a plurality of designated positions in the shell 1, and each thermal resistance temperature sensor is used for acquiring temperature information of the position where the thermal resistance temperature sensor is located in real time and converting the temperature information into an electric signal for representing temperature and outputting the electric signal; the thermal resistance temperature sensor is a sensor thermometer for measuring temperature by using the principle that the resistance value of a conductor or a semiconductor changes along with the temperature change. And the resistance conditioner is arranged outside the shell 1 and used for conditioning the electric signals output by the thermal resistance temperature sensor to obtain corresponding temperature information and sending the temperature information to the temperature display for real-time display.
In this embodiment, the temperature display may be an independent display, or may be integrated on the control screen 24, that is, the control screen 24 may also be used to display the positions of the detection points and the temperature information of the positions in the housing 1, so as to form two-dimensional temperature field division information.
Fig. 5 is a schematic structural diagram of a third embodiment of a system for testing accelerated aging of a pavement structural material according to an embodiment of the present invention. In this embodiment, on the basis of the structure of the second embodiment of the system shown in fig. 2, the temperature control subsystem 3 further includes: a circulation air conditioner unit 31 mounted on the casing 1, and a ventilation module 32 provided on a side wall of the casing 1.
According to the accelerated aging test system for the pavement structure material, provided by the embodiment of the invention, ultraviolet radiation and a temperature field are applied to the tested pavement structure material, so that the tested pavement structure material is closer to the actual service environment condition, and the accelerated aging test can be effectively and accurately carried out on the pavement structure material.
Further, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
It should be noted that the above describes only a preferred embodiment of the invention and that, although a preferred embodiment of the invention has been described, it will be apparent to those skilled in the art that, once having the benefit of the teachings of the present invention, numerous modifications and adaptations can be made without departing from the principles of the invention and are intended to be within the scope of the invention. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Claims (7)
1. The utility model provides a road surface structural material accelerated aging test system which characterized in that includes: the shell is provided with an ultraviolet radiation subsystem and a temperature control subsystem; the ultraviolet radiation subsystem is used for emitting ultraviolet radiation to the inner space of the shell; the temperature control subsystem is used for adjusting the ambient temperature in the shell.
2. The accelerated aging test system for a pavement structure material according to claim 1, further comprising: and the temperature monitoring subsystem is arranged in the shell and is used for monitoring the temperature of the specified position in the shell in real time.
3. The accelerated aging test system for pavement structure materials according to claim 1 or 2, wherein the ultraviolet radiation subsystem comprises a controller installed outside the casing and a plurality of ultraviolet lamp sets installed inside the casing;
the controller is used for controlling the ultraviolet lamp groups to emit ultraviolet light with specified radiation intensity, and the controller controls each ultraviolet lamp group independently so as to form different ultraviolet radiation intensity areas in the shell and simulate ultraviolet radiation in sunlight.
4. The accelerated aging test system for pavement structure materials according to claim 3, wherein the ultraviolet lamp set comprises: a plurality of ultraviolet point light sources, a plurality of emitters and a heat sink;
the ultraviolet point light source is arranged on the heat dissipation device and used for emitting ultraviolet light with specified radiation intensity under the control of the controller;
the emitter is arranged on one side of the heat dissipation device facing the interior of the shell and used for emitting ultraviolet light generated by the ultraviolet point light source to each designated area of the interior space of the shell;
and the heat dissipation device is used for dissipating heat of the ultraviolet point light source and the emitter.
5. The accelerated aging test system for pavement structure materials according to claim 3, wherein the controller receives an adjustment instruction through a control screen or a control button installed on the housing, and adjusts the ultraviolet radiation intensity of the ultraviolet lamp set according to the adjustment instruction.
6. The accelerated aging test system for pavement construction materials of claim 2, wherein the temperature monitoring subsystem includes: the temperature sensor comprises a plurality of thermal resistance temperature sensors, a resistance conditioner and a temperature display;
the plurality of thermal resistance temperature sensors are respectively arranged at a plurality of designated positions in the shell, and each thermal resistance temperature sensor is used for acquiring temperature information of the position where the thermal resistance temperature sensor is positioned in real time and converting the temperature information into an electric signal for representing temperature to be output;
the resistance conditioner is arranged outside the shell and used for conditioning the electric signals output by the thermal resistance temperature sensor to obtain corresponding temperature information and sending the temperature information to the temperature display for real-time display.
7. The system for accelerated aging testing of pavement construction materials according to claim 1 or 2, wherein the temperature control subsystem comprises:
the circulating air conditioning unit is arranged on the shell, and the ventilation module is arranged on the side wall of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138681.8A CN112798517A (en) | 2021-02-01 | 2021-02-01 | Accelerated aging test system for pavement structural material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138681.8A CN112798517A (en) | 2021-02-01 | 2021-02-01 | Accelerated aging test system for pavement structural material |
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| CN112798517A true CN112798517A (en) | 2021-05-14 |
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| CN202110138681.8A Pending CN112798517A (en) | 2021-02-01 | 2021-02-01 | Accelerated aging test system for pavement structural material |
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2021
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