CN108956438B - Ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device and method - Google Patents
Ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device and method Download PDFInfo
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- CN108956438B CN108956438B CN201810813006.9A CN201810813006A CN108956438B CN 108956438 B CN108956438 B CN 108956438B CN 201810813006 A CN201810813006 A CN 201810813006A CN 108956438 B CN108956438 B CN 108956438B
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- 239000010426 asphalt Substances 0.000 title claims abstract description 69
- 230000032683 aging Effects 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- 238000007664 blowing Methods 0.000 claims abstract description 13
- 230000004907 flux Effects 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims description 18
- 238000010998 test method Methods 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- -1 light Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
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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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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses an ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device and method, which comprises a control box, an environment box, a power assembly arranged in the control box, an object stage and a rotating shaft arranged in the environment box, wherein a control panel is arranged on the control box; the control box is positioned at the bottom of the environment box, an output shaft of the power assembly is connected with the lower end of the rotating shaft, the object stage is arranged on the rotating shaft and is distributed obliquely, the object stage is provided with a sample containing vessel, the inner wall of the environment box is provided with a plurality of ultraviolet lamps and a sensor group for detecting the temperature, the humidity and the oxygen concentration in the environment box, and an outlet of the air blowing system is communicated with an air inlet of the environment box; the control panel is connected with the control end of the blowing system, the output end of the sensor group and the control end of the power assembly, and the device and the method realize the asphalt aging test of ultraviolet intensity, temperature, oxygen flux and humidity under constant and variable modes.
Description
Technical Field
The invention relates to an asphalt aging test device and method, in particular to an ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device and method.
Background
The invention designs an aging test device for asphalt subjected to multi-factor coupling such as ultraviolet radiation, thermal oxygen, humidity and the like, and provides a test method and an index for evaluating the aging degree based on the aging test device, thereby being capable of more accurately simulating the aging of the asphalt in the natural environment and evaluating the aging degree of the asphalt subjected to the multi-factor coupling.
The aging of asphalt is affected by heat, oxygen, light, water and the like, the aging process is often long and complex, and with the aging aggravation, the chemical properties of asphalt are changed greatly, so that the asphalt pavement is hardened and cracked, and the durability and the safety of the pavement are directly affected. At present, an asphalt aging test device based on indoor tests mainly comprises a rotary film oven, a pressure aging instrument, an ultraviolet aging instrument and the like and is used for simulating short-term aging, long-term aging, ultraviolet radiation aging and the like of asphalt under the condition of hot oxygen, no corresponding test device and test method are available for simulating and explaining the aging process of the asphalt under the coupling action of multiple factors such as heat, oxygen, illumination, water and the like, and no test method for asphalt aging under the constant and variable modes of ultraviolet intensity, temperature, oxygen flux and humidity is involved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device and method, which are used for realizing asphalt aging tests under constant and variable modes of ultraviolet intensity, temperature, oxygen flux and humidity.
In order to achieve the purpose, the ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device comprises a control box, an environment box, a power assembly arranged in the control box, an object stage and a rotating shaft, wherein the object stage and the rotating shaft are arranged in the environment box;
the control box is positioned at the bottom of the environment box, an output shaft of the power assembly is connected with the lower end of the rotating shaft, the object stage is arranged on the rotating shaft and is distributed obliquely, the object stage is provided with a sample containing vessel, the inner wall of the environment box is provided with a plurality of ultraviolet lamps and a sensor group for detecting the temperature, the humidity and the oxygen concentration in the environment box, and an outlet of the air blowing system is communicated with an air inlet of the environment box;
the control panel is connected with the control end of the blowing system, the output end of the sensor group and the control end of the power assembly.
The air blowing system comprises a fan, a filtering system, a temperature adjusting device and a humidity regulator, and an outlet of the fan is communicated with an air inlet of the side wall of the environment box through the filtering system, the temperature adjusting device and the humidity adjusting device in sequence.
The sensor group comprises a temperature sensor, a humidity sensor and an oxygen sensor.
The objective table is provided with a groove, the sample containing vessel is embedded in the groove, and the sample containing vessel is of a barrel-shaped structure.
Still include the protective housing, the ultraviolet lamp is located the protective housing.
The ultraviolet lamps are respectively positioned on the top and the side wall of the environment box.
The rotating shaft can be lifted; the control panel is a touch screen display.
The ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test method comprises the following steps:
placing the asphalt in a sample container, and adjusting the temperature, humidity, oxygen flux and ultraviolet rays in an environment box by matching an air blowing system, an ultraviolet lamp and a sensor groupLinear strength, setting the rotation speed of the rotating shaft and the aging time of the asphalt on a control panel, and performing an asphalt aging test to obtain the complex shear modulus G of the asphalt with different aging times*Storage modulus G 'and loss modulus G', and then according to the complex shear modulus G of the asphalt with different aging time*Calculating the change rate upsilon of the complex shear modulus of the asphalt by the storage modulus G' and the loss modulus G ″*The change rate upsilon ' of the storage modulus and the change rate upsilon ' of the loss modulus, and then according to the change rate upsilon ' of the complex shear modulus of the asphalt*And the rate of change of storage modulus υ' and loss modulus υ "to evaluate the aging rate of the asphalt, wherein,
and
is an aging time of tn+1The complex shear modulus, storage modulus and loss modulus of the asphalt,
and
is an aging time of tnComplex shear, storage and loss moduli, t, of bitumenn+1＞tn。
The invention has the following beneficial effects:
during specific operation, the ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device and method provided by the invention regulate the temperature, humidity, oxygen flux and ultraviolet intensity in the environment box through the cooperation of the air blowing system, the ultraviolet lamp and the sensor group, and then obtain the change rate upsilon of the complex shear modulus of asphalt through tests*The asphalt aging test system comprises an asphalt aging test system, a test panel, a control panel, a blower system, an ultraviolet lamp, a control panel and a control panel, wherein the control panel is arranged in the asphalt aging test system, the control panel is arranged in the control panel, the control panel is connected with the control panel, and the control panel is connected with the control panel.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is the control box, 2 is power component, 3 is the environment case, 4 is the sensor group, 5 is the objective table, 6 is the appearance containing dish, 7 is the ultraviolet lamp, 8 is the protective housing, 9 is the axis of rotation, 10 is the blower system, 11 is control panel.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device comprises a control box 1, an environment box 3, a power assembly 2 arranged in the control box 1, an object stage 5 and a rotating shaft 9 arranged in the environment box 3, wherein a control panel 11 is arranged on the control box 1; the control box 1 is positioned at the bottom of the environment box 3, an output shaft of the power assembly 2 is connected with the lower end of the rotating shaft 9, the object stage 5 is arranged on the rotating shaft 9, the object stage 5 is distributed in an inclined mode, the object stage 5 is provided with a sample containing vessel 6, the inner wall of the environment box 3 is provided with a plurality of ultraviolet lamps 7 and a sensor group 4 for detecting the temperature, the humidity and the oxygen concentration in the environment box 3, and an outlet of the air blowing system 10 is communicated with an air inlet of the environment box 3; the control panel 11 is connected with the control end of the blower system 10, the output end of the sensor group 4 and the control end of the power assembly 2.
The air blowing system 10 comprises a fan, a filtering system, a temperature adjusting device and a humidity regulator, and an outlet of the fan is communicated with an air inlet on the side wall of the environment box 3 through the filtering system, the temperature adjusting device and the humidity adjusting device in sequence; the sensor group 4 includes a temperature sensor, a humidity sensor, and an oxygen sensor.
The invention also comprises a protective shell 8, wherein the ultraviolet lamp 7 is positioned in the protective shell 8; the ultraviolet lamps 7 are respectively positioned on the top and the side wall of the environment box 3.
A groove is arranged on the objective table 5, the sample container 6 is embedded in the groove, and the sample container 6 is of a barrel-shaped structure; the inclination angle of objective table 5 can be adjusted wantonly to the flow velocity of pitch sample in the control flourishing appearance ware 6 ensures that pitch is even ageing, and objective table 5 is high temperature resistant transparent quartz glass who passes through the ultraviolet ray with the material of flourishing appearance ware 6, ensures that pitch sample can evenly accept illumination in all directions in the flourishing appearance ware 6. In addition, the rotating shaft 9 can be lifted and lowered; the control panel 11 is a touch screen display.
The ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test method comprises the following steps:
placing asphalt in a sample vessel 6, adjusting the temperature, humidity, oxygen flux and ultraviolet intensity in an environment box 3 by matching a blower system 10, an ultraviolet lamp 7 and a sensor group 4, setting the rotating speed of a rotating shaft 9 and the aging time of the asphalt on a control panel 11, and performing an asphalt aging test to obtain the complex shear modulus G of the asphalt with different aging times*Storage modulus G 'and loss modulus G', and then according to the complex shear modulus G of the asphalt with different aging time*Calculating the change rate upsilon of the complex shear modulus of the asphalt by the storage modulus G' and the loss modulus G ″*The change rate upsilon ' of the storage modulus and the change rate upsilon ' of the loss modulus, and then according to the change rate upsilon ' of the complex shear modulus of the asphalt*And the rate of change of storage modulus υ' and loss modulus υ "to evaluate the aging rate of the asphalt, wherein,
and
is an aging time of tn+1The complex shear modulus, storage modulus and loss modulus of the asphalt,
and
is an aging time of tnComplex shear, storage and loss moduli, t, of bitumenn+1＞tn。
In addition, in the test process, one or more parameters of temperature, oxygen flux, ultraviolet intensity and humidity can be changed, for example, constant conditions of oxygen flux, ultraviolet intensity and humidity are set, and the change rate of complex shear modulus, storage modulus and loss modulus under different aging temperature conditions can be obtained by changing different aging temperatures; or a plurality of test conditions are changed in combination, so that the change rates of the complex shear modulus, the storage modulus and the loss modulus of the asphalt under different combination aging conditions can be obtained.
Claims (7)
1. The ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test method is characterized by comprising an ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device and an ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device, wherein the ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device is based on the ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device and is characterized by comprising a control box (1), an environment box (3), a power assembly (2) arranged in the control box (1), an objective table (5) and a rotating shaft (9) arranged in the environment box (3), and a control panel (11) is arranged on the control box (1);
the control box (1) is positioned at the bottom of the environment box (3), an output shaft of the power assembly (2) is connected with the lower end of the rotating shaft (9), the objective table (5) is arranged on the rotating shaft (9), the objective table (5) is distributed in an inclined manner, a sample containing vessel (6) is arranged on the objective table (5), a plurality of ultraviolet lamps (7) and a sensor group (4) for detecting the temperature, humidity and oxygen concentration in the environment box (3) are arranged on the inner wall of the environment box (3), and an outlet of the air blowing system (10) is communicated with an air inlet of the environment box (3);
the control panel (11) is connected with the control end of the blowing system (10), the output end of the sensor group (4) and the control end of the power assembly (2);
the method comprises the following steps:
placing asphalt in a sample container (6), adjusting the temperature, humidity, oxygen flux and ultraviolet intensity in an environment box (3) by matching an air blowing system (10), an ultraviolet lamp (7) and a sensor group (4), setting the rotating speed of a rotating shaft (9) and the aging time of the asphalt on a control panel (11), and performing an asphalt aging test to obtain the complex shear modulus G of the asphalt with different aging times*Storage modulus G 'and loss modulus G', and then according to the complex shear modulus G of the asphalt with different aging time*Calculating the change rate upsilon of the complex shear modulus of the asphalt by the storage modulus G' and the loss modulus G ″*The change rate upsilon ' of the storage modulus and the change rate upsilon ' of the loss modulus, and then according to the change rate upsilon ' of the complex shear modulus of the asphalt*And the rate of change of storage modulus υ' and loss modulus υ "to evaluate the aging rate of the asphalt, wherein,
and
is an aging time of tn+1The complex shear modulus, storage modulus and loss modulus of the asphalt,
and
is an aging time of tnComplex shear, storage and loss moduli, t, of bitumenn+1＞tn。
2. The ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test method as claimed in claim 1, characterized in that the air blowing system (10) comprises a fan, a filtering system, a temperature adjusting device and a humidity regulator, and an outlet of the fan is communicated with an air inlet of the side wall of the environmental chamber (3) through the filtering system, the temperature adjusting device and the humidity adjusting device in sequence.
3. The ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test method according to claim 1, characterized in that the sensor group (4) comprises a temperature sensor, a humidity sensor and an oxygen sensor.
4. The ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test method according to claim 1, characterized in that a groove is arranged on the objective table (5), the sample vessel (6) is embedded in the groove, and the sample vessel (6) is of a barrel-shaped structure.
5. The ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test method according to claim 1, characterized by further comprising a protective housing (8), wherein the ultraviolet lamp (7) is located inside the protective housing (8).
6. The UV radiation-oxygen-temperature-humidity coupled asphalt aging test method according to claim 1, characterized in that each UV lamp (7) is located on the top and side wall of the environmental chamber (3), respectively.
7. The ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test method according to claim 1, characterized in that the rotating shaft (9) can be lifted; the control panel (11) is a touch screen display.
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| CN201810813006.9A CN108956438B (en) | 2018-07-23 | 2018-07-23 | Ultraviolet radiation-oxygen-temperature-humidity coupled asphalt aging test device and method |
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