CN215812317U

CN215812317U - Instrument for simulating aging of asphalt mixture under different natural states

Info

Publication number: CN215812317U
Application number: CN202121850061.9U
Authority: CN
Inventors: 王文杰; 刘田俊; 吕鹏; 要琦; 马春芳; 孙嘉良
Original assignee: Shanxi Luqiao Municipal Engineering Co ltd
Current assignee: Shanxi Luqiao Municipal Engineering Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-02-11
Anticipated expiration: 2031-08-10

Abstract

The utility model relates to an instrument for simulating the aging of asphalt mixture under different natural states, which comprises 4 boxes and bases, wherein the top ends of the first three boxes are provided with box covers, ultraviolet lamps are arranged below the boxes, the bases are welded below the boxes, a switch is arranged in front of the base of a first box, switches and temperature control dials are arranged in front of the bases of a second box and a third box, a water tank is arranged at the bottom in the second box, a heating pipe is arranged at the bottom of the water tank, a stainless steel reinforcing mesh is arranged in the middle, a water tank is arranged at the bottom in the third box, a freezing pipe is arranged at the bottom of the water tank, a stainless steel reinforcing mesh is arranged in the middle, a blower and a heating pipe are arranged in the fourth box, an air flow meter is arranged on the outer wall, an exhaust port is arranged in the middle of the rear side, the exhaust port is connected with an air delivery pipeline, an air injection valve is arranged on each box corresponding to the air delivery pipeline and connected with an air inlet on the corresponding box, the device is simple to operate, the influence of thermal oxidation aging on the asphalt is increased, the comprehensiveness of a simulation experiment is improved, and the difference of actual pavement aging is reduced.

Description

Instrument for simulating aging of asphalt mixture under different natural states

Technical Field

The utility model belongs to the technical field of asphalt performance testing, and particularly relates to an instrument for simulating the aging of an asphalt mixture in different natural states.

Background

The current research on asphalt aging mainly comprises laboratory aging simulation on asphalt to reflect the actual aging of the asphalt pavement to the maximum extent, and in order to better simulate the actual aging process of the asphalt pavement, the laboratory research mainly adopts aging forms such as thermal oxidation aging, photo-oxidation aging, water aging and the like; ultraviolet light aging, thermal oxygen aging, water damage are important causes of asphalt pavement aging, especially in high altitude areas where ultraviolet light is abundant.

The degree of asphalt aging is increased by the most adverse environment superposition combination of ultraviolet illumination, rainwater, oxygen, freeze thawing and the like, and is a non-negligible influence factor of asphalt aging; on the whole, the existing device for influencing the asphalt mixture by multi-state coupling of ultraviolet illumination, water, oxygen and the like can only observe one state at the same time, cannot simultaneously compare the combination conditions of multiple states, cannot research and control the aging of a single variable in different states, and has larger difference with the aging of an actual pavement.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides an instrument for simulating the aging of the asphalt mixture in different natural states, which can effectively simulate the aging condition of the asphalt mixture in different states mainly by combining three devices, has a control test in different states and a single control variable test in the test process, is beneficial to comprehensively analyzing the aging of the asphalt mixture, and reduces the difference with the actual pavement aging.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an instrument for simulating the aging of asphalt mixtures under different natural states comprises a first box body, a second box body, a third box body, a fourth box body and 3 bases, wherein the four box bodies are sequentially welded from left to right, a box cover is arranged at the top end of the first box body, ultraviolet lamps are arranged below the box cover and are uniformly distributed, the bases are welded below the first box body, a switch is arranged in front of the bases, the switches are 2, the left switch controls the ultraviolet lamps, the right switch controls an air injection valve, and the aging state of an asphalt mixture test piece under the action of sunlight and hot air can be simulated; a box cover is arranged at the top end of the second box body, ultraviolet lamps are installed below the box cover and are uniformly distributed, a water tank is arranged at the bottom in the box body, heat insulation plates are arranged on the periphery of the water tank, a heating pipe is arranged at the bottom of the water tank, a stainless steel reinforcing mesh is arranged in the middle of the water tank and is immersed in water for placing an asphalt mixture test piece, and the whole water tank acts like a constant temperature water tank; a base is welded below the second box body, heating equipment is arranged in the base and is connected with a heating pipe, a switch and 1 number of temperature display control dials are arranged in front of the base, the number of the switches is 2, a left switch controls an ultraviolet lamp, a right switch controls an air jet valve, and the temperature of water in the second box body is set by the digital display temperature control dials, so that the aging state of asphalt mixture in the conditions of high temperature, strong ultraviolet illumination, unsmooth water drainage after rainstorm on a road surface and the whole road surface being soaked in water can be simulated; the top end of the third box body is provided with a box cover, ultraviolet lamps are installed below the box cover and are uniformly distributed, a square water tank is arranged at the bottom inside the box body, a detachable sealing cover plate is arranged at the top end of the water tank, a freezing pipe is arranged at the bottom of the water tank, a stainless steel reinforcing mesh is arranged in the middle of the water tank and is immersed in water and used for placing asphalt mixture test pieces, a base is welded below the third box body, a refrigerator and a compressor are arranged in the base and are connected with the freezing pipe, 2 switches and 1 temperature display control dial plates are arranged in front of the base, the switches are provided with 2 switches for controlling the ultraviolet lamps, a right switch is provided for controlling an air injection valve, a digital display temperature control table is provided with freezing temperature, and the water-containing asphalt mixture test pieces are frozen through the refrigerator and the compressor; when the compressor stops working, 2 switches are simultaneously turned on, and under the conditions of ultraviolet illumination and hot air blowing, the aging state of the asphalt mixture test piece can be simulated during midday ice and snow melting and when the temperature rises; all establish the air inlet on the preceding three box back wall, the sliding door is established to fourth box right side wall, built-in air-blower and heating pipe, be used for the air heating, digital display air flow meter is established to the outer wall, the gas vent is established at fourth box rear side middle part, gas transmission pipeline is connected to the gas vent, gas transmission pipeline is in the preceding three box back wall outside, and correspond each box on the gas transmission pipeline and all establish an air-jet valve, the air inlet on corresponding the box is connected to every air-jet valve, the air-blower sends out the air that heats and can directly send to three box in, guarantee that air flow and temperature keep unanimous under the most unfavorable environmental condition of simulation for three box.

The number of the ultraviolet lamps is designed according to the requirement.

The fourth box is as long as the base and is larger than the first three boxes, a space is arranged behind the first three boxes, a cavity is formed by sealing, and the gas transmission pipeline is positioned in the cavity.

Compared with the prior art, the utility model has the following beneficial effects:

(1) the device is simple to operate, wide in manufacturing material and low in manufacturing cost;

(2) the influence of thermal oxidation aging on asphalt is increased, the comprehensiveness of a simulation experiment is improved, and the difference of the simulation experiment and the actual pavement aging is reduced;

(3) the three devices are used in a combined mode, and different combination modes can effectively simulate the ageing condition of the asphalt mixture in different states and in various states, so that the accuracy is improved.

Drawings

FIG. 1 is a view showing the structure of the apparatus of the present invention;

1. a first case; 2. a second case; 3. a third box body; 4. a fourth box body; 5. a base I; 6, a base II; 7, a base III; 8. an ultraviolet lamp; 9. a switch; 10. a water tank I; 11. a water tank II; 12. heating a tube; 13. a freezing pipe; 14. a temperature control dial is digitally displayed; 15. stainless steel reinforcing mesh sheets; 16. a digital display air flow meter; 17. a gas pipeline; 18. an air injection valve.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in figure 1, an instrument for simulating the aging of asphalt mixtures in different natural states comprises a first box body 1, a second box body 2, a third box body 3, a fourth box body 4, a base I5, a base II 6 and a base III 7, wherein the four box bodies are sequentially welded from left to right, a box cover is arranged on the top end of the

first box body

1, 3 ultraviolet lamps 8 with the wavelength of 365nm are installed below the box cover, the ultraviolet lamps are evenly distributed, the base I5 is welded at the lower end of the first box body 1, a switch 9 is arranged in front of the base 5, the switches are 2, the ultraviolet lamps 8 are controlled by a left switch, an air injection valve 18 is controlled by a right switch, the aging states of the asphalt mixtures under the action of sunlight and hot air can be simulated, namely, the environmental states of spring and autumn are simulated.

A box cover is arranged at the top end of the

second box body

2, 3 365nm ultraviolet lamps 8 are arranged below the box cover, the ultraviolet lamps 8 are uniformly distributed, a water tank I10 is arranged at the bottom in the box body, heat insulation plates are arranged around the water tank I10, a heating pipe 12 is arranged at the bottom of the water tank I, a stainless steel reinforcing mesh 15 is arranged in the middle in the horizontal direction and used for placing an asphalt mixture test piece, the stainless steel reinforcing mesh 15 is immersed in water, and the whole water tank acts like a constant temperature water tank; a base II 6 is welded below the second box body 2, heating equipment is arranged in the base II 6 and connected with a heating pipe 12, a switch 9 and a digital display temperature control dial 14 are arranged in front of the base II 6, the number of the switches is 2, a left switch controls an ultraviolet lamp 8, a right switch controls an air jet valve 18, the digital display temperature control dial 14 sets the temperature of water in the second box body 2, and the state that the whole pavement is soaked in the water, namely the state of the most unfavorable environment in summer, can be simulated by controlling the temperature of the water in a water tank and combining ultraviolet light and hot air, wherein the temperature of the water in the water tank is high, the ultraviolet light is strong, the water discharge is not smooth after the pavement rainfalls down;

the top end of a third box body 3 is provided with a box cover, 3 ultraviolet lamps 8 with 365nm are arranged below the box cover, the ultraviolet lamps 8 are uniformly distributed, the bottom of the box body is provided with a square water tank II 11, the top end of the water tank II 11 is provided with a detachable sealing cover plate, the middle part of the water tank II is horizontally provided with a stainless steel mesh sheet 15, the stainless steel mesh sheet 15 is immersed in water, the bottom of the box body is provided with a freezing pipe 13, the lower end of the third box body 3 is welded with a base III 7, a refrigerator and a compressor are arranged in the base III 7, the refrigerator and the compressor are connected with the freezing pipe 13, the front part of the base is provided with a switch 9 and a digital display temperature control dial 14, the switches are 2, the ultraviolet lamps 8 are controlled by a left switch, an air injection valve 18 is controlled by a right switch, a freezing temperature control meter 14 is arranged by a digital display temperature control meter, and a water-containing mixed asphalt sample is frozen by the refrigerator and the compressor; the refrigerating machine and the compressor are adopted for freezing, the refrigerating machine and the compressor are closed, ice begins to melt, and by combining ultraviolet light and hot air, the aging state of an asphalt mixture test piece when the temperature rises, namely the condition of the most adverse environment in winter, can be simulated in the midday ice and snow melting state under the condition that ultraviolet light and hot air are blown in.

The rear walls of the first three box bodies are provided with air inlets; a sliding door is arranged on the right side wall of the fourth box body 4, a blower and a heating pipe are arranged in the sliding door and used for heating air, and a digital display air flow meter 16 is arranged on the outer wall of the sliding door; fourth box 4 is the same with base length and is greater than preceding three box, there is the space at the back of the preceding three box, sealed cavity that forms, the gas vent is established at 4 rear side middle parts of fourth box, gas transmission pipeline 17 is connected to the gas vent, gas transmission pipeline 17 is outside through the three box back wall in the front, be located the cavity, and gas transmission pipeline 17 goes up and all establishes an air-jet valve 18 to each box, air-jet valve 18 connects the air inlet on the corresponding box, the air-blower sends out the air that has heated and can directly send three box in, guarantee that air flow and temperature keep unanimous under the most unfavorable environmental condition of simulation for three box.

The above embodiments are only preferred embodiments of the present invention, and do not limit the present invention, and it is obvious to those skilled in the art that equivalent structural changes made by the description and the drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An instrument for simulating the aging of asphalt mixtures in different natural states is characterized by comprising a first box body (1), a second box body (2), a third box body (3), a fourth box body (4), a base I (5), a base II (6) and a base III (7), wherein the four box bodies are sequentially welded from left to right, a box cover is arranged at the top end of the first box body (1), ultraviolet lamps (8) are installed below the box cover, the ultraviolet lamps (8) are uniformly distributed, the base I (5) is welded at the lower end of the first box body (1), a switch (9) is arranged in front of the base I (5), 2 switches are arranged, the ultraviolet lamps (8) are controlled by the left switch, and an air injection valve (18) is controlled by the right switch;

a box cover is arranged at the top end of the second box body (2), ultraviolet lamps (8) are installed below the box cover, the ultraviolet lamps (8) are uniformly distributed, a water tank I (10) is arranged at the bottom, heat insulation plates are arranged on the periphery of the water tank I (10), a heating pipe (12) is arranged at the bottom of the water tank I (10), a stainless steel reinforcing steel bar net piece (15) is arranged above the heating pipe (12) and used for placing an asphalt mixture test piece, the stainless steel reinforcing steel bar net piece (15) is immersed in water, and the whole water tank acts like a constant temperature water tank; a base II (6) is welded at the lower end of the second box body (2), heating equipment is arranged in the base II (6) and connected with a heating pipe (12), a switch (9) and a digital display temperature control dial plate (14) are arranged in front of the base II (6), 2 switches are arranged, a left switch controls an ultraviolet lamp (8), a right switch controls an air injection valve (18), and the digital display temperature control dial plate (14) sets the temperature of water in the second box body (2);

a box cover is arranged at the top end of a third box body (3), ultraviolet lamps (8) are installed below the box cover, the ultraviolet lamps (8) are uniformly distributed, a square water tank II (11) is arranged at the bottom, a detachable sealing cover plate is arranged at the top end of the water tank II (11), a stainless steel reinforcing mesh sheet (15) is arranged in the middle of the water tank II (11), the stainless steel reinforcing mesh sheet (15) is immersed in water, a freezing pipe (13) is arranged at the bottom of the water tank II (11), a base III (7) is welded at the lower end of the third box body (3), a refrigerator and a compressor are arranged in the base III (7), the refrigerator and the compressor are connected with the freezing pipe (13), a switch (9) and a digital display temperature control dial plate (14) are arranged in front of the base, 2 switches are arranged, the ultraviolet lamps (8) are controlled by a left switch, and an air injection valve (18) is controlled by a right switch;

the rear walls of the first three box bodies are provided with air inlets, the right side wall of the fourth box body (4) is provided with a sliding door, a blower and a heating pipe are arranged in the sliding door and used for heating air, and the outer wall of the sliding door is provided with a digital display air flow meter (16); the gas vent is established at fourth box (4) rear side middle part, and gas transmission pipeline (17) are connected to the gas vent, and gas transmission pipeline (17) are outside through three box back wall in the front to correspond on gas transmission pipeline (17) each box and all establish one air blast valve (18), air inlet on the corresponding box is connected in air blast valve (18).

2. The apparatus for simulating the aging of asphalt mixtures in different natural states as claimed in claim 1, wherein the number of said ultraviolet lamps (8) is designed as required.

3. The apparatus for simulating the aging of asphalt mixtures in different natural states as claimed in claim 1, wherein the fourth box (4) has the same length as the base and is longer than the first three boxes, the space is formed behind the first three boxes, a cavity is formed by sealing, and the gas transmission pipeline is located in the cavity.