CN112684157A - Asphalt pavement adhesive layer performance testing device - Google Patents
Asphalt pavement adhesive layer performance testing device Download PDFInfo
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- CN112684157A CN112684157A CN202011375583.8A CN202011375583A CN112684157A CN 112684157 A CN112684157 A CN 112684157A CN 202011375583 A CN202011375583 A CN 202011375583A CN 112684157 A CN112684157 A CN 112684157A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention provides a device for testing the performance of an asphalt pavement adhesive layer. The device comprises an environment box, a spraying device, a rolling device, a lifting support, a data module and a control module. The environment box is a rectangular box body with an open upper end. The box bottom of environment case fixedly connected with forming die. The spraying device comprises a material conveying system and a spraying system. The rolling device comprises a rubber wheel, a balancing weight, a dowel bar, a braking device and a wheel frame. The spraying device, the rolling device, the lifting support and the data module are all electrically connected with the control module. The device makes the environment of test piece satisfy atress and temperature humidity situation under the road surface actual conditions the at utmost.
Description
Technical Field
The invention relates to the field of asphalt pavement damage analysis and test, in particular to an asphalt pavement adhesive layer performance testing device.
Background
The surface layer of the asphalt pavement is a structural layer which directly bears the repeated action of wheel load and the influence of natural factors. The asphalt pavement is constructed by layering and paving, and the layers can be bonded by using the binding oil, so that the integrity damage caused by insufficient bonding between the layers is prevented. The bond between the facing and the facing is important. The road surface can develop large horizontal shear stresses due to vehicle traction. The adhesive layer is located at the weak position of the pavement, and due to the thickness, the material and the like, the shear strength of the adhesive layer is often not enough to resist the shear stress born by the adhesive layer, so that the adhesive layer is easy to shear and damage.
However, the existing detection method cannot reflect the actual stress and failure mode of the adhesive layer, and cannot measure the failure mode of the corresponding surface layer combination in different temperature environments.
Disclosure of Invention
The invention aims to provide a device for testing the performance of an asphalt pavement adhesive layer, which aims to solve the problems in the prior art.
The technical scheme adopted for achieving the purpose of the invention is that the asphalt pavement adhesive layer performance testing device comprises an environment box, a spraying device, a rolling device, a lifting support, a data module and a control module.
The environment box is a rectangular box body with an open upper end. The box bottom of environment case fixedly connected with forming die. The forming die comprises a die body, an ear plate and a handle. The groove-shaped body is a U-shaped channel steel. The channel-shaped body comprises a web and two flanges. The flange of the die body is provided with an ear plate and a handle. The ear plate is provided with a mounting hole. The forming die is fixedly connected with the box bottom of the environment box through the ear plate.
The lifting support comprises two lifting upright columns and a sliding rail connected between the two lifting upright columns. And a sliding block is arranged on the sliding rail.
The spraying device comprises a material conveying system and a spraying system. The conveying system comprises a pressure pump and a material storage box. And the outlet of the pressure pump is communicated with the storage tank through a connecting pipe. And the pipeline of the connecting pipe is provided with an on-off valve. The spraying system comprises a pipeline and spray heads uniformly distributed on the pipeline. The pipeline is connected with the discharge hole of the storage box through a hose. And a flow regulating valve is arranged in the spray head. The spraying system is fixedly connected with the sliding block through the stabilizing frame.
The rolling device comprises a rubber wheel, a balancing weight, a dowel bar, a braking device and a wheel frame. The rubber wheel is movably arranged below the wheel frame. And a braking device is arranged on the inner side of the rubber wheel. The braking device has a tension sensor. The data module is electrically connected with the tension sensor. The wheel frame is fixedly connected with the sliding block. And a dowel bar is arranged at the top of the wheel frame. And a balancing weight is arranged above the dowel bar.
The spraying device, the rolling device, the lifting support and the data module are all electrically connected with the control module.
Further, the forming die is filled with an asphalt test piece. The asphalt test piece comprises a mixture upper layer, a viscous layer oil and a mixture lower layer which are sequentially arranged from top to bottom.
Further, the device also comprises a displacement testing device. The displacement testing device is a laser scanning measuring device.
Further, an electric heating piece is arranged on the inner wall of the environment box.
Further, a temperature and humidity sensor is arranged at the bottom of the environment box.
The technical effects of the invention are undoubted:
A. the environment of the test piece is made to meet the stress and temperature and humidity conditions of the road surface under the actual condition to the maximum extent;
B. the method can be used for the damage analysis test of the asphalt pavement under different material thickness combinations.
Drawings
FIG. 1 is a schematic structural diagram of a testing apparatus;
FIG. 2 is a schematic view of a spraying device;
FIG. 3 is a schematic view of a rolling device;
FIG. 4 is a schematic view of the lifting frame;
FIG. 5 is a schematic view of a mold structure;
fig. 6 is a schematic structural diagram of an asphalt test piece.
In the figure: the device comprises an environment box 1, a spraying device 2, a pipeline 201, a spray head 202, a rolling device 3, a rubber wheel 301, a balancing weight 302, a dowel bar 303, a braking device 304, a wheel frame 305, a forming die 4, a die body 401, an ear plate 402, a handle 403, an asphalt test piece 5, an upper mixture layer 501, a viscous layer oil 502, a lower mixture layer 503, a lifting support 6, a lifting upright 601, a sliding rail 602 and a sliding block 603.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
this example was used to measure the adhesion properties of a pavement overlay. The embodiment of the reference figure 1 discloses a bituminous paving adhesive layer capability test device, including environment case 1, sprinkler 2, rolling machine 3, lifting support 6, data module, displacement testing arrangement and control module.
The environment box 1 is a rectangular box body with an open upper end. The box bottom of environment case 1 is fixedly connected with forming die 4. The molding die 4 includes a die body 401, an ear plate 402, and a handle 403. The channel-shaped body 401 is a U-shaped channel steel. The channel-shaped body 401 comprises a web and two flanges. The flanges of the die body 401 are provided with ear plates 402 and handles 403. The ear plate 402 is provided with a mounting hole. The forming die 4 is fixedly connected with the bottom of the environmental chamber 1 through the ear plate 402.
The lifting support 6 comprises two lifting columns 601 and a sliding rail 602 connected between the two lifting columns 601. A slide block 603 is arranged on the pass slide rail 602.
The spraying device 2 comprises a material conveying system and a spraying system. The conveying system comprises a pressure pump and a material storage box. And the outlet of the pressure pump is communicated with the storage tank through a connecting pipe. And the pipeline of the connecting pipe is provided with an on-off valve. The spraying system comprises a pipeline 201 and spray heads 202 which are uniformly distributed on the pipeline 201. The pipeline 201 is connected with the discharge hole of the storage box through a hose. A flow regulating valve is arranged in the spray head 202. The spraying system is fixedly connected with the sliding block 603 through a stabilizing frame.
The rolling device 3 comprises a rubber wheel 301, a balancing weight 302, a dowel bar 303, a braking device 304 and a wheel frame 305. The rubber wheel 301 is movably arranged below the wheel frame 305. A braking device 304 is arranged on the inner side of the rubber wheel 301. The brake device 304 has a tension sensor. The wheel frame 305 is fixedly connected with the sliding block 603. The wheel frame 305 is provided with a dowel bar 303 at the top. A balancing weight 302 is arranged above the dowel bar 303.
The spraying device 2, the rolling device 3, the lifting support 6 and the data module are all electrically connected with the control module.
And an asphalt test piece 5 is filled in the forming die 4. The asphalt test piece 5 comprises an upper mixture layer 501, a viscous layer oil 502 and a lower mixture layer 503 which are sequentially arranged from top to bottom.
The displacement testing device is a laser scanning measuring device. The displacement sensor is used for monitoring the rutting depth change of the asphalt test piece and the relative displacement change and the shape change of the double-layer material. The tension sensor and the temperature and humidity sensor are electrically connected with the data module.
The control module is used for controlling each piece of equipment to run at a constant speed on the guide rail and to start and stop. The data module is used for collecting data of each sensor and calculating, and is matched with the control module to send out corresponding control instructions.
During operation, the maximum rutting depth, test temperature and wheel-grinding speed are set. After the arrangement is finished, the equipment starts to operate, the rut instrument automatically lifts the loading wheel, the test wheel automatically descends, after the test wheel contacts the center of the test piece, rolling is carried out for several times for automatic leveling, then a normal test is started, and the test is finished after the rut depth reaches 20 mm.
Example 2:
the main structure of the present embodiment is the same as that of embodiment 1, wherein the spraying device 2 simulates actual viscous layer oil construction on a construction site. The spraying device 2 moves forwards at a constant speed along the slide rail and uniformly sprays the viscous layer oil on the upper part of the lower layer 503 of the mixture. The rubber wheels 301 are laminated to simulate the real stress state of the road surface structure under the action of vehicle load. The rubber wheel 301 functions in two modes, rolling load testing and brake testing, and simulating the road surface condition.
Example 3:
the main structure of the present embodiment is the same as that of embodiment 1, wherein, in the test process, the environmental temperature can be controlled by the electric heating sheet. The experimental procedure was observed using the side. The main experiment modes comprise a loading experiment and a braking experiment, and the test process comprises a rolling mechanics experiment and a braking experiment.
Example 4:
the main structure of the embodiment is the same as that of embodiment 1, wherein, in the test process, a sticky layer oil spreading device is used for simulating rainfall and immersion test, and water is poured into a storage box and sprayed on the test piece through a spray head.
Example 5:
the main structure of this embodiment is the same as that of embodiment 1, wherein the displacement measuring device follows the wheel with a fixed distance and measures and calculates the depth change H ═ H on the surface of the test pieceijAnd (4) measuring range of section depth is-20 mm, depth resolution is 0.01mm, and scanning resolution is 300 points/line. The experimental control mode comprises two modes of controlling action times and destruction modes. The 'control action times' means the times of actually performing loading rolling or braking, including the overlapping action of two modes and the like, are preset by a control system. The 'destruction mode' is that the deformation observation result is utilized to determine the end of the control experiment, the target damage degree is determined and reached through the setting of the critical value, and the experiment is terminated, wherein the target damage degree index comprises the maximum depth value hmax＝MAX{HijAnd the length change value DeltaL of the test piece, the relative transverse displacement S of two layers is N (j) multiplied by 1mm, and N (j) is the number of effective scanning sections.
Claims (5)
1. The utility model provides a bituminous paving adhesive layer capability test device which characterized in that: the device comprises an environment box (1), a spraying device (2), a rolling device (3), a lifting bracket (6), a data module and a control module;
the environment box (1) is a rectangular box body with an open upper end; the box bottom of the environment box (1) is fixedly connected with a forming die (4); the molding die (4) comprises a die body (401), an ear plate (402) and a handle (403). The groove-shaped body (401) is a U-shaped channel steel; the channel-shaped body (401) comprises a web and two flanges; the flanges of the die body (401) are provided with ear plates (402) and handles (403); the ear plate (402) is provided with a mounting hole; the forming die (4) is fixedly connected with the box bottom of the environment box (1) through an ear plate (402);
the lifting support (6) comprises two lifting upright posts (601) and a sliding rail (602) connected between the two lifting upright posts (601); a sliding block (603) is arranged on the sliding rail (602);
the spraying device (2) comprises a material conveying system and a spraying system; the material conveying system comprises a pressure pump and a material storage box; the outlet of the pressure pump is communicated with the material storage box through a connecting pipe; the pipeline of the connecting pipe is provided with an on-off valve; the spraying system comprises a pipeline (201) and spray heads (202) which are uniformly distributed on the pipeline (201); the pipeline (201) is connected with a discharge hole of the storage box through a hose; a flow regulating valve is arranged in the spray head (202); the spraying system is fixedly connected with the sliding block (603) through a stabilizing frame;
the rolling device (3) comprises a rubber wheel (301), a balancing weight (302), a dowel bar (303), a braking device (304) and a wheel frame (305); the rubber wheel (301) is movably arranged below the wheel frame (305); a braking device (304) is arranged on the inner side of the rubber wheel (301); the braking device (304) has a tension sensor; the data module is electrically connected with the tension sensor; the wheel frame (305) is fixedly connected with the sliding block (603); the top of the wheel frame (305) is provided with a dowel bar (303); a balancing weight (302) is arranged above the dowel bar (303);
the spraying device (2), the rolling device (3), the lifting support (6) and the data module are all electrically connected with the control module.
2. The asphalt pavement bonding layer performance testing device according to claim 1, characterized in that: an asphalt test piece (5) is filled in the forming die (4); the asphalt test piece (5) comprises a mixture upper layer (501), a viscous layer oil (502) and a mixture lower layer (503) which are sequentially arranged from top to bottom.
3. The asphalt pavement bonding layer performance testing device according to claim 1 or 2, characterized in that: the device also comprises a displacement testing device; the displacement testing device is a laser scanning measuring device.
4. The asphalt pavement bonding layer performance testing device according to claim 1, characterized in that: and an electric heating sheet is arranged on the inner wall of the environment box (1).
5. The asphalt pavement bonding layer performance testing device according to claim 1 or 3, characterized in that: and a temperature and humidity sensor is arranged at the bottom of the environment box (1).
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| CN202011375583.8A CN112684157B (en) | 2020-11-30 | 2020-11-30 | Asphalt pavement adhesive layer performance testing device |
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| CN202011375583.8A CN112684157B (en) | 2020-11-30 | 2020-11-30 | Asphalt pavement adhesive layer performance testing device |
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| CN112684157A true CN112684157A (en) | 2021-04-20 |
| CN112684157B CN112684157B (en) | 2023-09-22 |
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