Asphalt concrete disc test device
By designing an asphalt concrete disc test device including a lower test barrel, an upper test ring and a manual pressure pump, the existing device has solved the problem of excessive power and lack of exhaust devices and unstable installation of deformation measurement devices when loading water pressure, and the accuracy of test results and the avoidance of pollution are achieved.
Patent Information
- Application Number
- CN202421673192.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The existing asphalt concrete disc test device has too much power when loaded by water pressure, which may cause rapid deformation and damage of the test piece; the lack of exhaust devices leads to inaccurate test results; the installation of the deformation measurement device is unstable, affecting the measurement accuracy; the test pollution is serious and difficult to clean.
A bituminous concrete disc test device including a lower test barrel, an upper test ring and a manual pressure pump was designed, and an exhaust hole and a stable measurement system were added. The sealed water bladder was used for sealing, and pressure regulation was achieved by combining a high-precision pressure gauge and a manual pressure pump.
The accuracy of the test results is improved, contamination is avoided through simple and convenient sealing, and the fine regulation of test pressure is achieved, ensuring the reliability of the test results.
Smart Images
Figure CN222994268U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of concrete testing, and particularly relates to an asphalt concrete disc test device. Background Art
[0002] Hydraulic asphalt concrete has a very strong ability to adapt to deformation. At present, hydraulic asphalt concrete is highly recommended in China as an impervious body. Due to the excellent flexible deformation adaptability and impervious performance of the asphalt concrete face slab, attempts have been continuously made at home and abroad to use it as an impervious type, especially for pumped storage power stations with harsh operating conditions. Now, design institutes recommend arranging pumped storage power stations in the form of asphalt concrete imperviousness for the entire reservoir basin.
[0003] The asphalt concrete disc test is used to measure the deflection at the center of the disc and the deflection-span ratio of asphalt concrete under certain water pressure conditions, and is applicable to asphalt concrete for the impervious layer of the face slab. There is no clear requirement for the water pressure application equipment in the test device in the existing test specifications. Most test devices use plunger pumps, booster pumps, and air pressure pumps to load the test water pressure. However, the above-mentioned pressurizing devices have relatively large powers for this test, and there is a possibility of instantaneously loading to high pressure and causing the test piece to deform and break quickly, which is quite different from the form of long-term deformation of asphalt concrete under low pressure in the actual field project, not meeting the test requirements; there is no exhaust device reserved in the existing test devices, and it is impossible to effectively exhaust air during the placement of the test piece and the test preparation stage, which is likely to have an adverse impact on the test results; most of the deformation measurement devices in the existing test devices use magnetic bases with digital display dial indicators or displacement sensors, but it is difficult to ensure that the deformation measurement device is perpendicular to the deformation surface of the specimen when manually erecting the acquisition device, which is likely to cause the measured deformation to be distorted, thus affecting the accuracy of the test results. Moreover, in the existing test, asphalt mastic is used to seal both sides of the test piece and the test device, resulting in large test pollution and being difficult to clean up, which is likely to affect subsequent tests. Summary of the Utility Model
[0004] The purpose of the present utility model is to solve the above problems and propose an asphalt concrete disc test device.
[0005] To achieve the above purpose, this application adopts the following technical solutions:
[0006] An asphalt concrete disc test device, including a lower test barrel, an upper test ring, and a manual pressure pump. A test base is fixedly installed at the bottom of the lower test barrel. The lower test barrel and the upper test ring are fixedly connected by a plurality of fastening bolts. A plurality of dial indicator positioning rods are fixedly installed on the outer wall of the upper test ring, and dial indicators are fixedly installed on the dial indicator positioning rods. An exhaust hole is opened on one side of the top of the lower test barrel, and a sealing screw is installed in the corresponding exhaust hole. A sealing water bag is also installed on the top of the lower test barrel;
[0007] The output end of the manual pressure pump is provided with a test pressure pipe and a sealed water pipe. One end of the test pressure pipe is fixedly communicated with the bottom of the lower test barrel, and one end of the sealed water pipe is fixedly communicated with the sealed water bag. A test pressure pipe valve is arranged on the test pressure pipe, and a sealed water pipe valve is arranged on the sealed water pipe. The output end of the manual pressure pump is also provided with a high-precision pressure gauge, and the test pressure pipe valve and the sealed water pipe valve are respectively located on both sides of the high-precision pressure gauge.
[0008] Preferably, a ring of annular wing plates are correspondingly arranged on the outer side of the top of the lower test barrel and the outer side of the bottom of the upper test ring, and the fastening bolts are arranged on the annular wing plates.
[0009] Preferably, a ring of variable cross-section annular tracks are arranged on the outer side of the middle of the upper test ring, and the dial indicator positioning rod is fixedly installed on the annular track through bolts.
[0010] Preferably, the sealed water bag is of a circular tube structure, and a quick-connector type water injection port is arranged on one side of the sealed water bag.
[0011] Preferably, the test base is composed of four symmetrically arranged square tubes, and the four square tubes are respectively installed at the four diagonal positions at the bottom of the lower test barrel.
[0012] Compared with the prior art, the present application provides an asphalt concrete disc test device, which has the following beneficial effects:
[0013] 1. The asphalt concrete disc test device improves the accuracy of test results by increasing the exhaust holes and stabilizing the measurement system.
[0014] 2. The asphalt concrete disc test device seals the test specimen by combining the fastening bolts with the water-filled sealed water bag, which is simpler, more convenient and pollution-free compared with the original asphalt mastic seal.
[0015] 3. The asphalt concrete disc test device realizes the manual regulation of a small test pressure by combining the high-precision pressure gauge with the manual pressure pump. Description of the Drawings
[0016] Figure 1 is a front view structural schematic diagram of the asphalt concrete disc test device proposed by the present application;
[0017] Figure 2 is a top view structural schematic diagram of the asphalt concrete disc test device proposed by the present application.
[0018] In the figure: 1. Lower test bucket; 2. Upper test ring; 3. Test base; 4. Fastening bolt; 5. Dial indicator positioning rod; 6. Dial indicator; 7. Sealing water bag; 8. Sealing screw; 9. Test pressure pipe; 10. Test pressure pipe valve; 11. Sealing water pipe; 12. Sealing water pipe valve; 13. High-precision pressure gauge; 14. Manual pressure pump. Specific implementation mode
[0019] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.
[0020] Refer to Figure 1-2 , an asphalt concrete disc test device, including a lower test bucket 1, an upper test ring 2 and a manual pressure pump 14. The bottom of the lower test bucket 1 is fixedly provided with a test base 3. The lower test bucket 1 and the upper test ring 2 are fixedly connected by a plurality of fastening bolts 4. A plurality of dial indicator positioning rods 5 are fixedly arranged on the outer wall of the upper test ring 2. There are a plurality of dial indicator positioning rods 5. According to the different deformation points to be measured, the length parallel to the specimen section can be arbitrarily processed to realize the arbitrary adjustment of the fixed holes of the dial indicator 6. A dial indicator 6 is fixedly arranged on the dial indicator positioning rod 5. An exhaust hole is opened on one side of the top of the lower test bucket 1, and a sealing screw 8 is installed in the corresponding exhaust hole. A sealing water bag 7 is also arranged on the top of the lower test bucket 1;
[0021] The output end of the manual pressure pump 14 is provided with a test pressure pipe 9 and a sealing water pipe 11. One end of the test pressure pipe 9 is fixedly communicated with the bottom of the lower test bucket 1. There is a water injection hole in the middle of the bottom of the lower test bucket 1. A quick connector is welded outside the water injection hole and can be communicated with the test pressure pipe 9. One end of the sealing water pipe 11 is fixedly communicated with the sealing water bag 7. A test pressure pipe valve 10 is arranged on the test pressure pipe 9, and a sealing water pipe valve 12 is arranged on the sealing water pipe 11. The output end of the manual pressure pump 14 is also provided with a high-precision pressure gauge 13. The accuracy of the high-precision pressure gauge 13 should not be greater than 0.25 level, the range is 0 - 0.25 MPa, and the minimum scale value is not greater than 0.001 MPa. The test pressure pipe valve 10 and the sealing water pipe valve 12 are respectively located on both sides of the high-precision pressure gauge 13 and can be individually opened and closed to display the actual pressure of the corresponding water pipe on the high-precision pressure gauge 13.
[0022] A ring-shaped wing plate is correspondingly arranged on the outer side of the top of the lower test bucket 1 and the outer side of the bottom of the upper test ring 2, and the fastening bolt 4 is arranged on the ring-shaped wing plate.
[0023] A variable cross-section annular track is arranged on the outer side of the middle part of the upper test ring 2, and the dial indicator positioning rod 5 is fixedly installed on the annular track through bolts.
[0024] The sealing water bag 7 is in a circular tube structure, and a quick-connector type water injection port is arranged on one side of the sealing water bag, through which it can be communicated with the sealing water pipe 11.
[0025] The test base 3 is composed of four symmetrically arranged square pipes, and the four square pipes are respectively installed at the four diagonal positions at the bottom of the lower test barrel 1.
[0026] Now, the operation principle of the present utility model is described as follows:
[0027] When this application is used, first prepare an asphalt disc specimen that meets the requirements of the test specification. Connect the test pressure water pipe 9 to the quick connector outside the water injection hole of the lower test barrel 1, and connect the sealing water pipe 11 to the quick connector on the side of the sealing water bag 7 to ensure that all connections of the test device can be used normally. Adjust the laboratory ambient temperature to the required test temperature and keep it constant for at least 12 hours. Place the asphalt disc specimen on the lower test barrel 1, place the upper test ring 2 on the asphalt disc specimen, rotate the upper test ring 2 to align the hole positions on the annular wing plate of the upper test ring 2 with the hole positions on the annular wing plate of the lower test barrel 1, insert fastening bolts 4 into each hole position and tighten them symmetrically. Open the valve 12 of the sealing water pipe, close the valve 10 of the test pressure water pipe, start the manual pressure pump 14 to fill and pressurize the sealing water bag 7. When the pressure value of the high-precision pressure gauge 13 reaches 0.2 MPa, stop pressurizing, close the valve 12 of the sealing water pipe to complete the pressure locking of the sealing water bag 7, and the specimen sealing is completed. Open the valve 10 of the test pressure water pipe, unscrew the sealing screw 8, start the manual pressure pump 14 to fill and exhaust the lower test barrel 1 with water. When long flowing water flows out from the exhaust hole of the lower test barrel 1, stop pressurizing and tighten the sealing screw 8. The filling and exhaust of the lower test barrel 1 are completed. Install the corresponding dial gauge positioning rods 5 according to the number and position of the deformation points to be measured. Fix the dial gauge positioning rods 5 on the annular track in the middle of the upper test ring 2, and then install the dial gauges 6 so that the ejector rods of each dial gauge 6 are in contact with the upper surface of the specimen, and zero the values of each dial gauge 6. Start the manual pressure pump 14 to pressurize the specimen according to the requirements of the test specification and the design index. During the pressurizing process, record the readings of the dial gauges at each deformation point in real time until the specimen ruptures or water seeps out from the upper surface of the specimen, and the test ends. Calculate the central deflection and deflection-span ratio of the disc under the corresponding test water pressure conditions through the test data collected during the test process to obtain the test results.
[0028] The above is only the preferred specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application, according to the technical solution of this application and its application concept, makes equivalent substitutions or changes, and should be covered by the protection scope of this application.
Claims
1. An asphalt concrete disc test device, comprising a lower test barrel (1), an upper test ring (2) and a manual pressure pump (14), characterized in that: A test base (3) is fixedly mounted on the bottom of the lower test barrel (1); the lower test barrel (1) and the upper test ring (2) are fixedly connected via a plurality of fastening bolts (4); a plurality of micrometer positioning rods (5) are fixedly mounted on the outer wall of the upper test ring (2); a micrometer (6) is fixedly mounted on the micrometer positioning rods (5); an exhaust hole is opened on one side of the top of the lower test barrel (1), and a sealing screw (8) is installed in the corresponding exhaust hole; and a sealing water bag (7) is also installed on the top of the lower test barrel (1); A test pressurized water pipe (9) and a sealed water pipe (11) are installed at the output end of the manual pressure pump (14); one end of the test pressurized water pipe (9) is fixedly connected to the bottom of the lower test barrel (1); one end of the sealed water pipe (11) is fixedly connected to the sealed water bag (7); a test pressurized water pipe valve (10) is installed on the test pressurized water pipe (9); a sealed water pipe valve (12) is installed on the sealed water pipe (11); a high-precision pressure gauge (13) is also installed at the output end of the manual pressure pump (14); the test pressurized water pipe valve (10) and the sealed water pipe valve (12) are respectively located on both sides of the high-precision pressure gauge (13).
2. The asphalt concrete disc test device according to claim 1, characterized in that: A circle of annular wing plates are correspondingly arranged on the outer side of the top of the lower test barrel (1) and the outer side of the bottom of the upper test ring (2), and the fastening bolts (4) are installed on the annular wing plates.
3. The asphalt concrete disc test device according to claim 1, characterized in that: A circle of variable cross-section annular track is arranged on the outer side of the middle part of the upper test ring (2), and the micrometer positioning rod (5) is fixedly mounted on the annular track by means of bolts.
4. The asphalt concrete disc test device according to claim 1, characterized in that: The sealed water bag (7) is a circular tubular structure, and a quick-connector type water injection port is provided on one side of the sealed water bag (7).
5. The asphalt concrete disc test device according to claim 1, characterized in that: The test base (3) is composed of four symmetrically arranged square tubes, which are respectively installed at four diagonal positions on the bottom of the lower test barrel (1).