Asphalt mixture anti-fatigue performance test device
A technology of asphalt mixture and testing device, which is applied in the direction of measuring device, using repetitive force/pulse force to test the strength of materials, analyzing materials, etc. issues such as reduced performance and durability
Active Publication Date: 2018-09-14
SHANXI PROVINCIAL RES INST OF COMM +1
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Problems solved by technology
When the pavement load is repeated for more than a certain number of times, cracks and other diseases will appear, and the generation of fatigue cracks will lead to a series of diseases, such as water infiltration, potholes, peeling, loosening, etc., which will lead to the comfort and durability of the road surface. Reduced performance, increased maintenance times and maintenance costs for pavement maintenance
Method used
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Embodiment 1
[0032]Prepare the test piece by rotary compaction molding, or directly drill a test piece with a diameter of 150mm from the pavement structure, cut parallel to both ends of the cylinder axis, cut off the two ends, and cut to a height of 38mm; The two ends of the body diameter are parallel and symmetrically cut, so that the width of the test piece is 75mm, and the size of the standard test piece is 150mm long, 75mm wide, and 38mm high. The baffle plate 11 restricts the sliding block 3 on the left side, the draw-in groove 10 and the baffle plate 11 on the right restrict the sliding block 3 on the right side, and the upper surface of the sliding block 3 is evenly coated with epoxy glue, and the asphalt mixture 4 to be tested is bonded on both sides. block the sliding block 3, maintain for a certain period of time, adjust the temperature of the environment box 9 to the test temperature, place the asphalt mixture 4 to be tested in the environment box 9, and keep it warm for 2 to 4 h...
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The invention belongs to the technical field of pavement material performance test, and relates to an asphalt mixture fatigue resistance testing apparatus. The apparatus comprises a box body, a vertical pressing device, a displacement sensor, a first sliding block, a second sliding block and an external computer; the first sliding block and the second sliding block are laid on the box body in parallel and can freely slide on the box body; the displacement sensor is placed between the first sliding block and the second sliding block; the upper surface of the first sliding block, the induction head of the displacement sensor and the upper surface of the second sliding block are positioned in the same horizontal plane; the vertical pressing device is placed over an asphalt mixture to be tested and applies a vertical pressure to the asphalt mixture to be tested; and the vertical pressing device and the displacement sensor are respectively connected with the external computer. The asphalt mixture fatigue resistance testing apparatus can truly simulate the complex stress bearing state of the asphalt mixture in a pavement structure.
Description
technical field [0001] The invention belongs to the technical field of performance testing of pavement materials, and relates to an anti-fatigue performance testing device, in particular to an asphalt mixture anti-fatigue performance testing device. Background technique [0002] During the use of asphalt mixture pavement, it has been subjected to the combined effects of vehicle load and climate for a long time, and the pavement is under constant changes in strain and stress for a long time. Since asphalt mixture is an elastoplastic material, its elastic properties cannot make the pavement structural strength All recovery will only continue to decline under the action of plastic properties. When the pavement load is repeated for more than a certain number of times, cracks and other diseases will appear, and the generation of fatigue cracks will lead to a series of diseases, such as water infiltration, potholes, peeling, loosening, etc., which will lead to the comfort and dura...
Claims
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IPC IPC(8): G01N3/36G01N3/02
CPCG01N3/02G01N3/36
Inventor 吴喜荣刘少文张艳聪刘志胜彭刚
Owner SHANXI PROVINCIAL RES INST OF COMM