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Integrated asphaltic mixture performance detection device

A technology of asphalt mixture and detection device, which is applied in the direction of testing material strength by applying stable shear force and testing material strength by applying stable tension/pressure, which can solve the problems of complex operation, influence of test results, and few applications

Inactive Publication Date: 2015-02-18
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Triaxial test: Calculate the shear strength of the mixture by measuring the cohesive force and internal friction angle of the mixture, but this test is complicated and less used
The accuracy of this method is good, but the aggregate with large particle size has a great influence on the test results, so this method is rarely used
[0007] Rotary shear test: This test is to install a system on the rotary compactor to measure the shear stress during the compaction of asphalt mixture. Due to the expensive equipment, it is not widely used at present
[0008] Uniaxial penetration test: The loading pressure head of the tester is much smaller than that of the specimen. During the loading process, the influence of lateral constraints is fully considered, but the shear performance of the specimen under multi-angle stress cannot be measured
[0009] The inventor found in the research and development process that the above-mentioned several detection tests all have the following problems: they can only measure the horizontal shear performance and vertical shear performance of the specimen, and the road surface is not only affected by horizontal and vertical forces in actual conditions , is also subjected to other forces in various angles, not only pressure or tension but also shear force, and its function is single, only one performance can be detected, and different performances can only be tested separately with different instruments, so A simple, economical and integrated testing device is needed to evaluate the properties of asphalt mixture in terms of tensile, compressive and shear resistance at various angles

Method used

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  • Integrated asphaltic mixture performance detection device
  • Integrated asphaltic mixture performance detection device
  • Integrated asphaltic mixture performance detection device

Examples

Experimental program
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Embodiment 1

[0026] see figure 1 , the integrated asphalt mixture performance detection device in this embodiment consists of a base 1, a lower fastening mechanism 2, a rotary loading mechanism 3, a strain gauge 4, an upper fastening mechanism 5, a load sensor 6, a bracket 7, and a hydraulic cylinder 8 , a hydraulic controller 9, a computer 10, and a data acquisition unit 11 are connected to form.

[0027] A lower fastening mechanism 2 is fixedly connected with a threaded fastener on the base 1, see figure 2 and 3 , the lower fastening mechanism 2 is composed of the lower fixing seat 2-1, the lower limit rod 2-2 and the lower limit protrusion 2-3. The lower fixing seat 2-1 is fixed on the base 1 by a threaded fastener, and the lower fixing The upper end of the seat 2-1 is arc-shaped, and the two sides of the lower fixing seat 2-1 are respectively fixed with a lower limit rod 2-2 with bolts, and the upper inner side of the two lower limit rods 2-2 is provided with a lower limit protrusio...

Embodiment 2

[0034] In this embodiment, hooks are provided at both ends of the right side of the left loading tray 3-1, snap rings are provided at both ends of the left side of the right loading tray 3-4, and the left loading tray 3-1 and the right loading tray 3-4 4 are connected with snap rings by snap hooks to form a disc. The disk surfaces of the left loading disk 3-1 and the right loading disk 3-4 can also be set as draw-in grooves on the same circumference along the edge, and the lower limit protrusion 2-3 is just stuck in the draw-in groove of the left loading disk 3-1, and the upper limit The position protrusion 5-3 is just stuck in the slot of the right loading plate 3-4, and the left loading plate 3-1 and the right loading plate 3-4 can be fastened by tightening the bolts to prevent them from rotating under pressure and ensure the detection The results are reliable. The other components and their connections are the same as in Embodiment 1.

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Abstract

The invention relates to an integrated asphaltic mixture performance detection device. A rotatable loading mechanism is adopted, and a test piece is placed at the center of the rotatable loading mechanism, when forces at different angles are exerted, performances such as the tensile resistance, compressive resistance, tension shear resistance and press shear resistance of the test piece can be detected through the deformation of a load sensor and a strain disc, the rotary angles of a left loading disc and a right loading disc can be adjusted to test performances of the test piece at different angles, so as to test the influence of loads at different angles on the test piece.

Description

technical field [0001] The invention belongs to the technical field of performance detection of asphalt pavement in highway engineering, and in particular relates to a detection method and device for the tensile, compressive and multi-angle shear resistance performance of asphalt mixture. Background technique [0002] With the continuous development of the road industry, the total mileage of my country's roads has continued to increase, and the quality level has also continued to improve, and more and more attention has been paid to the disease of asphalt pavement. On some asphalt pavement with heavy traffic, especially in high temperature in summer, it is more likely to have rutting, wrapping, passing and other diseases, which will reduce the strength of the pavement. The occurrence of these diseases is not only due to the influence of external environmental factors, but also includes the load from the vehicle. The direction of this force is not only perpendicular to the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12G01N3/10G01N3/24
Inventor 裴建中任仲山张久鹏李彦伟石鑫
Owner CHANGAN UNIV