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Beam test piece forming device and forming method for asphalt mixture

A technology of asphalt mixture and forming device, which is applied in the field of road engineering asphalt mixture, can solve the problems of difficult forming of test pieces, stress concentration, and inability to vibrate and roll, and achieve the goals of improving accuracy, avoiding stress concentration, and improving forming efficiency Effect

Pending Publication Date: 2020-04-10
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the object of the present invention is to provide a beam test piece forming device and a forming method of an asphalt mixture. The forming device of the present invention can form beam test pieces of different heights (thicknesses) and widths without cutting. In the process of forming and manufacturing the asphalt mixture beam specimens in the existing experiments, the stress concentration caused by cutting the rutting plate, the vibration rolling that cannot completely simulate the road construction and the difficulty in forming the thick specimens have been solved, and the improvement has been improved. The accuracy of low-temperature cracking performance evaluation and fatigue performance verification test of asphalt mixture; at the same time, the operation is convenient, which improves the accuracy and repeatability of test results

Method used

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  • Beam test piece forming device and forming method for asphalt mixture
  • Beam test piece forming device and forming method for asphalt mixture
  • Beam test piece forming device and forming method for asphalt mixture

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Embodiment 1

[0038] refer to Figure 1-7 , a kind of asphalt mixture beam specimen forming device of the present invention comprises: test support 1, and described test support 1 is provided with lifting unit 2, mold 3 and vibrating unit 4 from bottom to top; Wherein, described lifting The bottom of the unit 2 is fixed on the test support 1, and the upper end of the lifting unit 2 is horizontally provided with a support plate 5, and the support plate 5 has a certain thickness; There are multiple groups of wheel grooves on the front and rear sides respectively, and rolling wheels 501 are arranged in the grooves of the rollers 304. The upper surface of the support plate 5 is provided with a plurality of shaft grooves corresponding to each group of wheel grooves. A fixed shaft 502 is installed in the shaft groove, and the rolling wheel 501 is sleeved on the fixed shaft 502; the lower surface of the bearing plate 5 has a semicircular rotating shaft 503; the upper end of the lifting unit 2 has ...

Embodiment 2

[0058] A beam test piece forming method of asphalt mixture, comprising the following steps:

[0059] Step 1. According to the beam specimen width required by the test, install partitions in the corresponding vertical grooves, and erect the corresponding mobile baffles on the partitions to form corresponding charging chambers; Formed asphalt mixture;

[0060] Step 2: Turn on the heating unit to heat the material to the temperature required for the test; turn on the vibration unit to vibrate and compact the asphalt mixture to be formed in the mold to form a uniform material to be pressed;

[0061] Step 3: Turn on the lifting unit so that the bracket supports the support plate to move upwards. When the rolling wheel touches the moving baffle, under the action of vibration, the rolling wheel and the support plate start to rotate back and forth to crush the moving baffle. Press; when the material on the moving baffle is pressed against the mold cover, the beam specimen is obtained...

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Abstract

The invention, which belongs to the technical field of road engineering asphalt mixtures, discloses a beam test piece forming device and forming method for an asphalt mixture. According to the invention, the structural design is adopted and the forming device can form beam test pieces with different heights and different widths, and cutting is not needed, so that problems that in the forming and manufacturing process of the asphalt mixture small beam test piece in the existing experiment, stress concentration is caused by cutting a track plate, vibration rolling compaction of pavement construction cannot be completely simulated, and the test piece with the large thickness is difficult to form are solved and the accuracy of asphalt mixture low-temperature cracking performance evaluation and fatigue performance verification tests is improved; and meanwhile, the operation is convenient, and the accuracy and repeatability of a test result are improved.

Description

technical field [0001] The invention belongs to the technical field of road engineering asphalt mixture, and in particular relates to a beam test piece forming device and a forming method of asphalt mixture. Background technique [0002] Asphalt pavement has the advantages of good driving comfort, short construction period, and convenient maintenance, and has become the main pavement structure type of high-grade highways in my country. However, during the use of asphalt pavement, low temperature cracking and fatigue damage are the main factors affecting its durability. Therefore, it is very important to evaluate the low temperature and fatigue performance of asphalt mixture. [0003] In the process of low-temperature cracking performance evaluation and fatigue performance verification of asphalt mixture, the wheel mill is often used to form asphalt mixture rutting slabs, and then the rutting slabs are cut into small beams for testing. This test method has the following defi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 李祖仲王梦梦陈华鑫刘慧杰陈唯希李凯周晓伟王晟沣董煜华敏
Owner CHANGAN UNIV
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