Tester and testing method for workability index of bituminous mixture

An asphalt mixture and tester technology, which is applied to instruments, flow characteristics, measuring devices, etc., can solve the problems of high manufacturing cost, unfavorable promotion and application, complicated design, etc., and achieves low manufacturing cost, wide applicability, and simple structure. Effect

Active Publication Date: 2013-10-09
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the testing and evaluation of the workability of asphalt mixtures abroad has made great progress, most of the current research in China is still focused on the viscosity test of asphalt, and there are very few existing ones that can pass the workability index of asphalt mixtures. Instruments for directly evaluating the workability of asphalt mixtures, such as Chinese patent CN101251529A, are not conducive to popularization and application because of their complex design and high manufacturing costs

Method used

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  • Tester and testing method for workability index of bituminous mixture
  • Tester and testing method for workability index of bituminous mixture
  • Tester and testing method for workability index of bituminous mixture

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 , figure 2 with image 3 As shown, the asphalt mixture and workability index tester of this embodiment includes a material bucket 1, a stirring shaft 5 and a torque wrench 7, the top of the material bucket 1 is provided with a bung 2, and the bung 2 is provided with a feeding port 4. The stirring shaft 5 is rotatably connected to the barrel cover 2 through the bearing 3, the upper end of the stirring shaft 5 is connected to the torque wrench 7 through the conversion joint 8, and the lower end of the stirring shaft 5 passes through the barrel cover 2 and extends into the barrel 1 A stirring blade 6 is installed at the lower end of the stirring shaft 5; the torque wrench 7 is a digital torque wrench or a pointer torque wrench.

[0034] In this embodiment, the bearing 3 is an open deep groove ball bearing. The inner diameter of the bearing 3 is 20mm, and the outer diameter of the bearing 3 is 52mm. The conversion joint 8 is an inner hexagon sleeve joi...

Embodiment 2

[0043] The asphalt mixture workability index tester of this embodiment is the same as that of Embodiment 1.

[0044] The method for testing the workability index of the asphalt mixture by using the asphalt mixture workability index tester of this embodiment is the same as in Example 1, and the difference is that the asphalt mixture is AC-13 type SBS improved permanent asphalt mixture.

[0045] The workability index K data of the asphalt mixture measured by the asphalt mixture workability index tester in this embodiment is shown in Table 1.

[0046] Table 1 Test results of workability index K of the asphalt mixture of Example 1 and Example 2 of the present invention

[0047]

[0048] It can be seen from Table 1 that the workability index of the AC-13 base asphalt mixture measured in Example 1 and the workability index of the AC-13 SBS modified asphalt mixture measured in Example 2 all increase with temperature. and under the same test temperature and test conditions, the w...

Embodiment 3

[0050] The asphalt mixture workability index tester of this example is the same as that of Example 1, except that the inner diameter of the bearing 3 is 25 mm, and the outer diameter of the bearing 3 is 72 mm. The inner diameter of the barrel 1 is 300mm, and the depth of the barrel 1 is 300mm. The number of the stirring blades 6 is three, and the three stirring blades 6 are equidistantly arranged along the axial direction of the stirring shaft 5, and the distance between two adjacent stirring blades 6 is 50 mm. The shape of the stirring blade 6 is cuboid, the length of the stirring blade 6 is 100 mm, the width is 40 mm, and the thickness is 5 mm. The distance h between the bottom end of the stirring blade near the bottom of the bucket 1 and the bottom of the bucket 1 among the three stirring blades 6 is 50 mm.

[0051] The method for testing the workability index of the asphalt mixture by using the asphalt mixture workability index tester of this embodiment may further compri...

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Abstract

The invention discloses a tester for a workability index of a bituminous mixture. The tester comprises a charging basket, a mixing shaft and a torque wrench, wherein a barrel cover is arranged on the top of the charging basket; a feeding hole is formed in the barrel cover; the mixing shaft is rotationally connected with the barrel cover through a bearing; the upper end of the mixing shaft is connected with the torque wrench through a conversion joint; the lower end of the mixing shaft penetrates through the barrel cover and stretches into the charging basket; a mixing blade is arranged at the lower end of the mixing shaft; the torque wrench is a digital display type torque wrench or a pointer type torque wrench. The invention also discloses a method for testing the workability index of the bituminous mixture by utilizing the tester. The method comprises the following steps: 1, adding the bituminous mixture into the charging basket; 2, calibrating the torque wrench; 3, rotating the torque wrench to obtain a torque value; and 4, calculating to obtain the workability index of the bituminous mixture by utilizing the torque value. The tester is novel and reasonable in design, wide in application range, good in using effect, high in actionability and convenient to popularize.

Description

technical field [0001] The invention belongs to the technical field of workability index test of asphalt mixture, and in particular relates to a workability index tester and a test method of asphalt mixture. Background technique [0002] The workability of asphalt mixture is the basic characteristic of asphalt mixture mixing, paving and compaction performance, and has a significant impact on the production temperature and construction quality of asphalt mixture. The poor workability of asphalt mixture will seriously affect the compaction performance of asphalt pavement, and then affect the construction quality of asphalt pavement. [0003] At present, the research on the workability of asphalt mixture at home and abroad mainly focuses on its testing and evaluation methods. Since there is no unified standard for the test and evaluation of asphalt mixture workability so far, most studies have used asphalt viscosity test, Marshall compaction test and Superpave rotary compactio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/14
Inventor 刘红瑛阮妨王春汪海年
Owner CHANGAN UNIV
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