Asphalt mortar forming, measuring device and test method for dynamic shear parameters of asphalt mortar

A technology for asphalt mortar and parameter testing, which is applied in the direction of applying stable shear force to test the strength of materials and the preparation of test samples. It can solve the problems of affecting test results, inability to perform performance tests, and easy damage of asphalt mortar specimens. , to achieve the effect of economical operation, ensuring accuracy and reliability, and simple operation

Active Publication Date: 2018-04-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the asphalt mortar specimen produced by the existing molding method is easily damaged and affects the test results, and the existing measuring device and measurement method of the asphalt mortar specimen cannot perform performance testing in a high temperature environment Therefore, a kind of asphalt mortar forming, measuring device and test method for dynamic shear parameters of asphalt mortar are proposed

Method used

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  • Asphalt mortar forming, measuring device and test method for dynamic shear parameters of asphalt mortar
  • Asphalt mortar forming, measuring device and test method for dynamic shear parameters of asphalt mortar
  • Asphalt mortar forming, measuring device and test method for dynamic shear parameters of asphalt mortar

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specific Embodiment approach 1

[0050] The asphalt mortar molding device of the present embodiment, such as figure 1 As shown, its composition includes a guide rod 1, a test mold 3 and a base 4. One end of the test mold 3 is oppositely provided with a guide rod 1, and the other end is fitted with the base 4, and the guide rod 1, the test mold 3 and the base 4 coaxial setup; where,

[0051] The guide rod 1 includes a hand-held block 24, a connecting rod 25 and a compacting head 26, the hand-held block 24 and the compacting head 26 are respectively coaxially connected to the two ends of the connecting rod 25 to form an integrated structure, and the connecting rod 25 Outer wall sliding set real hammer 2;

[0052] The interior of the test mold 3 has a hollow compaction cavity 28, the two ends of the compaction cavity 28 communicate with the clamping grooves 27 respectively, and the compaction cavity 28 and the two clamping grooves 27 are arranged coaxially.

specific Embodiment approach 2

[0053] Different from Embodiment 1, in the asphalt mortar forming device of this embodiment, the hand-held block 24, the connecting rod 25 and the compacting head 26 are all cylindrical and made of metal materials; the diameters are 12mm, 6mm and 12mm, and the heights are 200mm, 355.5mm and 20mm respectively; wherein, the length of the connecting rod (25) is 374.5mm.

specific Embodiment approach 3

[0054] Different from Embodiment 1 or Embodiment 2, in the asphalt mortar molding device of this embodiment, the clamping groove 27 and the compaction cavity 28 of the test mold 3 are both cylindrical cavities; the internal diameter of the clamping groove 27 is 16 mm, and the depth The inner diameter of the compaction cavity 28 is 12mm, and the depth is 56mm; and the test mold 3 is made of metal material.

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Abstract

The invention relates to an asphalt mortar forming and measuring device and a test method for the dynamic shear parameter of the asphalt mortar, belonging to the field of testing the dynamic shear parameter of the asphalt mortar. Asphalt mortar specimens produced by existing molding methods are easily damaged, and the existing measuring devices and methods for asphalt mortar specimens cannot meet the requirements of high temperature performance testing. Asphalt mortar forming device, one end of the test mold (3) is oppositely provided with a guide rod (1), and the other end is matched with the base (4) for insertion. Asphalt mortar dynamic shear parameter testing device, a detachable fixture (9) and a fixture loading body (20) arranged opposite to each other are respectively installed in cooperation with a connection base (16). Asphalt mortar dynamic shear parameter testing method, preparing asphalt mortar specimen (19), performing inertia moment correction, zeroing, and geometric correction operations on the uninstalled specimen connection base (16), starting the DHR-II rheometer environment box for testing. The invention has the advantages of simple operation and accurate test results.

Description

technical field [0001] The present invention relates to calculation of effective asphalt content of asphalt mortar, development of small-size cylindrical asphalt mortar test piece forming test device, asphalt mortar dynamic shear parameter test test device and corresponding test method, in particular to a kind of asphalt mortar forming, Measuring device and its test method for dynamic shear parameters of asphalt mortar. Background technique [0002] Based on the multi-scale characteristics of asphalt mixture composition and the theory of cement dispersed phase, asphalt pavement materials can be divided into the following three characteristic components: the asphalt-aggregate interface at the micro scale; the asphalt mortar (including voids) at the meso scale ); asphalt mixture at the macro scale. Among them, the asphalt mortar, which is a characteristic component of the mesoscale, plays a bridge role in establishing the interaction relationship between the microscale and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/44G01N3/24B29C43/02
Inventor 董泽蛟龚湘兵刘志杨李红飞
Owner HARBIN INST OF TECH
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