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Sandwich test piece forming device capable of accurately controlling asphalt film thickness

A technology for precise control of asphalt film thickness, applied in the preparation of test samples, etc., can solve the problems of broken aggregate powder, aggregate surface texture easily damaged, difficult to precisely control asphalt film thickness, etc., and achieve accurate control of molding temperature. Effect

Active Publication Date: 2019-10-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the thickness of the asphalt film is difficult to be accurately controlled during the forming test of the existing aggregate-asphalt-aggregate sandwich test piece, and at the same time, the surface texture of the aggregate is easily damaged, resulting in broken aggregate powder, and a new method is proposed. Sandwich specimen forming device that can precisely control the thickness of asphalt film

Method used

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  • Sandwich test piece forming device capable of accurately controlling asphalt film thickness
  • Sandwich test piece forming device capable of accurately controlling asphalt film thickness
  • Sandwich test piece forming device capable of accurately controlling asphalt film thickness

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine Figure 1 to Figure 9 Describe this embodiment, a sandwich test piece forming device that can precisely control the thickness of the asphalt film described in this embodiment includes a bracket 1, a temperature box 2, a central shaft 3, a coarse adjustment knob 4, a fine adjustment knob 5, and an upper test piece mounting sleeve 6 and the lower test piece mounting sleeve 7, the central axis 3 is set along the vertical direction, the coarse adjustment knob 4 and the fine adjustment knob 5 are screwed on the central axis 3 from top to bottom in turn, and the upper end of the coarse adjustment knob 4 is provided with a first limit Position ring 21, the lower end of the coarse adjustment knob 4 is provided with a second limit ring 22, the upper end of the fine adjustment knob 5 is provided with a third limit ring 23, and the lower end of the fine adjustment knob 5 is provided with a fourth limit ring 24 , the first limit ring 21, th...

specific Embodiment approach 2

[0023] Specific implementation mode two: combination Figure 1 to Figure 3 To illustrate this embodiment, the upper outer peripheral side wall of the central shaft 3 described in this embodiment is provided with a coarse thread 31, the inner peripheral side wall of the coarse adjustment knob 4 is screwed with the coarse thread 31, and the lower end outer peripheral side of the central shaft 3 The wall is provided with a fine thread 32, and the inner peripheral side wall of the fine-tuning knob 5 is screwed with the fine thread 32. Other compositions and connection methods are the same as those in Embodiment 1.

[0024] In this way, the coarse adjustment knob 4 can rotate around the central axis 3, and under the action of the coarse thread 31, the central axis 3 can move up and down relatively quickly; the fine adjustment knob 5 can rotate around the central axis 3, and under the action of the fine thread 32, the center Axis 3 achieves slower up and down movement.

specific Embodiment approach 3

[0025] Specific implementation mode three: combination Figure 1 to Figure 4 To illustrate this embodiment, two limiting blocks 231 are provided on the inner peripheral side wall of the third limiting ring 23 in this embodiment, and two limiting grooves 35 are provided on the outer peripheral side wall of the central shaft 3, Each limiting slot 35 is arranged along the height direction, and each limiting block 231 is correspondingly inserted into one limiting slot 35 . Other compositions and connection methods are the same as those in the second embodiment.

[0026] The limiting block 231 is designed in this way to be clamped in the limiting groove 35, so that the central shaft 3 can move up and down but cannot rotate.

[0027] In this embodiment, two limiting blocks 231 are arranged oppositely, and two limiting grooves 35 are arranged oppositely.

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Abstract

A sandwich test piece forming device capable of accurately controlling an asphalt film thickness relates to a forming test device. In a forming test process of an existing aggregate-asphalt-aggregatesandwich test piece, a thickness of an asphalt film is difficult to be precisely controlled, and an aggregate surface texture is easily destroyed so as to generate a crushed aggregate powder. The device of the invention aims at solving the above problems. The device comprises a support, a temperature box, a central shaft, a coarse adjustment knob, a fine adjustment knob, an upper test piece installation sleeve and a lower test piece installation sleeve. The central shaft is arranged in a vertical direction, and the central shaft is successively and rotatably provided with the coarse adjustmentknob and the fine adjustment knob from top to bottom. An upper end of the coarse adjustment knob is provided with a first limiting ring, and a lower end of the coarse adjustment knob is provided witha second limiting ring. The upper end of the fine adjustment knob is provided with a third limiting ring, and the lower end of the fine adjustment knob is provided with a fourth limiting ring. The lower end of the central shaft is provided with the upper test piece installation sleeve, and the lower test piece installation sleeve is arranged right below the upper test piece installation sleeve. Aspring is arranged at the lower end of an internal portion of the lower test piece installation sleeve. The device is used for sandwich test piece forming.

Description

technical field [0001] The invention relates to a forming test device, in particular to a sandwich test piece forming device which can precisely control the thickness of an asphalt film. Background technique [0002] Asphalt mixture is a commonly used material for roads, consisting of asphalt and aggregates, and asphalt is filled between two adjacent aggregates. The average thickness of the asphalt film is about 100,000, and the thickness of the asphalt film inside the asphalt mixture is uneven, ranging from a few nanometers to a few millimeters. The thickness of asphalt film obviously affects the local and overall mechanical properties of asphalt mixture. Therefore, in scientific research, it is often necessary to make sandwich specimens in the form of aggregate-asphalt-aggregate to study the influence of asphalt film thickness on the mechanical properties of asphalt mixture. , where the asphalt film thickness ranges mainly from 10 microns to 500 microns. At present, ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/36G01N1/44
CPCG01N1/28G01N1/36G01N1/44
Inventor 张超谭忆秋符永康邹晶晶曲元魁
Owner HARBIN INST OF TECH
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