Test piece preparation mould special for shearing test and preparation method thereof

A shear test and test piece technology, which is applied in the preparation of test samples, measuring devices, instruments, etc., can solve the problems of poor structure uniformity of the base layer and surface layer, affecting the accuracy of test results, loose and falling particles, etc., to achieve Satisfying integrity, moderate molding size, and satisfying the effect of uniformity

Inactive Publication Date: 2010-10-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that there is no mold specially used for forming the base layer and the surface layer in the shear test; in the forming method of the traditional rutting specimen forming mold, the limitation of the height of the test piece leads to the formation of the base layer and the surface layer structure. The uniformity is poor, and the size of the specimen formed by the rutting mold is large. After the specimen is cut, the grains of the base layer are loose and fall off seriously, resulting in a significant decrease in the strength of the base layer and the change of the shear failure form, which affects the accuracy of the test results. problem, and then provide a special specimen preparation mold for shear test and its preparation method

Method used

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  • Test piece preparation mould special for shearing test and preparation method thereof
  • Test piece preparation mould special for shearing test and preparation method thereof
  • Test piece preparation mould special for shearing test and preparation method thereof

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specific Embodiment approach 1

[0014] Specific implementation mode 1: Combination Figure 1 to Figure 4 The test piece preparation mold dedicated to the shear test of this embodiment is described, which includes a supporting base plate 2, two side plates 3, two first split pressure baffles 8 and two second split pressure baffles 9. The upper and lower ends of each side plate 3 are respectively provided with outer convex edges, the two side plates 3 arranged in parallel are vertically connected to the two ends of the supporting bottom plate 2, and the inner walls of the two side plates 3 are arranged oppositely Two pairs of vertical slots 4, two second split pressure baffles 9 are symmetrically arranged and inserted between the two side plates 3 through the slots 4, and the two first split pressure baffles 8 are respectively inserted Installed in the two pairs of slots 4 and located above the second split pressure baffle 9, the support bottom plate 2, two side plates 3, two first split pressure baffles 8 and t...

specific Embodiment approach 2

[0015] Specific implementation manner two: combination Figure 1 to Figure 3 The test piece preparation mold dedicated to the shear test of the present embodiment also includes at least four tie rods 6, which are horizontally and symmetrically arranged outside the two pairs of slots 4 of the two side plates 3 , The two side plates 3 are connected by a tie rod 6. The other components and connection relationships of this embodiment are the same as those of the first embodiment.

specific Embodiment approach 3

[0016] Specific implementation mode three: combination Figure 1 to Figure 3 To illustrate the sample preparation mold dedicated to the shear test of this embodiment, the net size of the cavity 10 is length L×width W×height H=150mm×150mm×190mm, and the first split pressure baffle 8 The height H1 is 75 mm, and the height H2 of the second split pressure baffle 9 is 115 mm. The other components and connection relationships of this embodiment are the same as those of the first or second embodiment.

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Abstract

The invention discloses a test piece preparation mould special for a shearing test and a preparation method thereof, and relates to the technical field of road inter-layer binding performance tests. The invention solves the problems that no special forming mould for preparing a test piece is available and in the conventional method, the uniformity of the structures at the middle base and the surface layer is poor, the strength of the cut base layer of the test piece is reduced and the accuracy of the test result is affected. Two parallel side plates in the mould are connected with the two ends of a supporting bottom plate; two pairs of slots are oppositely formed in the inner walls of the two side plates; split bearing baffles are symmetrically inserted between two bearing baffles through the slots; the method comprises the following steps of: 1, uniformly stirring broken stones, water and cement and pouring the mixture into a mould provided with a second split bearing baffle; 2, controlling the speed of a pressure head so that the distance between the pressure head and the upper end of the second split bearing baffle is 40 mm; 3, coating priming oil on the test piece and then standing for 24 hours; 4, after the priming oil penetrates, arranging a first split bearing baffle, sealing with the broken stone and placing the sealed first split bearing baffle on the test piece for 4 hours; 5, pressing and forming; and 6, demoulding and preserving. The test piece preparation mould is used for a shearing test for measuring the road interlayer binding performance.

Description

Technical field [0001] The invention relates to the technical field of road interlayer bonding performance testing, in particular to a test piece preparation mold specially used for shear test and a preparation method thereof. Background technique [0002] The problem of interlayer adhesion between asphalt pavement surface and base is a hot spot in the road industry in recent years. In the construction of asphalt pavement, structural measures such as permeable layer and lower sealing layer are adopted to enhance the adhesion between base and surface. ability. Studies have shown that good interlayer adhesion can effectively avoid road diseases such as interlayer slippage and prolong the service life of roads. Shear test is the most intuitive and effective method to determine and evaluate the bonding ability between layers. It provides a basis for the comparison and selection of road layer bonding ability for different road layer treatment measures, but it is not currently used fo...

Claims

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Application Information

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IPC IPC(8): G01N3/02G01N1/28
Inventor 冯德成赵含易军艳权磊左文锌于飞魏文鼎马宏岩
Owner HARBIN INST OF TECH
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