A test fixture and test method for obtaining fracture mechanics parameters of asphalt mortar and aggregate interface at the mesoscopic scale

A test fixture and parameter acquisition technology, applied in scientific instruments, analytical materials, strength characteristics, etc., can solve the problems of difficult to eliminate the structure, difficult to quantitatively control the thickness of the interface, etc., to achieve the effect of eliminating the size effect

Active Publication Date: 2021-07-20
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

[0003] Technical problem to be solved: This application mainly proposes a test fixture and test method for obtaining the fracture mechanics parameters of the asphalt mortar and aggregate interface at the mesoscopic scale, and solves the difficulty in eliminating the structural influence in the prior art to achieve pure material fracture behavior, difficult to quantitatively control the interface thickness and other technical problems, a test fixture and test method for obtaining the fracture mechanics parameters of the asphalt mortar and aggregate interface at the mesoscopic scale are provided

Method used

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  • A test fixture and test method for obtaining fracture mechanics parameters of asphalt mortar and aggregate interface at the mesoscopic scale
  • A test fixture and test method for obtaining fracture mechanics parameters of asphalt mortar and aggregate interface at the mesoscopic scale
  • A test fixture and test method for obtaining fracture mechanics parameters of asphalt mortar and aggregate interface at the mesoscopic scale

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail:

[0033] Such as figure 1 As shown, the test fixture for obtaining the fracture mechanics parameters of asphalt mortar and aggregate interface at the mesoscopic scale is composed of three parts, namely: the main body of the test fixture, the specimen pouring platform 5 and the thickness control block of asphalt mortar film. The main body of the test fixture is composed of two T-shaped fixtures 1 arranged symmetrically; the fixture head 2 is 20mm long, 20mm wide, and 3mm thick. There is a square groove in the center with a length of 10mm, a width of 10mm, and a depth of 1mm, which is used to fix the aggregate test. The position of the parts; there is an aggregate 3 in the groove, and epoxy hard glue is used between the aggregate 3 and the clamp head 2, and a layer of asphalt glue film 4 is adhered between the aggregate 3, and the clamp The tai...

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Abstract

This application discloses a test fixture and its test method for obtaining fracture mechanics parameters of asphalt mortar and aggregate interface at the mesoscopic scale. The test fixture includes the following components: test fixture main body, specimen pouring platform and asphalt mortar film thickness Control flap; test method includes the following steps: screening aggregates, pouring epoxy hard glue, cutting aggregates, pouring asphalt membrane, pasting fixtures, installing end wedge fixtures, applying loads and recording data, and calculating interfacial tensile fracture mechanics parameters; this test method can realize the determination of the tensile fracture mechanics parameters of the asphalt mortar and aggregate interface at the mesoscale, and can eliminate the influence of factors such as size effects and boundary conditions in the macroscale test; this method can quantitatively control the asphalt mortar It is suitable for measuring the interface between different types of asphalt mortar and aggregates.

Description

technical field [0001] The invention relates to a test fixture and a test method for obtaining fracture mechanics parameters of asphalt mortar and aggregate interface on a mesoscopic scale, belonging to the technical field of road engineering. Background technique [0002] The fracture behavior of asphalt mixture is an important topic in the field of road engineering research. The interface between asphalt mortar and aggregate is considered to be the weak link in the crack resistance of asphalt mixture materials. Cracks initiate and expand from the interface and eventually lead to material fracture and failure. . At present, the test for obtaining the fracture mechanics parameters of the interface between asphalt mortar and aggregate mainly faces the following two problems: In the macroscopic test of conventional scale, there are structural effects, size effects, boundary constraints and other influencing factors, which make the test results have errors that are difficult to...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04G01N3/08G01N3/02
Inventor 马涛顾临皓丁珣昊张伟光吴少鹏肖月
Owner SOUTHEAST UNIV
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