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Aggregate-adhesive cement weak boundary layer performance test method based on dynamic shear rheological test

A technology of rheological test and weak boundary layer, applied in the direction of applying stable shear force to test material strength, material inspection products, etc., can solve the problem of lack of weak boundary layer performance test of aggregate-glue interface, etc., to achieve test The effect of simple operation, simple test and processing of experimental data, and convenient promotion and application

Active Publication Date: 2018-03-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of lack of performance testing of the weak boundary layer of the aggregate-glue interface in the research on the multi-scale mechanical properties of the existing asphalt mixture, and provides a weak boundary layer of the aggregate-glue interface based on the dynamic shear rheological test layer performance test method

Method used

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  • Aggregate-adhesive cement weak boundary layer performance test method based on dynamic shear rheological test
  • Aggregate-adhesive cement weak boundary layer performance test method based on dynamic shear rheological test
  • Aggregate-adhesive cement weak boundary layer performance test method based on dynamic shear rheological test

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specific Embodiment approach 1

[0038] Specific embodiment one: a kind of aggregate-mucilage weak boundary layer performance test method based on dynamic shear rheological test of the present embodiment is carried out according to the following steps:

[0039] 1. Dry the mineral powder in an oven at a temperature of 100°C to 110°C, then place the dried mineral powder and asphalt in an oven at a temperature of 155°C to 165°C, and heat for 4h to 6h to obtain heating mineral powder and heating bitumen;

[0040] 2. Put the heated asphalt in a constant temperature container with a temperature of 155°C to 165°C, and under the condition of a stirring speed of 350r / min to 450r / min, add the heated mineral powder to the heated asphalt in portions, and stir evenly to obtain asphalt mortar;

[0041] The mass ratio of the heating mineral powder to the heating pitch is (0.8~1.2):1;

[0042] 3. Make the asphalt mortar into a round cake, then dry and cool to obtain the mortar specimen;

[0043] When the test temperature ...

specific Embodiment approach 2

[0070] Embodiment 2: This embodiment is different from Embodiment 1 in that: the volatile organic solvent described in step 6 is gasoline or petroleum ether; the volatile organic solvent described in step 10 is gasoline or petroleum ether. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0071] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step ten, the test condition is set for the dynamic shear rheometer, specifically, the control mode of the dynamic shear rheological test is set as the strain control mode, The applied dynamic strain amplitude is 0.25%, and the loading frequency is 10Hz. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses an aggregate-adhesive cement weak boundary layer performance test method based on a dynamic shear rheological test, relates to a pavement material performance test method, andsolves the problem that existing asphalt mixture multi-scale mechanical property research lacks of performance characterization of an aggregate-adhesive cement weak boundary layer. The method comprises the following steps: first, mounting an upper substrate which is adhered with a rock substrate and a lower substrate which is adhered with another rock substrate in a dynamic shear rheometer; then,rising the temperature of a test environment bin, and placing an adhesive cement test piece on the rock substrate of the lower substrate of the rheometer; next, compressing the thickness of the test piece to L1, testing a dynamic shear complex modulus G1 of the adhesive cement test piece through a test, and testing dynamic shear complex modulus Gi of other adhesive cement thickness Li to be tested; and finally, calculating each L / G ratio through L1-Li and G1-Gi, drawing an L / G-L curve, performing linear fitting according to a formula and then obtaining performance characterization parameters,namely alpha and A, of a rock aggregate-adhesive cement weak boundary layer.

Description

technical field [0001] The invention relates to a method for testing the performance of pavement materials. Background technique [0002] Asphalt pavement is widely used in expressway construction due to its excellent road performance and durability. Asphalt mixture as a pavement material is a typical heterogeneous and anisotropic multi-phase particle composite material. Its overall macroscopic physical and mechanical properties depend on the Due to the microscopic mechanical behavior of each component material and the interaction between components, it has significant multi-scale characteristics. The research on the multi-scale mechanical properties of asphalt mixture plays an important role in promoting the performance prediction of pavement materials, composition design and research and development of high-performance materials, so it has attracted extensive attention from scholars at home and abroad. Among them, the research on the adhesion characteristics of aggregate ...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N33/42
CPCG01N3/24G01N33/42
Inventor 董泽蛟刘志杨周涛杨晨辉
Owner HARBIN INST OF TECH
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