Method for testing rut resistance of multi-layered combined structure mixtures of bituminous pavements

A combined structure and asphalt pavement technology, applied in the direction of applying repeated force/pulsation force to test the strength of materials, etc., can solve the problem that the thickness of the specimen cannot be changed, the multi-layer combination test cannot be performed, and the high-temperature performance of asphalt mixture cannot be evaluated and analyzed, etc. Problems, to achieve the effect of perfect detection and design work

Inactive Publication Date: 2013-02-27
CHANGAN UNIV
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Problems solved by technology

[0004] In order to solve the current rutting test using the standard method of asphalt mixture rutting test, the thickness of the specimen cannot be changed, and the multi-layer combination test cannot be carried out. It can only evaluate the high-temperature performance of a single-layer fixed-thickness asphalt mix

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  • Method for testing rut resistance of multi-layered combined structure mixtures of bituminous pavements
  • Method for testing rut resistance of multi-layered combined structure mixtures of bituminous pavements
  • Method for testing rut resistance of multi-layered combined structure mixtures of bituminous pavements

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Embodiment

[0072] The structural factors affecting the high-temperature performance of asphalt pavement mainly include the thickness of the asphalt layer, the modulus (strength) ratio of the structural layer, and the contact conditions between layers. According to the above three influencing factors, formulate the composite structure rutting test plan (Table 1), and carry out the asphalt pavement composite structure rutting test:

[0073] Table 1: Composite structure rutting test scheme

[0074]

[0075] The mix of AC-13 and AC-20 asphalt mixtures used in the test is shown in Table 2~Table 3. The asphalt is Esso AH-90 matrix asphalt, the coarse and fine aggregates are limestone, the mineral powder is ground limestone, and various materials The technical indicators are in line with the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004).

[0076] Table 2: Design of AC-13 Mixture Proportion

[0077] mesh size

13.2

9.5

4.75

2.36 ...

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Abstract

The invention discloses a method for testing the rut resistance of multi-layered combined structure mixtures of bituminous pavements. The method utilizes a multi-layered combined structure bitumen mixture rut test mold to mold a rut test specimen in a layered mode, and then utilizes an improved conventional domestic rut instrument to carry out a rut test. According to a relation curve between rut depth and test wheel running time, the rut resistance of a bituminous pavement combined structure is evaluated. The method overcomes the defect that the conventional rut test can only evaluate the high-temperature performance of single-layered fixed-thickness bitumen mixtures and cannot evaluate and analyze the high-temperature performance of bitumen mixtures with different thicknesses and structural combinations, can carry out multi-layered combined structural bitumen mixture rut tests and accurately evaluate the influence of combined structures on the rut resistance of bituminous pavements under the action of vehicle load, and has important practical significance in perfecting the bituminous pavement test and design method of China.

Description

technical field [0001] The invention belongs to the application technical field of asphalt pavement pavement performance testing and evaluation, and in particular relates to a detection method for high-temperature anti-rutting performance of asphalt mixture with multi-layer composite structure of asphalt pavement. Background technique [0002] Over the past ten years, my country's expressways have achieved world-renowned achievements, but at the same time, we can also see that with the increase of heavy-duty traffic, the early damage of expressways is also becoming more and more serious. Serious early damages such as rutting and potholes appeared in some expressways within 1 to 2 years after they were completed and opened to traffic. Expressway asphalt pavement is not paved with a single mixture, but is paved with layers of asphalt mixtures with different properties. Rutting on asphalt pavement is the result of permanent deformation accumulation of multi-layer asphalt mixtur...

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Application Information

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IPC IPC(8): G01N3/34
Inventor 张争奇陶晶杨博张苛
Owner CHANGAN UNIV
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