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Method for predicting residual service life of asphalt pavement according to fatigue-modulus comprehensive performance of core sample

A technology of asphalt pavement and comprehensive performance, which is applied in sampling devices, and uses repeated force/pulse force to test the strength of materials, etc., can solve the problem of inability to predict the life of asphalt mixture, and achieve the effect of overcoming randomness.

Active Publication Date: 2015-08-19
WUHAN UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, each method has certain limitations, and it cannot predict the life of asphalt mixture systematically as a whole.

Method used

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  • Method for predicting residual service life of asphalt pavement according to fatigue-modulus comprehensive performance of core sample
  • Method for predicting residual service life of asphalt pavement according to fatigue-modulus comprehensive performance of core sample
  • Method for predicting residual service life of asphalt pavement according to fatigue-modulus comprehensive performance of core sample

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Embodiment Construction

[0035] The following examples further illustrate the technical solutions of the present invention but are not intended to limit the protection scope of the present invention.

[0036] (1) Core sampling

[0037] The traffic volume and disease types of the target asphalt concrete road are investigated and analyzed, and the main characteristic diseases of the road are obtained. Carry out core sampling in the traffic lanes and emergency traffic lanes near the diseased location, and the retrieved core samples are cut according to the thickness of the surface layer. The rebound modulus test and indirect tensile fatigue test were carried out on the cut core samples by indirect tension in the laboratory, and dynamic load was used throughout the test process.

[0038] (2) Indirect tensile modulus of resilience test.

[0039] The cut core samples were kept in an environmental chamber for more than 4 hours. The experimental temperatures were 5°C, 25°C, and 40°C, and the loading frequen...

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Abstract

The invention discloses a method for predicting residual service life of an asphalt pavement according to fatigue-modulus comprehensive performance of a core sample. The method comprises the following steps: boring a core and sampling at a typical disease position of an asphalt pavement; determining resilience modulus of the core sample under the action of dynamic loading; determining a deformation-cyclic loading frequency curve for a core sample fatigue test; modeling to predict the residual service life of the asphalt pavement. The method further comprises a step of combining with a temperature factor to obtain the practical life of the pavement, and further comprises a step of combining with a traffic factor to obtain the practical life of the pavement. According to the method provided by the invention, the viscoelastic property of an asphalt mixture is comprehensively considered; due to the dynamic loading action, the practical stress situation of the pavement is stimulated, the modulus of different positions is analyzed and compared, the residual service of the pavement is described by a fatigue curve, quantitative residual life prediction is provided for maintenance of an asphalt concrete pavement, and randomness of the selection on pavement maintenance time for a long time can be overcome.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a method for predicting the remaining life of an asphalt pavement through the fatigue-modulus comprehensive performance of a core sample. Background technique [0002] Asphalt concrete pavement has the advantages of good surface smoothness, little impact on vehicle and aircraft vibration, smooth and comfortable driving and aircraft taxiing, etc., and quick construction, convenient maintenance and renewable, so it is widely used in highways, bridge decks and airport runways. It has a wide range of applications on the highway. With the rapid development of high-grade highways, the service performance requirements in all aspects are also getting higher and higher. In recent years, my country's high-grade asphalt concrete pavement has shown increasingly serious pavement damage with the increase of service time, mainly in the form of cracks, potholes, ruts and other diseas...

Claims

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Application Information

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IPC IPC(8): G01N3/32G01N1/08
Inventor 吴少鹏仪明伟肖月王业飞秦哲焕陈宗武
Owner WUHAN UNIV OF TECH
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