Method for Assessing the Effect of Design Parameter Variability on Mixture Dynamic Modulus Variability

A technology of design parameters and dynamic modulus, applied in the direction of material inspection products, etc., can solve problems such as performance degradation of asphalt pavement, hidden safety hazards, and affecting the service level of pavement

Active Publication Date: 2016-04-13
CHANGAN UNIV
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Problems solved by technology

[0002] In the initial stage of operation (2 to 3 years) in my country, the asphalt pavement is severely damaged in the early stage, such as cracking, rutting, water damage, etc. These diseases directly lead to the decline in the performance of asphalt pavement, which affects the service level of the pavement and is accompanied by serious safety hazards. Hidden danger

Method used

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  • Method for Assessing the Effect of Design Parameter Variability on Mixture Dynamic Modulus Variability
  • Method for Assessing the Effect of Design Parameter Variability on Mixture Dynamic Modulus Variability
  • Method for Assessing the Effect of Design Parameter Variability on Mixture Dynamic Modulus Variability

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Embodiment 1

[0021] Taking the NCHRP1-37A viscosity model as an example, the method for evaluating the influence of design parameter variability on the dynamic modulus variability of mixtures consists of the following steps:

[0022] (1) The NCHRP1-37A viscosity model is selected as the dynamic modulus prediction model of asphalt mixture, and its expression is:

[0023] log 10 E * = - 1.249937 + 0.029232 ρ 0.075 - 0.001767 ρ 0.075 2 - 0.002841 ρ 4.75 - ...

Embodiment 2

[0059] In this embodiment, the asphalt mixture dynamic modulus prediction model is replaced by the NCHRP1-40D shear modulus model, and the design parameters involved in the model are asphalt composite shear modulus, asphalt phase angle, loading frequency, 0.075mm Sieve hole passing rate, 2.36mm, 4.75mm and 9.5mm sieve hole accumulative sieve rejection rate, mixture void ratio and effective asphalt volume ratio. The above-mentioned same asphalt mixture was tested according to the method of Example 1 above, thereby determining the contribution of each design parameter variability of each asphalt mixture to the variability of the dynamic modulus of the asphalt mixture and calculating the dynamic modulus of the asphalt mixture. Modulus coefficient of variation with respect to the partial derivative of the coefficient of variation of each design parameter, it is determined that reducing the coefficient of variation of 4.75mm sieve hole cumulative rejection rate has the greatest impa...

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Abstract

The invention relates to a method for evaluating an influence of design parameter variability on variability of a mixture dynamic modulus. According to a prediction model of a selected bituminous mixture dynamic modulus, design parameters related to the bituminous mixture dynamic modulus are determined, the variable coefficients of the design parameters and partial derivatives of the design parameters related to the bituminous mixture dynamic modulus are calculated, an error propagation formula is utilized for deduction and calculation so as to determine the variability source of the bituminous mixture dynamic modulus and evaluate the influence level of reducing the variability of the design parameters on reducing the variability of the bituminous mixture dynamic modulus; in addition, with adoption of the method, the design parameters, by controlling the variability of which, the variability of the bituminous mixture dynamic modulus can be efficiently reduced, can be determined. According to the invention, the variability of the bituminous mixture dynamic modulus can be reduced to the greatest extent, the performance of an asphalt pavement can be ensured, and the production of the asphalt pavement can be guided to some extent.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement construction quality control, and in particular relates to a method for evaluating the influence of design parameter variability on the dynamic modulus variability of asphalt mixture. Background technique [0002] In the initial stage of operation (2 to 3 years) in my country, the asphalt pavement is severely damaged in the early stage, such as cracking, rutting, water damage, etc. These diseases directly lead to the decline in the performance of asphalt pavement, which affects the service level of the pavement and is accompanied by serious safety hazards. Hidden danger. Strictly controlling the construction quality of asphalt pavement can effectively reduce the possibility of early disease of asphalt pavement, improve the performance of asphalt pavement and prolong the service life of pavement. Studies have shown that the loose control of main parameters during asphalt pavement construct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/42
Inventor 裴建中胡栋梁李蕊张久鹏陆瑞国王鹏志张柳戴阳
Owner CHANGAN UNIV
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