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Method for determining dynamic modulus of asphalt mixture in real time

A technology of asphalt mixture and dynamic modulus, which is applied in the direction of measuring devices, analyzing materials, and testing the strength of materials by applying repeated force/pulsation force, which can solve the problem of inability to accurately evaluate asphalt pavement service conditions and inability to accurately analyze asphalt pavement pavement service Performance and other issues, to achieve the effect that is conducive to structural design, maintenance and repair, and prolong service life

Inactive Publication Date: 2022-02-25
SHANDONG HI SPEED GRP CO LTD +3
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Problems solved by technology

However, asphalt pavement will be affected by different traffic loads and environmental conditions during the actual service process. Simply using the dynamic modulus of asphalt mixture at 10 Hz and 20 °C cannot accurately analyze the service performance of asphalt pavement, so that it is impossible to provide a comprehensive analysis of asphalt pavement. Accurate assessment of service conditions provides a strong basis

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  • Method for determining dynamic modulus of asphalt mixture in real time
  • Method for determining dynamic modulus of asphalt mixture in real time
  • Method for determining dynamic modulus of asphalt mixture in real time

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Embodiment 1

[0045] This embodiment takes the expressway asphalt pavement in Jinan, Shandong as an example, selects the experimental section on the expressway, and adopts a method for determining the dynamic modulus of asphalt mixture proposed by the present invention in real time to monitor the dynamic modulus of asphalt mixture in the experimental section , including the following steps:

[0046] Step 1. Obtain the pavement structure of the experimental road section, such as figure 1As shown, the pavement structure from top to bottom is the asphalt layer (including the upper layer, the middle layer and the lower layer), the granular layer and the roadbed, and the thickness of the asphalt layer It is 180mm, and the granular material layer is set as 34cm graded crushed stone. The asphalt layer is successively arranged as the upper layer, the middle layer and the lower layer from top to bottom. The upper layer is 40mm thick and is paved with SMA13. %; the thickness of the middle surface ...

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Abstract

The invention provides a method for determining the dynamic modulus of an asphalt mixture in real time, and belongs to the technical field of road engineering. The method comprises the following steps of: performing a uniaxial compression dynamic modulus experiment on an asphalt mixture sample prepared according to an actual asphalt pavement, measuring dynamic moduli of the asphalt mixture sample at different temperatures and loading frequencies, obtaining an asphalt mixture dynamic modulus main curve, establishing an asphalt mixture dynamic modulus calculation model, arranging an intelligent monitoring system for the dynamic modulus of the asphalt mixture on a monitored pavement, measuring the internal temperature and the running speed of the asphalt pavement in real time, and determining the dynamic modulus of the asphalt mixture of the asphalt pavement by utilizing an asphalt mixture dynamic modulus calculation model in the intelligent monitoring system for the dynamic modulus of the asphalt mixture. According to the invention, real-time monitoring of the dynamic modulus of the asphalt mixture is realized, accurate material parameters are provided for evaluating the service performance of the asphalt pavement structure, the structural design and maintenance of the asphalt pavement are guided, and the service life of the asphalt pavement is prolonged.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a method for determining the dynamic modulus of asphalt mixture in real time. Background technique [0002] The dynamic modulus of asphalt mixture, as an important parameter to characterize the material properties in the service performance analysis of asphalt pavement, is an important basis for the structural design and maintenance of asphalt pavement. Because the mechanical properties of asphalt mixture are easily affected by loading time and temperature, resulting in its dynamic modulus being a specific value under specific conditions (loading time and temperature), currently, the asphalt mixture is usually used under the conditions of 10Hz, 20℃ The dynamic modulus analyzes the service performance of asphalt pavement and evaluates the pavement service condition of asphalt pavement. However, asphalt pavement will be affected by different traffic loads and environmenta...

Claims

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Application Information

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IPC IPC(8): G01N3/34
CPCG01N3/34G01N2203/0005G01N2203/0019G01N2203/0075G01N2203/0222G01N2203/0252G01N2203/0694G01N2203/0032G01N2203/0676
Inventor 周勇王林韩文扬吕思忠韦金城马士杰纪少波
Owner SHANDONG HI SPEED GRP CO LTD
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