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Method for determining optimum preventive maintenance opportunity of asphalt pavement

A preventive maintenance, asphalt pavement technology, applied in the direction of strength characteristics, measuring devices, instruments, etc., to achieve the effect of delaying development, prolonging life, and improving accuracy

Active Publication Date: 2018-02-27
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no public report on the method of determining the best time for preventive maintenance of asphalt pavement by studying the relationship between the mesoscopic damage inside the asphalt pavement structure and the development law of pavement disease

Method used

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  • Method for determining optimum preventive maintenance opportunity of asphalt pavement
  • Method for determining optimum preventive maintenance opportunity of asphalt pavement
  • Method for determining optimum preventive maintenance opportunity of asphalt pavement

Examples

Experimental program
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Embodiment Construction

[0048] A method for determining the best time for preventive maintenance of asphalt pavement includes the following steps:

[0049] The first step: sampling

[0050] The test section is the K1108+000~K1112+000 section of Xiangtan-Shaoyang Expressway in Hunan Province after the 2016 overhaul. The pavement structure is 4cm thick modified asphalt SMA-13 ​​upper layer + 6cm thick modified asphalt AC-20C middle surface layer+1cm Thick SBS modified asphalt waterproof and anti-crack bonding layer + 6cm thick 50# A-grade asphalt AC-20C lower layer + 1cm modified asphalt synchronous gravel seal. 4 reference samples were drilled on the shoulder of the road section, and 8 test samples were drilled on the wheel track belt, deformed recessed part of the road section, or the part where visible cracks have occurred. Sampling date: May 2017;

[0051] Step 2: Data collection of ultimate splitting strength of reference sample

[0052] The ultimate splitting strength test of asphalt mixture was carrie...

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Abstract

The invention discloses a method for determining an optimum preventive maintenance opportunity of asphalt pavement. Based on a micro aspect of an asphalt mixture, for the actual service conditions ofthe asphalt pavement, tiny damage of the asphalt pavement is evaluated, a determination standard for determining that the asphalt mixture enters a rapid damage period is combined with the relation between the development of micro-cracks inside the asphalt pavement structure and the development of the asphalt pavement disease to determine the optimum opportunity for carrying out preventive maintenance. Based on the damage mechanism of the asphalt mixture, corresponding micro indexes are established as a determination index for the optimum preventive maintenance opportunity, so that compared with a life cycle evaluation method, a benefit charge evaluation method, a decision tree method, a ranking method, a pavement condition or time-based method, driving quality indexes, damage indexes and aging-based method, the method disclosed by the invention is higher in pertinence and origination, capable of quantifying the indexes, higher in accuracy and better in operability.

Description

Technical field [0001] The invention discloses a method for determining the optimal time for preventive maintenance of asphalt pavement; it belongs to the technical field of asphalt pavement structural disease damage cycle assessment. Background technique [0002] Preventive maintenance of asphalt pavement refers to the active maintenance measures taken under the condition that the asphalt pavement technology is in good condition and there are no structural diseases; structural disease refers to the obvious deformation of the asphalt pavement such as large cracks, rutting, shifting, etc. Severe damage caused by the joint action of cracks and water, such as net cracks, cracks, and mud. [0003] At present, there are many domestic and foreign researches on the method of determining preventive maintenance timing, and many results have been obtained. The representative methods are mainly: life cycle assessment method, benefit cost assessment method, decision tree method, ranking method...

Claims

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Application Information

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IPC IPC(8): G01N3/00G01N23/046G01N33/42G01N1/08
Inventor 李雪莲陈宇亮刘雪莹李章闯王文强彭宇吕新潮杨乐
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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