• Title/Summary/Keyword: 도로포장설계

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Interaction of a road-pavement system with pollution sources and environments (도로-포장시스템의 오염원 및 주변환경적 요인과의 상호작용)

  • Kim, Tae-Hyung;Nam, Jung-Man;Jeong, Jin-Seob
    • International Journal of Highway Engineering
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    • v.6 no.3 s.21
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    • pp.47-54
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    • 2004
  • The performance of road-pavement system is closely related to the constituent materials and their susceptibility to mechanical as well as physicochemical stresses. However, the influence of physical and chemical effects on the road-pavement system due to pollution intrusion has not been investigated fully. To study this topic, thu.;, the interaction of a road-pavement system with pollution sources and environments are identified and discussed preliminarily in this paper. Pollution intrusion to road-pavement system occurs by three basic mechanisms; 1) direct intrusion into pavement surface, 2) intrusion from the Right of way, and 3) physical-chemical-biological alterations. Pollution intrusion potential is closely related to material type, particle size, and climatological and topographical features. Stability and performance of road-pavement system is also directly affected by pollution intrusion. Based on these features, thus, engineers working in related to the road design, construction, and maintenance should be seriously considered this topic.

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Evelopment of a Practical Mechanistic-Empirical design Procedure for Flexible Pavements (역학적이론과 경험에 근거한 실용적 연성포장 설계법 개발)

  • Park, Dong-Yeob;Kim, Hyung-Bae;Buch, Neeraj;Suh, Young-Chan
    • International Journal of Highway Engineering
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    • v.4 no.3 s.13
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    • pp.1-13
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    • 2002
  • Design methods for new flexible pavements and overlays are in the transition from empirical to mechanistic approach, and many state highway agencies trend to move toward the adoption and use of mechanistic-empirical (M-E) design in new constructions and rehabilitations of flexible pavements. Hence, the Michigan Department of Transportation (MDOT) decided to develop a M-E flexible pavement design procedure, in which major pavement distresses such as fatigue cracking and rutting are employed as indicators of the serviceability of a flexible pavement. The main concept of the developed design procedure is that a designed pavement that is supposed to carry a certain number of traffic must satisfy designated thresholds of rut depths and fatigue lives during a service period. For the M-E design procedure, transfer functions were developed to predict rut-depths and fatigue lives. These functions related the pavement responses to pavement performance. For validation, three current new flexible pavement design cases were obtained from the MDOT. In these cases, asphalt concrete (AC) layer thicknesses determined by the suggested M-E procedure compare favorably with those determined by the current MDOT design practice that is based on AASHTO design guide. This finding implies that the suggested Michigan M-E flexible pavement design procedure can provide a good opportunity to improve the current design practice.

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Improvement of Airfield Concrete Pavement Evaluation Method (공항 콘크리트 포장 평가방법 개선 연구)

  • Eom, Byung-Sik;Park, Kyung-Bu;Suh, Young-Chan
    • International Journal of Highway Engineering
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    • v.2 no.3
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    • pp.155-165
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    • 2000
  • Periodical evaluations of the airfield pavement are necessary to provide the ability for the existing pavement to support the increasing volume of air traffic. Also, the evaluation of the existing Pavement condition is necessary for the decision of the maintenance strategy. For this reason, airport pavements in Korea have been evaluated every five years currently. It was known, however, that the current pavement evaluation methodology was not logical and practical. The purpose of this study is to compare the current pavement evaluation method with design chart to the mechanistic approach used in other advanced countries. As a result of this study the mechanistic approach is found to be more logical than the current method.

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