• Title/Summary/Keyword: 포장파손

Search Result 194, Processing Time 0.029 seconds

Structural Behavior and Distress of Asphalt Pavement on Concrete Bridge Decks (콘크리트 교면 아스팔트포장의 구조적 거동 및 파손)

  • Park, Seong-Wan;Lee, Hyun-Jong;Lee, Wan-Hoon
    • International Journal of Highway Engineering
    • /
    • v.6 no.1 s.19
    • /
    • pp.13-23
    • /
    • 2004
  • This paper presents the results of a study that was performed to evaluate structural behaviors and related distress of asphalt pavements on concrete bridge deck based on the visual inspection and 3-dimensional finite element analysis. As a result, three most failure types were found such as permanent deformation, potholes, and fatigue crackings. In addition, the failure mechanisms of different types of concrete bridge deck were investigated. An increase in fatigue of asphalt pavements on concrete bridge deck was observed and confirmed by the results from the visual inspections. In consequence, the aging and stripping of asphalt surfacing materials are relatively dominant factors on fatigue rather than traffic loadings.

  • PDF

Stochastic Disaggregation and Aggregation of Localized Uncertainty in Pavement Deterioration Process (포장파손과정의 지역적 불확실성에 대한 확률적 분해와 조합)

  • Han, Daeseok
    • KSCE Journal of Civil and Environmental Engineering Research
    • /
    • v.33 no.4
    • /
    • pp.1651-1664
    • /
    • 2013
  • Precise analysis on deterioration processes of road pavements is not so simple matter due to severe uncertainty originated from a lot of explanatory variables engaged in. For those reasons, most analytical models for pavement deterioration prediction have often preferred to probabilistic approaches than deterministic models. However, the general probabilistic approaches that treat overall characteristics of population or entire sample would not be suitable for providing detail or localized information on their changing process. Considering the aspects, this paper aimed to suggest a stochastic disaggregation method to analyze the localized deterioration speeds and its variances changed by time and condition states. In addition, life expectancies and their uncertainty were estimated by probabilistic algorithm using the disaggregated stochastic process. For an empirical study, pavement inspection data (crack) accumulated from 2003 to 2010 from Korean national highway network was applied. This study can contribute to securing reliability of life cycle cost analysis, which is one of the primary analyses in road asset management, with much advanced deterioration forecasting functions. In addition, it would be meaningful trials as fundamental research for preventive maintenance strategy that demands essential understanding on changing process of the deterioration speed of pavement.

The Permanent Deformation of Asphalt Pavement by Artificial Neural Networks (인공신경망을 이용한 아스팔트포장의 소성변형파손모형)

  • Lee, Kwan-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.11 no.8
    • /
    • pp.3100-3105
    • /
    • 2010
  • The permanent deformation of asphalt pavement is one of the most important load-related distresses in asphalt pavement. In order to evaluate the permanent deformation, the repeated triaxial load test with different temperature and air void of hot mix asphalt was carried out. The permanent deformation prediction model has been validated by the multiple regression approach and the artificial neural networks.

Development of a Spatting Model of Jointed Concrete Pavement by Investigating Long-Term Highway Pavement Performance (고속도로 장기 공용성 조사에 의한 줄눈 콘크리트 포장의 스폴링 모형 개발)

  • Jeong, Jin-Hoon;Yoo, Tae-Seok;Sim, Jong-Sung
    • International Journal of Highway Engineering
    • /
    • v.7 no.2 s.24
    • /
    • pp.77-86
    • /
    • 2005
  • A spalling model for jointed connote pavements(JCP) was developed using the data of distresses, climates, and materials at the sections of long-term pavement performance(LTPP) investigation. The total of forty-four spatting distress data was collected at twenty-two JCP LTPP sections in 1999 and in 2004. In addition, the data of climates, geometric shapes of the slabs, and material properties was also collected at those times. Factors significantly influencing the spalling distress were found by a sensitivity analysis for the data. Consequently, a spatting model was developed by a multi-regression analysis for the factors. The model showed reasonable trend of the spatting development comparing to other foreign models.

  • PDF

Development of Deterioration Model for Cracks in Asphalt Pavement Using Deep Learning-Based Road Asset Monitoring System (딥러닝 기반의 도로자산 모니터링 시스템을 활용한 아스팔트 도로포장 균열률 파손모델 개발)

  • Park, Jeong-Gwon;Kim, Chang-Hak;Choi, Seung-Hyun;Do, Myung-Sik
    • The Journal of The Korea Institute of Intelligent Transport Systems
    • /
    • v.21 no.5
    • /
    • pp.133-148
    • /
    • 2022
  • In this study, a road pavement crack deterioration model was developed for a pavement road sections of the Sejong-city. Data required for model development were acquired using a deep learning-based road asset monitoring system. Road pavement monitoring was conducted on the same sections in 2021 and 2022. The developed model was analyzed by dividing it into a method for estimating the annual average amount of deterioration and a method based on Bayesian Markov Mixture Hazard model. As a result of the analysis, it was found that an analysis results similar to the crack deterioration model developed based on the data acquired from the Automatic pavement investigation equipmen was derived. The results of this study are expected to be used as basic data by local governments to establish road management plans.

Performance Improvement of Thin Pavement Layer using Epoxy and Ceramics Composite Materials (에폭시와 세라믹스를 결합한 혼합물 이용 박층 포장공법의 성능개선)

  • Kim, Wan-Sang;Kim, Nak-Seok
    • Journal of the Korean Society of Hazard Mitigation
    • /
    • v.8 no.5
    • /
    • pp.65-70
    • /
    • 2008
  • Asphalt concrete pavements are susceptible to deformation and failure compared to cement concrete pavements. Epoxy is commonly used to enhance the bonding and durability of structures. Based on this concept, an epoxy and ceramics combined mixture was developed and applied to the field to estimate the pavement performance, Laboratory and field performance tests were conducted to observe the applicability of epoxy and ceramics composite materials compared to the conventional one. In this research, the epoxy and ceramics composite mixturewas used in two ways. 7 mm and 15 mm of thin surface layers using the mixture were constructed on cement and asphalt concrete pavements, respectively, after surface treatment. 12 months of field performance surveys were conducted to observe the resistances to the crack and deformation. According to the field performance tests, epoxy and ceramics combined mixture showed better bonding and field performances than the conventional one.

시멘트 콘크리트 도로 포장의 현안 및 기술 동향

  • Han, Seung-Hwan
    • Cement Symposium
    • /
    • s.35
    • /
    • pp.56-60
    • /
    • 2008
  • 시멘트 콘크리트 포장은 도로 포장의 대표적인 구조 및 재료 형식의 하나로서 1970년대 이후 고속도로 현장올 중심으로 많이 시공되어져 왔다. 그러나 최근 다양한 파손이 발생하고, 친환경적인 지속가능한 발전의 논의에서 소외되는 측면이 있다. 그러나 국외의 사례에서 볼 수 있듯이 종합적이고 체계적인 노력에 의해 상대적인 경쟁력이 평가받을 수 있으며, 현재 이러한 노력이 필요한 시점이라고 판단된다. 본고는 이러한 관점에서 국내의 기술현안과 국내외 기술 개발 내용을 살펴보고자 한다.

  • PDF

A Study on the Factors Affecting on the Life of Bonded Concrete Overlay Pavement using the LTPP Data of U.S.A (미국 LTPP Data를 활용한 접착식 콘크리트 덧씌우기 포장 수명에 영향을 미치는 인자에 관한 연구)

  • Lee, Seung Woo;Son, Hyeon Jang
    • KSCE Journal of Civil and Environmental Engineering Research
    • /
    • v.31 no.4D
    • /
    • pp.555-564
    • /
    • 2011
  • More than sixty percentages of the highway constructed by concrete pavements in South Korea and over half of the concrete pavements were twenty years or older. The most of South Korea road is hard to provide a bypass in conditions of network of roads. Asphalt concrete overlay has been used for the overlay of aged concrete pavement. However, the cost of maintenance and rehabilitation in an asphalt overlay is expensive by early damage. Therefore, bonded concrete overlay was recently attempted in South Korea as an alterative method of rehabilitation for aged concrete pavement. Hence, it needed to investigate the factors to find performance of the bonded concrete overlay life. However, there is no performance data of the concrete overlay in South Korea. This study was to make a database of an affecting of the pavement life and draws statistical analysis of the performance data on the LTPP (Long Term Pavement Performance) database of U.S.A.

Selection of Long-Term Pavement Performance Sections for Development of Distress Prediction Model in National Asphalt Pavement (국도 아스팔트 포장 파손예측모델 개발을 위한 장기 관측 구간 선정에 관한 연구)

  • Kwon, Soo-Ahn;Yoo, Pyeong-Joon;Kim, Ki-Hyun;Cho, Yoon-Ho
    • International Journal of Highway Engineering
    • /
    • v.4 no.1 s.11
    • /
    • pp.123-134
    • /
    • 2002
  • Special pavement test sections were selected to develop a distress prediction model on asphalt pavement of National Highway. Experimental design was conducted for the selection of LTPP sections on in-service pavement(new and overlaid pavement) using several variables affecting pavement performance. Preliminary sections that satisfied the design template were chosen from the national highway database, and final selection was fixed through field inspection. The number of monitoring section is 95 including 47 overlaid pavement. A pavement distress data such as crack and rutting were collected for two years. An interim pavement performance analysis was peformed to show feasibility of performance monitoring program. Data related pavement such as traffic, weather, material characteristic and crack etc. should be collected for next project years and distress prediction model will be developed through the statistical analysis.

  • PDF