• Title/Summary/Keyword: road paving

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A Study on the Pedestrian Environment Analysis of the Residential Area in Residential Development (택지개발사업지구 내 주거지역의 보행환경 분석 연구)

  • Kwo, Yong-Il
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2008.11a
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    • pp.226-230
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    • 2008
  • The purpose of this study is to analyse the pedestrian environment of the residential area in residential development. The result of the research are follows; first, the pedestrian environment in the apartment quarter is better than independent residential quarter. second, the pedestrian and the automobile use together the street, because the side walk ist not established from the road where the width is narrow. finally, the condition of side walk paving ist bad, so that the pedestrian environmental level decreased badly

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A Study on the mix design for the Soilcrete by Using FGC Soil Stabilizer (FGC계 고화재를 이용한 Soilcrete 배합설계에 관한 연구)

  • 천병식;고갑수;김진춘;하상욱
    • Proceedings of the Korean Geotechical Society Conference
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    • 1999.10a
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    • pp.293-300
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    • 1999
  • Soilcrete has been the traditional material for the paving and soft ground improvement techniques. But because the durability is not excellent and the quality is not homogeneous, it has not been used for the various purposes up to date. And because the quality of soilcrete is apt to be changed by the content of water and soil stabilizer, and the kind of soil and soil stabilizer, it is not free of cares. But with the increase of naturally oriented needs for the light traffic road such as pedestrian roads of the garden, golf courses and sidewalks, the cases of soilcrete paving has been increased recently. This study aims at making the reference table of the mix design in accordance with the required design specifications for the soilcrete admixtures by the FGC soil stabilizer by using the statistical experiment method. The treated soil is the clay which are widely spreaded in Korea. As the results of this study we can derive the effective reference mix design table for the clay soil treated by the FGC soil stabilizer in accordance with the compressive strength of 50∼200kg/$\textrm{cm}^2$ soilcrete with respect to the contents of water, soil stabilizer and fine sand.

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Landscape Design of Community Center and Assembly Hall of Gwangjin-Gu (광진구 구민회관 및 구의회청사 조경설계)

  • 김도경;최원만
    • Journal of the Korean Institute of Landscape Architecture
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    • v.29 no.5
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    • pp.60-70
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    • 2001
  • This landscape design proposal was presented to a design competition for Gwangjin-gu Community Center and Assembly Hall. The site is located in 227-7 Jayang-dong, Gwangjin-gu, Seoul and is part a block designated as \`Kunkuk University Detailed Planning District\`. The judging criteria for landscape design set by the Gwangjin-gu could be articulated as follows: an identity of Gwangjin-gu, a relationship with surrounding environment, a locale as a community center of Gwangjin-gu, and an environment-friendly design. An identity of Gwangjin-gu was expressed by introducing lends and decks around the building which were transformed from the image of the old Gwangjin Ferry. The concept\` was strengthened by \`Nori-madang\` or Korean version of \`plaza\` which was designed by a motive of \`mungsuk\` or Korean old fashioned straw mat. An ambiguous relationship between the site and the surroundings was set by \`transparent exhibition frame\` which not only bleaks the massive Chungdam-daegyo, an elevated road, and frames it into small parts, but also attracts pedestrians toward the site-the \`park\`. Pedestrians from the adjacent\` Nengdong-ro Walkable Streets\` views the site through the many parts of frames. By introducing diverse resting and dynamic spaces for many kinds of cultural activities the site could function as a locale of the Gwangjin-gu community. The main paving system reflects the environment- friendly design. It was detailed by \`PC-block-deck-paving\` which was elevated from the ground so that rains could be absorbed.

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Evaluation for Application of Warm-mix Asphalt Concrete for Rural Road Pavement (농촌 도로 포장용 준고온 아스팔트 콘크리트 적용 평가)

  • Lee, Sungjin;Kim, Kwang W.;Kim, Sungun
    • Journal of The Korean Society of Agricultural Engineers
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    • v.63 no.2
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    • pp.41-50
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    • 2021
  • The asphalt pavement industry has introduced the warm-mix asphalt (WMA) as a mean of energy saving and environmentally safe technology, because the WMA mixture can be mixed and compacted at 30℃ lower than conventional hot-mix asphalt (HMA) at 160℃ or higher. The implementation of WMA can be a good option for paving operations for rural road in remote place, not only due to energy saving and environmental issues, but also lower working temperature. Using WMA technology, the cooled-down asphalt mixture can be still compacted to meet the quality requirement in narrow winding rural road in remote places. Therefore, this study is designed to evaluate engineering properties of WMA binders and concretes, which were prepared for rural road pavement. The objective of the study was to evaluate and suggest proper fundamental properties level of the WMA concrete for rural road pavement. The kinematic viscosity test result indicated that the WMA binders used in this study were effective for compaction at lower temperature, i.e., at 115℃, compared to the HMA binder. According to strength property analyses, it was found that the WMA concrete was acceptable for rural road pavement even though it was compacted at 30℃ lower level. Since the deformation strength (SD) of 3.2 MPa was found to satisfy rutting and cracking resistance minimum guidelines, this value was suggested as a minimum SD value for rural road pavement, considering lack of maintenance program for rural area.

An Experimental Study on NOx Degradation Efficiency and Physical Characteristics of Maximum Size 40 mm Porous Concrete (굵은골재 최대치수 40 mm 투수 콘크리트의 물리적 특성과 질소산화물 제거에 관한 연구)

  • Hong, Chong-Hyun;Kim, Moon-Hoon;Ryu, Seong-Pil;Choung, Kwang-Ok
    • Journal of Environmental Science International
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    • v.15 no.5
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    • pp.431-438
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    • 2006
  • The strength, water permeability, and photo-degradation efficiency of NOx of porous concrete with a new concept were studied in this paper. The porous concrete was comprised of coarse aggregate of maximum size 40 mm, cement, silica fume, water and air-entraining(AE) water reducing agent. The strength of porous concrete was strongly related to its matrix proportion and compaction energy. An experimental test was carried out to study the parameters of cement proportions and silica fume content for pavement applications of porous concrete which were paving a footpath, a bikeway, a parking lot, and a driveway. The regressed equations of relation-ships between compressive strength and flexural strength, and coefficient permeability and void ratios were indicated as y=7.69x+71.74 and $y=0.42e^{0.28x}$. A method of making an air purification-functioning road, which was spraying a mixture of a photocatalyst, cement, and water onto the surface of the road, was suggested.

Analysis of Environment Emission Characteristics Each Construction Type for Road Field (국도건설공사 도로분야의 공종별 환경부하량 특성분석)

  • Kim, Sang-Ryong;Lee, Dong-Eun;Kim, Byung-Soo
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.37 no.1
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    • pp.143-151
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    • 2017
  • Recently Korea has presented carbon emission reduce goal of 37% compare to BAU until 2030 according to Paris Agreement in order to correspond to climate change. For this, researchers need to study positively on construction industry that emit $CO_2$ of $3^{rd}$ volume of 28 industry classification. This study calculated environmental load by LCA using the road part except tunnel and bridge among national road cases completed already. After selecting representative type of large construction type based on environmental emission, earth works, drainage works and paving works took up 84%. And this study analyzed the environmental emission feature of each detail construction type after selecting representative type each detail construction type. Utilization of each construction type emission attribute to environmental load during national road construction, will be helpful in making decision of eco-friendly national road construction based on environmental emission.

Development and Evaluation of the Road Energy Harvester According to Piezoelectric Cantilever Structure and Vehicle Load Transfer Mechanism (압전 캔틸레버 구조와 차량하중 전달방법에 따른 도로용 에너지 하베스터의 설계 및 평가)

  • Kim, Chang-Il;Kim, Kyung-Bum;Jeong, Young-Hun;Lee, Young-Jin;Cho, Jeong-Ho;Paik, Jong-Hoo;Kang, In-Seok;Lee, Moo-Yong;Choi, Beom-Jin;Park, Shin-Seo;Cho, Young-Bong;Nahm, Sahn
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.25 no.10
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    • pp.773-778
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    • 2012
  • A road energy harvester was designed and fabricated to convert mechanical energy from the vehicle load to electrical energy. The road energy harvester is composed of 16 piezoelectric cantilevers. We fabricated prototypes using a vehicle load transfer mechanism. Applying a vehicle load transfer mechanism rather than directly installing energy harvesters under roads decreases the area of road construction and allows more energy harvesters to be installed on the side of the road. The power generation amount with respect to the vehicular velocity change was assessed by installing the vehicle load transfer mechanism form and underground form. The energy harvester installed in the underground form generated power of 4.52 mJ at the vehicular velocity of 50 km/h. Also, power generation of the energy harvester installed in the vehicle load transfer mechanism form was 48.65 mJ at the vehicular velocity of 50 km/h.

Applicability Evaluation of FMCW Radar Detector on Signal Intersections (FMCW 레이더 검지기 신호교차로 적용성 평가)

  • Ko, Kwang-Yong;Kim, Min-Sung;Lee, Choul-Ki;Jeong, Jun-Ha;Heo, Nak-Won
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.14 no.1
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    • pp.1-12
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    • 2015
  • Intrusive Vehicle Detectors have excellent detection performance compared to other types of detector, but disadvantages of high installation and maintenance costs, short life time due to greater damage to roads and paving materials. In contrast, Non-Intrusive Vehicle Detectors attached to the stationary pole have advantages because it does not damage the road surface and easy and less expensive to maintain. Despite these advantages, Non-Intrusive type detectors are still not been widely used in traffic signal control systems because of the low detection performance. In this study, a FMCW(Frequency Modulated Continuous Wave) radar Vehicle Detector was designed as an alternative detector for the signalized intersection, and the performance evaluation was presented by purpose applicability.

Rutting Potential Evaluation of Asphalt Mixtures by Repeated-Load Creep Test (반복하중 크리프시험에 의한 아스팔트 혼합물의 소성변형특성 평가)

  • Zhu L.Y.;Fwa T.F.
    • International Journal of Highway Engineering
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    • v.8 no.3 s.29
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    • pp.21-28
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    • 2006
  • Field or laboratory wheel tracking tests have been employed for the evaluation of the rutting potential of asphalt paving mixtures. Compared to field tests, laboratory wheel tracking tests are much less expensive and more manageable for most road projects. However, most test laboratories are not equipped to perform such tests because there does not exist any standard test procedure, and the required equipment is rather expensive. Futhermore, the size of test specimens and the relatively large quantity of test mixture required present difficulties for laboratory specimen mixing and compaction. This paper describes a project conducted to study the feasibility of replacing wheel tracking testsby a repeated-load creep test for rutting potential evaluation. Comparisons were made between the results of the two tests for different test temperatures, loading speeds and applied pressures. Three types of asphalt mixtures were studied in the test program. Favorable conclusions concerning the use of the repeated-load test for rutting potential evaluation were drawn based on the findings of the experimental test results. The correlation between the two types of tests was found to be good for all threeasphalt mixtures. Adopting the repeated-load creep test would lead to cost savings since it employs standard test equipment already available in most laboratories. It would also result in substantial time savings due to the much smaller quantity of mix needed, and the ease in specimen preparation.

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Streetscape Design of Arroyo Parkway, Pasadena, California (아로요 파크웨이 조경설계)

  • Jeong Wook-Ju
    • Journal of the Korean Institute of Landscape Architecture
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    • v.32 no.4
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    • pp.105-117
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    • 2004
  • The Pasadena Freeway follows the Arroyo Seco through foothills and scenic passes to link Downtown Los Angeles with Pasadena. The approximately 10 mile road was the first freeway built in the West during the 1930's and is today designated as a Historic Parkway. As it approaches Pasadena, it terminates at a traffic light intersection at Glenarm Street, and then becomes a commercial road the Arroyo Parkway. This one and a quarter mile long, north south road moves significant volumes of traffic both into and out of Pasadena. The Arroyo Parkway is thus a major 'gateway' and an important axis of orientation and movement, terminating in the City's core civic, commercial and retail district. Planting, lighting, signage, paving, furnishing and fixtures ought to all be properly designed and coordinated to create a distinctive 'gateway' experience arriving to Pasadena and driving along the Arroyo Parkway. Alternate design studies, developed in discussion with City officials and others involved in the redevelopment of the area, would need to be done to properly decide on the best direction. Issues of heritage and traditional streetscape will likely have to be reconciled with both the reality of the vehicular character of the road and more contemporary themes. Obviously with such large parcels of property available in the Arroyo Fair Oaks corridor, there is a huge potential for redevelopment and building. This potential would only be strengthened by the Light Rail Line and its stations, the improvements to the Arroyo Parkway, and the redevelopment of the Arts Center College of Design. Guides and controls to the development process, including programming and physical design studies, would need to be developed in order to ensure that the maximum potential for the corridor be realized. This concept proposal suggests that the whole strip might be developed as a Arts and Technology corridor, with special emphases on education, public culture, media and lifestyle. The full programming possibilities need to be further developed. Additionally, appropriate urban design guidelines to ensure high quality development also need to be incorporated into an overall development plan.