• Title/Summary/Keyword: asphalt concrete mixture

Search Result 105, Processing Time 0.024 seconds

Mix Design for Waste PE Films Modified Asphalt Concrete (농업용 폐비닐로 개질한 아스팔트 콘크리트의 배합설계)

  • 김광우;이상범;오성균;고동혁;정승호
    • Proceedings of the Korean Society of Agricultural Engineers Conference
    • /
    • 1999.10c
    • /
    • pp.313-318
    • /
    • 1999
  • This study is basic research to improve quality of asphalt concrete mixture, to preserve environment, and to recycle waste vinly. The mixing method and proper content of waste vinyl were determined through preliminary mix design. This study performed mix designs using 2 type gradations of aggregate in addtion content of wate vinly. Marshall stability at optimum asphalt content of asphalt concrete mixture addtin wate vinly was satisfied with the specification of the Ministry of Construction and Transportation , and its values indicated that dense grade asphalt concrete mixture containing waste vinyl were higher than common dense grade mixture (control). From this study, it was confirmed that addtion of waste vinyl improved quality of asphalt concrete mixture.

  • PDF

The Study of Asphalt Concrete Mixture Design Using Maximum Density Theory (최대밀도이론을 이용한 아스팔트 혼합물의 배합설계에 관한 연구)

  • Lee, Seung-Han;Park, Hyun-Myo;Jung, Yong-Wook;Jang, Seck-Soo;Kim, Jang-Wook
    • Proceedings of the Korea Concrete Institute Conference
    • /
    • 2005.05b
    • /
    • pp.525-528
    • /
    • 2005
  • This study determines the best composite grade to minimize the void of aggregate mixture based on the maximum density theory in an attempt to suggest a mix proportion method design for asphalt mixtures. Study results show that the grading curve with the maximum mass per unit capacity of each aggregate mixture satisfied the KS standards and the optimum AP content to meet the optimal asphalt mixture void rate of 4$\%$ was 5.7$\%$, less than the optimum AP content of 6.5$\%$ suggested in the Marshal mix proportion method design. At the same time, the asphalt mixture produced based upon the suggested mix proportion method had a flow value 17$\%$ lower than that of asphalt mixture produced according to the Marshal method, while its density was greater by 0.06$\~$0.09. This suggests that the introduced mix proportion method design helps to improve the shape flexibility and crack-resistance of asphalt concrete.

  • PDF

Evaluation of Asphalt Mixtures Using Waste vinyl (폐비닐 아스팔트 콘크리트 혼합물의 특성(구조 및 재료 \circled2))

  • 김광우;이상범;도영수
    • Proceedings of the Korean Society of Agricultural Engineers Conference
    • /
    • 2000.10a
    • /
    • pp.259-265
    • /
    • 2000
  • This study is a fundamental research for recycling waste vinyl in asphalt concrete mixture for roadway pavement. The mixing method and proper content of waste polyethylene(PE) film were determined through preliminary mix design. This study was performed mix designs using 2 type graduations of aggregate and used two types waste PE film. The asphalt concrete mixture was satisfied with the specification of the Ministry of Construction and Transportation. Its showed that dense grade asphalt concrete mixture containing waste vinyl were higher performance in comparision to other mixtures(common dense grade mixture and gap grade mixtures). From results of this study, it was confirmed that addition of waste vinyl improved on quality of asphalt concrete mixture.

  • PDF

An Evaluation of Mechanical Characteristics of Modified Asphalt Concrete Mixture (개질아스팔트 콘크리트 혼합물의 기계적 특성평가)

  • Kim, Nakseok;Bang, Sanyoung
    • Journal of the Society of Disaster Information
    • /
    • v.7 no.1
    • /
    • pp.32-42
    • /
    • 2011
  • Many researches have been conducted to evaluate the performance of modified asphalt concrete mixtures. The research was conducted to estimate the laboratory mechanical characteristics of Elvaloy-modified asphalt concrete mixture. To achieve its intended objective, indirect tensile test and resilient modulus test were performed. The rest results revealed that indirect tensile strengths and resilient moduli of the Elvaloy-modified asphalt concrete mixture were higher than those of the conventional dense-graded. As a result, within the limits of the tests conducted in this research, it is predicted that the performance and stability of the Elvaloy-modified asphalt concrete mixture are better than that of the conventional dense-graded one.

Fatigue Resistance of Fiber-Reinforced Asphalt Concrete in Flexible Pavement (연성포장용 섬유보강 아스팔트 콘크리트의 피로저항성)

  • Kim, Nak-Seok;Choo, Sang-Hyuk;Lee, Suck-Hong
    • Journal of the Korean Society of Hazard Mitigation
    • /
    • v.2 no.3 s.6
    • /
    • pp.79-88
    • /
    • 2002
  • The main purpose of this paper is to evaluate the possibility of improvement in fatigue resistance of asphalt concrete mixture using the industrial waste material of K fiber. In this research, as an experimental equipment, the MTS with Closed-Loop Servohydraulic System was used and it was designed according to the U.S. standard testing procedure of ASTM D 4123. According to the test results, the optimum content of fiber with the length of 8mm was about 0.2 percent of total mixture weight. The optimum asphalt content for the fiber-reinforced asphalt concrete was about 5.5 percent of total mixture weight. Fatigue resistance of fiber-reinforced asphalt concrete was noticeable compared to the conventional dense-graded 20 asphalt concrete. In addition, the resilient moduli of fiber-reinforced asphalt mixture were $1.15{\sim}1.18$ times higher than those of conventional asphalt concrete.

The Recycling of Waste Asphalt Concrete Mixfure Using a Movable Asphalt Recycling Machine (이동형 아스팔트 재생기를 이용한 페아스팔트 콘크리트 혼합물의 재활용)

  • 박승범;조청휘;김정환
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.1 no.2
    • /
    • pp.75-83
    • /
    • 2000
  • Recently, the quantities of waste asphalt concrete at construction sites have much increased greatly. but maintaining a filling-up and final disposal place is a difficult problem. Therefore, we are faced with a worsening environmental problem brought about present illegal measures. So, safety treatment and recycling of construction waste is a very important question in the Preservation of environmental and natural resources In this study we performed fundamental investigation to manufacture the base recycling asphalt mixture by movable asphalt recycling machine. It contained waste asphalt concrete and recycling agent and its quality was equal to virgin asphalt concrete.

  • PDF

Effect of Moisture and Freeze-Thaw on Mechanical Properties of CRM Asphalt Mexture (폐타이어 재활용 아스팔트 혼합물의 기계적 성질에 대한 습윤과 동결 융해의 영향)

  • 김낙석;조기주
    • Resources Recycling
    • /
    • v.9 no.3
    • /
    • pp.37-45
    • /
    • 2000
  • This paper presents the experimental test results on moisture and freeze-thaw resistance of hot mix crumb rubber modified (CRM) asphalt concrete mixture. To compare the differences in mechanical properties of conventional and CRM asphalt concretes, various tests were conducted under different moisture conditions and freeze-thaw cycles. Marshall mix design was also performed to determine the optimum asphalt contents for the both asphalt concrete mixtures. Test results revealed that the moisture and freeze-thaw resistance of CRM asphalt mixture was superior to the conventional asphalt concrete. As a result, it is considered that the utilization of waste tires in asphalt pavements has the potential of minimizing the damage due to the moisture and freeze-thaw.

  • PDF

A Study on Field Applications of Polymer-Modified Warm Asphalt Concrete Mixture using Admixture (첨가제를 이용한 중온형 폴리머 개질 아스팔트 콘크리트 혼합물의 실용화 연구)

  • Kim, Nak-seok;Lee, Jin-goo;Park, Seok-soon
    • Journal of the Society of Disaster Information
    • /
    • v.6 no.1
    • /
    • pp.28-43
    • /
    • 2010
  • This paper presents the field applications of polymer-modified warm asphalt mixture which can reduce the temperature during the production and field constructions. The amount of fuel consumptions and $CO_2$ diffusions can be reduced by much using the polymer-modified warm asphalt mixture instead of the conventional polymer-modified asphalt mixture. According to the research results, the polymer-modified warm asphalt mixture can be utilized without additional temperature increasement and performance sacrifice during the plant production and public service, respectively. As a result, it is considered that the application of the polymer-modified warm asphalt mixture has the potential of convenience in constructions management and reducing the environmental damages.

Evaluation of the Properties of a Hot In-Placement Recycled Asphalt Mixture as an Adding Mixer (믹싱기 추가에 따른 현장가열 재생 아스팔트 혼합물의 물성평가)

  • Lee, Kanghun;Park, Jaeyoung;Lee, Hwasun;Kim, Yongjoo;Lee, Jaejun
    • International Journal of Highway Engineering
    • /
    • v.20 no.1
    • /
    • pp.97-105
    • /
    • 2018
  • PURPOSES : Asphalt concrete pavement is damaged by various causes such as traffic and environmental loads. The distressed pavement should be maintained by various methods to provide a comfortable and safe pavement for the driver. This study evaluates the effect of adding a mixing procedure to enhance the mixture quality in the hot in-placement recycled asphalt pavement method, which is an asphalt-pavement maintenance method. METHODS : Various test methods such as Marshall stability and dynamic stability, were employed to estimate the recycled asphalt mixture with and without an additional mixing, using the hot in-placement recycled asphalt pavement method. RESULTS : The mixture samples used in this study were taken before and after the addition of the mixer in the hot in-placement recycled asphalt pavement method (HIR) at field construction sites in GongJu and JinJu in South Korea. The test results of both mixtures satisfied the asphalt-mixture standard specifications. CONCLUSIONS : This study confirmed that adding a mixer in the HIR method results in a well-mixed new asphalt mixture, rejuvenator, and reclaimed asphalt mixture.

Experimental Study for Determination of Optimum Waste Vinyl Contents in Asphalt Concrete (아스팔트 콘크리트에 적정 폐비닐 첨가량 결정에 관한 실험적 연구)

  • 김광우;김주인;이순제;최선주
    • Magazine of the Korean Society of Agricultural Engineers
    • /
    • v.44 no.5
    • /
    • pp.88-95
    • /
    • 2002
  • This study is a fundamental research for recycling waste vinyl (WV) in asphalt mixture for improving roadway pavement. Mix design was conducted by WV content and optimum asphalt content (OAC) was determined for dense-graded surface course mixture. Marshall stability test, indirect tensile strength (ITS) test and wheel tracking test were carried out to measure the characteristics of WV-added asphalt concretes. From the results of this study, recycling WV in asphalt mixture is possible. However, as WV content increased, melted WV clustering appeared in asphalt mixture. It could be considered that adding too much WV in asphalt mixture is not proper. The proper content of LDPE and HDPE WV was appeared to be 12% and 8%, respectively.