International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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Performance Evaluation of 100% RAP Asphalt Mixtures using Rapid-Setting Polymer-Modified Asphalt Emulsion for Spray Injection Application

스프레이 패칭 긴급보수용 개질 유화 아스팔트와 100% 순환골재를 사용한 상온 아스팔트 혼합물의 성능 평가

  • 임정운 (경희대학교 공과대학 도로연구실) ;
  • 권봉주 ((주)오에이티엠엔씨 연구개발) ;
  • 김두열 ((주)오에이티엠엔씨 연구개발) ;
  • 이상염 (인덕대학교 건설정보공학과) ;
  • 이석근 (경희대학교 공과대학 사회기반시스템공학과)
  • Received : 2016.02.29
  • Accepted : 2016.03.25
  • Published : 2016.04.14
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Abstract

PURPOSES: The objective of this study was to determine the optimum ratio of mix design, for a reclaimed asphalt pavement (RAP) content of 100%, for spray injection application. METHODS: A literature review revealed that spray injection is an efficient and cost-effective application for fixing small defective regions of an asphalt pavement. Rapid-setting polymer-modified asphalt mixtures prepared from two types of rapid-setting polymer asphalt emulsion were subjected to Marshall stability and wet track abrasion tests, in order to identify the optimum mix designs. RESULTS and CONCLUSIONS : Different mix designs of type A and type B emulsions were prepared using RAP and virgin aggregates, in order to compare the performance and determine the optimum mix design. The performance of mixtures prepared with RAP was superior to that of mixtures containing virgin aggregates. Moreover, for optimum ratio of the design, the binder content prepared from RAP was set to 1~2% lower than that consisting of virgin aggregates. Compared to their Type A counterparts, type B mixtures consisting of a reactive emulsion performed better in the Marshall stability and wet track abrasion tests. The initial results confirmed the advantages associated with using RAP for spray injection applications. Further studies will be performed to verify the difference in the optimum mix design and performance obtained in the lab-scale test and tests conducted at the job site by using the spray injection machine.

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  1. Development of a Spray-Injection Patching System and a Field Performance Evaluation of 100% RAP Asphalt Mixtures using a Rapid-Setting Polymer-Modified Asphalt Emulsion vol.20, pp.1, 2018, https://doi.org/10.7855/IJHE.2018.20.1.077