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Performance Evaluation of 100% RAP Asphalt Mixtures using Rapid-Setting Polymer-Modified Asphalt Emulsion for Spray Injection Application
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 Title & Authors
Performance Evaluation of 100% RAP Asphalt Mixtures using Rapid-Setting Polymer-Modified Asphalt Emulsion for Spray Injection Application
Lim, Jeong-un; Kwon, Bong Ju; Kim, Doo Youl; Lee, Sang Yum; Rhee, Suk Keun;
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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.
 Keywords
reclaimed asphalt pavement (RAP);cold recycling;asphalt emulsion;Marshall stability;wet track abrasion test;spray injection;
 Language
Korean
 Cited by
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