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      Performance Characterization of Hot Mix Asphalt with High RAP Content and Basalt Fiber

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          Abstract

          Incorporating reclaimed asphalt pavement (RAP) into asphalt mixtures achieves astonishingly environmental and economic benefits. However, there is hesitation to use higher RAP content due to the concern regarding the deterioration in pavement performance, especially the cracking resistance. Basalt fiber has been considered an effective additive to reinforce the performance of asphalt mixtures and, subsequently, the reinforcement effect is also expected for high-RAP content mixtures. Therefore, this study investigated the effect of basalt fiber on the pavement performance of asphalt mixtures with 0%, 30%, 40%, and 50% RAP contents against high-temperature performance, moisture susceptibility, low-temperature and intermediate-temperature cracking resistance, based on the wheel-tracking test, the uniaxial penetration test, the freeze-thaw splitting test, the low-temperature bending beam test, the semicircular bend fracture test and the indirect tensile asphalt cracking test, respectively. In addition, a performance-space diagram was developed to determine the mixture performance shift caused by basalt fiber. The results showed that adding basalt fiber compensated for the detrimental effect caused by RAP, leading to significant enhancement in moisture susceptibility and low- and intermediate-temperature cracking resistance of mixtures with high RAP content, along with the enhancement in high-temperature performance, indicating that basalt fiber can contribute to the use of high RAP content.

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          Characterization of asphalt mastics reinforced with basalt fibers

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            Application of rejuvenators to improve the rheological and mechanical properties of asphalt binders and mixtures: A review

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              Mechanical performance of fibers in hot mix asphalt: A review

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                15 July 2020
                July 2020
                : 13
                : 14
                : 3145
                Affiliations
                [1 ]College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China; zgwu@ 123456yzu.edu.cn (Z.W.); Zhangchenyzu@ 123456126.com (C.Z.); libo@ 123456yzu.edu.cn (B.L.); ahkang@ 123456yzu.edu.cn (A.K.)
                [2 ]Research Center for Basalt Fiber Composite Construction Materials, Yangzhou University, Yangzhou 225127, China
                Author notes
                [* ]Correspondence: pengxiao@ 123456yzu.edu.cn ; Tel.: +86-514-8797-8669
                Article
                materials-13-03145
                10.3390/ma13143145
                7412359
                32679680
                18429456-b6e1-4639-9e1a-23bd4ea5b7ee
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 21 June 2020
                : 09 July 2020
                Categories
                Article

                asphalt mixtures,rap,basalt fiber,rutting,cracking,moisture susceptibility

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