Print Email Facebook Twitter A Temperature-Independent Methodology for Polymer Bitumen Modification Evaluation Based on DSR Measurement Title A Temperature-Independent Methodology for Polymer Bitumen Modification Evaluation Based on DSR Measurement Author Wu, Jiantao (Hohai University) Wang, Haoan (Hohai University) Liu, Quan (Hohai University) Gao, Y. (TU Delft Pavement Engineering) Liu, Shengjie (Hohai University) Date 2022 Abstract Owing to the continuous increase of traffic loads, bitumen modification has been manifested as an efficient methodology to enhance asphaltic pavement performance. Currently, the modification index, defined as the ratio of mechanical properties (e.g., complex modulus) before and after bitumen modification, is extensively adopted to evaluate the modification degree. However, bituminous materials behave as temperature-dependent, which indicates that the mechanical property varies with measured temperatures. As a result, the calculated modification index also shows temperature-dependent property, which inhibits the use of modification index. For this reason, this study introduced a method to eliminate the temperature-dependency of the modification index. In specific, a mathematical model considering the properties of modifiers was firstly established to predict the modification index-temperature curve (MI-T curve). In what follows, the temperature-dependency of modification index was analyzed to verify the proposed model on three types of modifiers, which were graphene, Styrene-Butadiene-Styrene (SBS), and Ethyl-Vinyl-Acetate (EVA), respectively. The results indicated that the developed model could efficiently predict the MI-T curves. Besides, the effective modification area (EMA) and optimal modification index (OMI) were two reasonable indicators that evaluate the bitumen modification without considering the temperature-dependency. Subject bitumen modificationtemperature-independencycomplex modulusdynamic shear rheometereffective modification areaoptimal modification index To reference this document use: http://resolver.tudelft.nl/uuid:3ae1b593-eb7a-4c6c-9a93-c6dfed14c389 DOI https://doi.org/10.3390/polym14050848 ISSN 2073-4360 Source Polymers, 14 (5) Part of collection Institutional Repository Document type journal article Rights © 2022 Jiantao Wu, Haoan Wang, Quan Liu, Y. Gao, Shengjie Liu Files PDF polymers_14_00848.pdf 686.04 KB Close viewer /islandora/object/uuid:3ae1b593-eb7a-4c6c-9a93-c6dfed14c389/datastream/OBJ/view