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首页> 外文期刊>Journal of Cleaner Production >Quantitative characterize binder blending and diffusion in recycled asphalt mixture: An environmental-friendly solution using wooden cube and 3D fluorescence image technology
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Quantitative characterize binder blending and diffusion in recycled asphalt mixture: An environmental-friendly solution using wooden cube and 3D fluorescence image technology

机译：定量表征粘合剂混合和再循环沥青混合物中的扩散：使用木制立方体和3D荧光图像技术的环保解决方案

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摘要

Due to the undetermined extent of blending phenomena between virgin and reclaimed asphalt, the use of reclaimed asphalt pavement (RAP) is limited. Currently, there is no universally accepted method and uniform terms for the quantification of blending phenomena. To this end, this paper proposed a new method based on 3D fluorescence image technology (3D-FIT) by using laser scanning confocal microscope. Natural asphalt and wooden cube were used to prepare RAP under laboratory aging for specific needs, styrene-butadiene-styrene (SBS) as fluorescent particles from SBS modified asphalt were employed to trace and quantify the blending phenomena. Subsequently, the steps of standardized pretreatment on wooden cube were developed, such as correction of asphalt content, autofluorescence elimination, attenuation correction etc. Under this new method, two suggested parameters including degree of blending, homogenization coefficient were proposed, both of which depends on the fluorescence intensity decay function, homogenization coefficient was defined to describe the homogenization of virgin and reclaimed asphalt. Moreover, the concepts on degree of blending and degree of RAP binder mobilization were distinguished. Compared with existing methods, the combination of fluorescent particles and laser scanning confocal microscope (LSCM) can perform three-dimensional observation and quantitative characterization for blending phenomena. It also provides a new attempt to analyze and evaluate blending and diffusion on the interface between asphalt and aggregate.(c) 2021 Elsevier Ltd. All rights reserved.
机译：由于处于处女和再生沥青之间的混合现象的未确定程度，因此使用回收的沥青路面（RAP）是有限的。目前，没有普遍接受的方法和统一术语，用于量化混合现象。为此，本文采用激光扫描共聚焦显微镜提出了一种基于3D荧光图像技术（3D-FIT）的新方法。在实验室老化下使用自然沥青和木质立方体在实验室老化下制备用于特定需求的苯乙烯 - 丁二烯 - 苯乙烯（SBS）作为来自SBS改性沥青的荧光颗粒进行痕量并定量混合现象。随后，开发了在木质立方体上标准化预处理的步骤，例如校正沥青含量，自发荧光消除，衰减等，在这种新方法下，提出了两个包括混合程度，均质系数的两个建议参数，两者都取决于定义荧光强度衰减函数，均质化系数以描述原始和再生沥青的均质化。此外，区分了对混合程度的概念和拉特粘合剂动员程度。与现有方法相比，荧光粒子和激光扫描共聚焦显微镜（LSCM）的组合可以对混合现象进行三维观察和定量表征。它还提供了一种新的尝试，用于分析和评估沥青和聚合之间的界面上的混合和扩散。（c）2021 elestvier有限公司保留所有权利。

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