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含高再生沥青量的沥青混合料和胶浆的抗疲劳性能

Fatigue Resistance of Bituminous Mixtures and Mortars Containing High Reclaimed Asphalt Content.

作者信息

Margaritis Alexandros, Jacobs Geert, Pipintakos Georgios, Blom Johan, Van den Bergh Wim

机构信息

EMIB Research Group, University of Antwerp, 2020 Antwerp, Belgium.

Belgian Road Research Center, 1200 Brussels, Belgium.

出版信息

Materials (Basel). 2020 Dec 12;13(24):5680. doi: 10.3390/ma13245680.

DOI:10.3390/ma13245680
PMID:33322759
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7764449/
Abstract

With the increased use of reclaimed asphalt (RA), the ability of bituminous materials to resist fatigue cracking may face a decline mainly due to the aged reclaimed asphalt binder (RAB), especially when RA is used at higher rates and not sufficiently treated. In this study, the bulk scale (asphalt) and its subscale (mortar) were employed to evaluate the effect on fatigue resistance when a RAB is added, by considering three replacement rates: 0%, 40%, and 70% RAB. The fatigue testing of asphalt mixtures was carried out using a four-point bending (4PB) setup, while the mortars were tested using a new column-like geometry utilising a dynamic shear rheometer (DSR). The fatigue properties were further analysed using dissipated energy concepts. The aim of this study was, first, to assess whether the inclusion of a RAB can provide at least similar fatigue properties compared to an all-virgin mix, and second, to evaluate whether the proposed treatment is beneficial for the mixtures with a RAB. The asphalt tests revealed that the inclusion of a 40% RAB led to increased fatigue resistance, whereas the mortar tests showed that the inclusion of RAB has an inverse effect on fatigue life.

摘要

随着再生沥青（RA）使用量的增加，沥青材料抵抗疲劳开裂的能力可能会下降，这主要是由于老化的再生沥青结合料（RAB），特别是当RA的使用比例较高且未得到充分处理时。在本研究中，通过考虑三种替代率：0%、40%和70%的RAB，采用整体尺度（沥青）及其子尺度（胶浆）来评估添加RAB时对疲劳抗性的影响。沥青混合料的疲劳试验使用四点弯曲（4PB）装置进行，而胶浆则使用利用动态剪切流变仪（DSR）的新型柱状几何形状进行测试。使用耗散能量概念进一步分析疲劳性能。本研究的目的，首先是评估与全原生混合料相比，添加RAB是否能提供至少相似的疲劳性能，其次是评估所提出的处理方法对含RAB的混合料是否有益。沥青试验表明，添加40%的RAB会提高疲劳抗性；而胶浆试验表明，添加RAB对疲劳寿命有相反的影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/7ed033f3802f/materials-13-05680-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/5d426be81d7c/materials-13-05680-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/a05a42286ef3/materials-13-05680-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/299ec24803e8/materials-13-05680-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/3104eca3fe9b/materials-13-05680-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/7ed033f3802f/materials-13-05680-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/5b833163dc41/materials-13-05680-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/c210090d1ffc/materials-13-05680-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/2ad0e73a9ff2/materials-13-05680-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/5d426be81d7c/materials-13-05680-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/a05a42286ef3/materials-13-05680-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/299ec24803e8/materials-13-05680-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dd1b/7764449/7ed033f3802f/materials-13-05680-g013.jpg

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废食用油预脱硫胶粉制备再生沥青的疲劳性能研究
Polymers (Basel). 2023 Jan 31;15(3):740. doi: 10.3390/polym15030740.
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Special Issue "Sustainable Asphalt Pavements: Materials, Design Methods, and Characterization Techniques" (First and Second Volumes).特刊“可持续沥青路面：材料、设计方法和表征技术”（第一卷和第二卷）。
Materials (Basel). 2022 Oct 31;15(21):7649. doi: 10.3390/ma15217649.