生物质酚油在不同老化条件下对沥青胶结料再生效率的实验室评估

IF 3.4 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Materials and Structures Pub Date : 2024-08-12 DOI:10.1617/s11527-024-02434-7
Peixin Xu, Qisheng Hu, Jinbiao Tang, Derun Zhang, Zhenzhen Cai, Shangxian Xie
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引用次数: 0

摘要

再生剂对于恢复使用高剂量再生沥青路面(RAP)材料生产的再生沥青路面的性能至关重要。本研究提出了一种新型再生剂--从生物质热解中回收的生物质衍生酚油(BDPO)。系统研究了其在三种实验室老化条件下(包括轧制薄膜炉(RTFO)老化、压力老化容器(PAV)老化和紫外线(UV)辐射老化)对沥青胶结料的再生效率和机理。首先通过气相色谱-质谱(GC-MS)分析确定了 BDPO 的化学成分。随后,使用典型的物理流变特性测试对实验室老化沥青胶结料的再生效率进行了评估,并与两种商用再生剂进行了比较。傅立叶变换红外光谱(FTIR)测试最终揭示了 BDPO 的再生机理。结果表明,BDPO 可以平衡不稳定的胶体结构,恢复老化沥青胶结料的物理流变性能,对于在 RTFO、PAV 和 UV 老化条件下老化的所选沥青胶结料,其最佳添加量分别为 1.5%、3% 和 8%。与商用再生剂相比,BDPO 再生沥青在抗高温车辙、抗疲劳开裂和抗低温开裂方面的性能与未老化沥青相似。傅立叶变换红外光谱显示,使用 BDPO 使老化沥青粘结剂恢复活力的过程涉及复杂的化学反应,有利于减轻老化程度。这些发现证实了 BDPO 作为再生沥青路面再生剂的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Laboratory evaluation of the rejuvenation efficiency of biomass-derived phenolic oil on the asphalt binder with various aging conditions

Rejuvenators are critical for restoring the performance of recycled asphalt pavement produced with a high dosage of reclaimed asphalt pavement (RAP) materials. In this study, a biomass-derived phenolic oil (BDPO) recycled from biomass pyrolysis was proposed as a novel rejuvenating agent. Its rejuvenation efficiency and mechanism on the asphalt binder aged with three laboratory-aging conditions, including the rolling thin-film oven (RTFO) aging, pressure aging vessel (PAV) aging, and ultraviolet (UV) radiation aging, were investigated systemically. The chemical components of BDPO were first identified through the Gas-Chromatography-Mass Spectrometry (GC–MS) analysis. The rejuvenation efficiency was subsequently evaluated on the laboratory-aged asphalt binders using typical physical-rheological properties tests and compared with two commercial rejuvenators. The rejuvenation mechanism of BDPO was finally revealed by the Fourier Transform Infrared Spectroscopy (FTIR) test. Results indicated that the BDPO can balance the unstable colloidal structure and restore the physical-rheological properties of aged asphalt binders, whose optimal dosages were determined as 1.5%, 3%, and 8% for the selected asphalt binder aged under RTFO, PAV, and UV aging conditions, respectively. Compared with commercial rejuvenating agents, the BDPO-rejuvenated asphalt exhibits performance properties similar to those of unaged asphalt in terms of high-temperature rutting resistance, fatigue cracking resistance, and low-temperature cracking resistance. FTIR spectra identified that the rejuvenation process of aged asphalt binders using BDPO involves complicated chemical reactions, which are beneficial to alleviate the aging degrees. These findings confirm the potential of BDPO as a promising rejuvenator for recycled asphalt pavements.

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来源期刊
Materials and Structures
Materials and Structures 工程技术-材料科学:综合
CiteScore
6.40
自引率
7.90%
发文量
222
审稿时长
5.9 months
期刊介绍: Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.
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