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热氧老化模式对木质素改性沥青结合料流变性能及相容性的动态剪切流变仪研究

Effect of Thermal Oxygen Aging Mode on Rheological Properties and Compatibility of Lignin-Modified Asphalt Binder by Dynamic Shear Rheometer.

作者信息

Cai Meng, Zhao Xun, Han Xuanzhen, Du Peng, Su Yi, Cheng Cheng

机构信息

School of Civil Engineering, Southwest Forestry University, Kunming 650224, China.

Shuicheng Highway Administration of Guizhou Province, Shuicheng 553000, China.

出版信息

Polymers (Basel). 2022 Aug 30;14(17):3572. doi: 10.3390/polym14173572.

DOI:10.3390/polym14173572
PMID:36080649
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9460393/
Abstract

Lignin is abundant in nature. The use of lignin in the asphalt pavement industry can improve pavement performance while effectively optimizing pavement construction costs. The purpose of this paper is to study the effect of lignin on the anti-aging properties of asphalt. Commercial lignin was selected to prepare a lignin-modified asphalt binder. The properties of lignin-modified asphalt were studied by rheological experiments. The high-temperature rheological properties of two kinds of base asphalt and modified asphalt samples with different contents of lignin under three conditions of original, rolling thin film oven (RTFO) aging, and pressure aging vessel (PAV) were tested and analyzed with temperature sweep, frequency sweep, and multiple stress creep recovery (MSCR) tests. By comparing the variation laws of evaluation indicators, such as complex shear modulus *, phase angle , anti-aging index, cumulative strain, and viscous component G, we found that lignin could effectively improve the high-temperature stability of base asphalt, but it had a negative impact on the compatibility issues of base asphalt. Meanwhile, lignin played a filling role in the base asphalt, and the increase in viscosity was the fundamental reason for improving the high-temperature stability of the base asphalt. The research results indicated that lignin could effectively improve the anti-aging performance of asphalt and play a positive role in prolonging the service life of pavement.

摘要

木质素在自然界中含量丰富。在沥青路面行业中使用木质素可以提高路面性能，同时有效优化路面建设成本。本文旨在研究木质素对沥青抗老化性能的影响。选用商业木质素来制备木质素改性沥青结合料。通过流变学实验研究了木质素改性沥青的性能。采用温度扫描、频率扫描和多重应力蠕变恢复（MSCR）试验，对两种基质沥青以及不同木质素含量的改性沥青样品在原样、旋转薄膜烘箱（RTFO）老化和压力老化容器（PAV）三种条件下的高温流变性能进行了测试和分析。通过比较复数剪切模量*、相位角、抗老化指数、累积应变和粘性成分G等评价指标的变化规律，发现木质素能有效提高基质沥青的高温稳定性，但对基质沥青的相容性问题有负面影响。同时，木质素在基质沥青中起到填充作用，粘度增加是提高基质沥青高温稳定性的根本原因。研究结果表明，木质素能有效提高沥青的抗老化性能，对延长路面使用寿命起到积极作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/169d/9460393/a8da48570cab/polymers-14-03572-g011a.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/169d/9460393/54c58f6a9356/polymers-14-03572-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/169d/9460393/a8da48570cab/polymers-14-03572-g011a.jpg

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本文引用的文献

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Polymers (Basel). 2021 Mar 29;13(7):1083. doi: 10.3390/polym13071083.
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Recent advances in green hydrogels from lignin: a review.木质素基绿色水凝胶的最新进展：综述
Int J Biol Macromol. 2015 Jan;72:834-47. doi: 10.1016/j.ijbiomac.2014.09.044.
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Characterization of the radical scavenging activity of lignins--natural antioxidants.木质素——天然抗氧化剂的自由基清除活性表征
Bioresour Technol. 2004 Dec;95(3):309-17. doi: 10.1016/j.biortech.2004.02.024.