Assessment of the effect of straw lignin-based synthetic resin as a modifier on the rheological properties of asphalt binder towards better utilization of straw biomass

IF 1.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Multidiscipline Modeling in Materials and Structures Pub Date : 2023-05-15 DOI:10.1108/mmms-09-2022-0179
Yiming Li, Chenyang Lv
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Abstract

PurposeTo extend the reuse method and rate of straw biomass, this paper investigated the effect of lignin synthetic phenolic resin (LPF) on the rheological properties of asphalt binder.Design/methodology/approachFour LPFs with 25%, 50%, 75% and 100% substitution rates were prepared by replacing phenol with lignin in synthetic resins and using it as a modifier to prepare a bio-asphalt binder. Temperature sweep tests were conducted to evaluate aging resistance and temperature sensitivity of the bio-asphalt binder. The rutting resistance of the bio-asphalt binder was evaluated by frequency sweeps and multiple stress creep recovery (MSCR) test. Linear amplitude sweep (LAS) tests were conducted to evaluate the fatigue resistance of the bio-asphalt binder. A master curve was constructed to further analyze the rheological properties of the bio-asphalt binder at different frequencies. The low-temperature cracking resistance of the binder was evaluated by G-R parameters, critical temperatures and ΔTc. Fourier transform infrared spectroscopy (FTIR) was performed to investigate the changes in the functional groups of the binder before and after aging.FindingsThe results indicated that adding LPF could improve the high-temperature rutting resistance, fatigue resistance, aging resistance of asphalt and the binders are less affected by temperature. Additionally, LPF slightly prohibited the low-temperature performance of the asphalt binder, which, however, was significantly lower than the base asphalt degradation during aging. Compared with base asphalt binders, the bio-asphalt binder showed no new absorption peaks generated after adding LPF, identifying that the improved asphalt binder performance by LPF was a mainly physical modification.Originality/valueThe main objective of this paper is to further improve the substitution rate (i.e. the mass substitution ratio of lignin to phenol) of lignin and broaden the application of biomass resins, thus realizing resource sustainability.
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评价秸秆木质素基合成树脂作为改性剂对沥青粘结剂流变特性的影响,以更好地利用秸秆生物质
目的研究木质素合成酚醛树脂(LPF)对沥青粘结剂流变学性能的影响,以扩大秸秆生物质的再利用方式和利用率。设计/方法/途径用木质素代替合成树脂中的苯酚,制备了四种取代率分别为25%、50%、75%和100%的生物沥青粘合剂。通过温度扫描试验对生物沥青粘结剂的抗老化性能和温度敏感性进行了评价。采用频率扫描和多重应力蠕变恢复(MSCR)试验对生物沥青粘结剂的抗车辙性能进行了评价。采用线性振幅扫描(LAS)试验对生物沥青粘结剂的抗疲劳性能进行了评价。构建了主曲线,进一步分析了不同频率下生物沥青粘结剂的流变特性。通过G-R参数、临界温度和ΔTc对粘结剂的低温抗裂性能进行了评价。利用傅里叶变换红外光谱(FTIR)研究了老化前后粘结剂官能团的变化。结果表明:掺加LPF可提高沥青的耐高温车辙性、耐疲劳性、耐老化性,且受温度影响较小;此外,LPF略微抑制了沥青粘结剂的低温性能,但明显低于基础沥青老化过程中的降解。与基础沥青粘结剂相比,生物沥青粘结剂在加入LPF后没有产生新的吸收峰,说明LPF对沥青粘结剂性能的改善主要是物理改性。本文的主要目的是进一步提高木质素的替代率(即木质素对苯酚的质量替代比),扩大生物质树脂的应用范围,从而实现资源的可持续性。
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来源期刊
CiteScore
3.70
自引率
5.00%
发文量
60
期刊介绍: Multidiscipline Modeling in Materials and Structures is published by Emerald Group Publishing Limited from 2010
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