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无定形聚α-烯烃（APAO）和聚磷酸（PPA）对沥青结合料流变性能、相容性和稳定性的影响

Effects of Amorphous Poly Alpha Olefin (APAO) and Polyphosphoric Acid (PPA) on the Rheological Properties, Compatibility and Stability of Asphalt Binder.

作者信息

Pei Xiaoguang, Fan Weiyu

机构信息

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China.

出版信息

Materials (Basel). 2021 May 10;14(9):2458. doi: 10.3390/ma14092458.

DOI:10.3390/ma14092458
PMID:34068488
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8126048/
Abstract

High production costs and poor storage stability have become important constraints in the manufacture of modified asphalt binder. To simplify the production process and reduce the production cost, amorphous poly alpha olefin (APAO) and polyphosphoric acid (PPA) were applied to prepare highly stable modified asphalt binder. The influence of APAO/PPA on the temperature sensitivity, rheological property, storage stability, compatibility and microstructure of neat binder were studied by rotational viscosity (RV), dynamic shear rheometer (DSR), bending beam rheometer (BBR) and Fourier transform infrared (FTIR) spectroscopy. The results show that the incorporation of APAO/PPA reduced the temperature sensitivity of neat binder. The combined effect of APAO/PPA contributed to the improvement in deformation resistance, which was evidenced by the increase in failure temperature and percent recovery. However, the compound modification of APAO/PPA decreased the binder's low-temperature performance. APAO strengthened the fatigue resistance of the binder, while PPA reduced the anti-fatigue performance. Composite modified asphalt binder with superior storage stability could be prepared, which was confirmed by the desired Cole-Cole plots and fluorescence imaging. Furthermore, chemical and physical reactions occurred during the APAO/PPA modification process. Overall, 2 wt.% (weight percentage) APAO and 1.5 wt.% PPA are recommended for the production of modified asphalt binder with remarkable rheological performance and storage stability.

摘要

高生产成本和较差的储存稳定性已成为改性沥青结合料生产中的重要制约因素。为简化生产工艺并降低生产成本，采用非晶态聚α-烯烃（APAO）和多聚磷酸（PPA）制备了高稳定性改性沥青结合料。通过旋转粘度计（RV）、动态剪切流变仪（DSR）、弯曲梁流变仪（BBR）和傅里叶变换红外光谱（FTIR）研究了APAO/PPA对纯结合料的温度敏感性、流变性能、储存稳定性、相容性和微观结构的影响。结果表明，加入APAO/PPA降低了纯结合料的温度敏感性。APAO/PPA的综合作用有助于提高抗变形能力，这通过破坏温度和恢复百分比的增加得到证明。然而，APAO/PPA的复合改性降低了结合料的低温性能。APAO增强了结合料的抗疲劳性能，而PPA降低了抗疲劳性能。通过理想的Cole-Cole图和荧光成像证实，可以制备出具有优异储存稳定性的复合改性沥青结合料。此外，在APAO/PPA改性过程中发生了化学和物理反应。总体而言，推荐使用2 wt.%（重量百分比）的APAO和1.5 wt.%的PPA来生产具有优异流变性能和储存稳定性的改性沥青结合料。

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本文引用的文献

1
A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility.聚合物改性沥青基础综述：沥青/聚合物相互作用及相容性原理。
Adv Colloid Interface Sci. 2015 Oct;224:72-112. doi: 10.1016/j.cis.2015.07.010. Epub 2015 Aug 1.
2
The colloidal structure of bitumen: consequences on the rheology and on the mechanisms of bitumen modification.沥青的胶体结构：对流变学及沥青改性机理的影响
Adv Colloid Interface Sci. 2009 Jan 30;145(1-2):42-82. doi: 10.1016/j.cis.2008.08.011. Epub 2008 Sep 9.