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不同老化处理下SBS/CRP复合改性沥青的流变性能

Rheological Properties of SBS/CRP Composite Modified Asphalt under Different Aging Treatments.

作者信息

Wu Shuhua, He Rui, Chen Huaxin, Li Wenke, Li Guanghui

机构信息

School of Civil Engineering and Architecture, Zhengzhou University of Aeronautics, Zhengzhou 450046, China.

School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China.

出版信息

Materials (Basel). 2020 Nov 2;13(21):4921. doi: 10.3390/ma13214921.

DOI:10.3390/ma13214921
PMID:33147755
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7663548/
Abstract

The objective of this study is to evaluate the rheological properties of SBS/CRP composite modified asphalt under different aging conditions in alpine cold regions. In this study, the styrene-butadiene-styrene (SBS) block copolymer, crumb rubber powder (CRP), softeners and various additives were used to prepare the SBS/CRP composite modified asphalt. The 4.5% SBS modified asphalt and SK90 virgin asphalt were also selected for comparing. The thin film oven test (TFOT) and pressure aging vessel (PAV) aging test were conducted to simulate the different aging conditions. The frequency sensitivity, high-temperature deformation resistance and low-temperature crack resistance of SBS/CRP composite modified asphalt under different aging conditions were studied by the dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test. The results show that the frequency sensitivity of SBS/CRP composite modified asphalt is the lowest. At low and medium temperatures, it has relatively low strength and good flexibility. The master curve of composite modulus for the unaged and aged SBS/CRP composite modified asphalt is in a cluster state. It has strong anti-aging capability, which is less affected by aging conditions. It also has a strong low-temperature relaxation ability, which can meet the requirements of performance at -24 °C in PG classification. The high-temperature deformation resistance of SBS/CRP composite modified asphalt is not much different from SBS modified asphalt's. Therefore, it can provide the basic support for the application in alpine cold regions under the conditions of low temperature, strong radiation and heavy load.

摘要

本研究的目的是评估在高寒地区不同老化条件下SBS/CRP复合改性沥青的流变性能。在本研究中，采用苯乙烯-丁二烯-苯乙烯（SBS）嵌段共聚物、胶粉（CRP）、软化剂及各种添加剂制备SBS/CRP复合改性沥青。还选用了4.5% SBS改性沥青和SK90基质沥青进行对比。通过薄膜烘箱试验（TFOT）和压力老化容器（PAV）老化试验模拟不同老化条件。采用动态剪切流变仪（DSR）和弯曲梁流变仪（BBR）试验研究了不同老化条件下SBS/CRP复合改性沥青的频率敏感性、高温抗变形能力和低温抗裂性能。结果表明，SBS/CRP复合改性沥青的频率敏感性最低。在中低温下，其强度相对较低，柔韧性良好。未老化和老化后的SBS/CRP复合改性沥青的复合模量主曲线呈聚类状态。其抗老化能力强，受老化条件影响较小。它还具有较强的低温松弛能力，能满足PG分级中-24℃性能要求。SBS/CRP复合改性沥青的高温抗变形能力与SBS改性沥青相差不大。因此，它可为在低温、强辐射和重载条件下在高寒地区的应用提供基础支撑。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/88d164819e4b/materials-13-04921-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/bc419862454a/materials-13-04921-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/e180c00aea5e/materials-13-04921-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/afd4c10c6c15/materials-13-04921-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/71175e1cb6fc/materials-13-04921-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/4126bc3bdeb4/materials-13-04921-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/88d164819e4b/materials-13-04921-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/bc419862454a/materials-13-04921-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/e180c00aea5e/materials-13-04921-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/afd4c10c6c15/materials-13-04921-g003a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/71175e1cb6fc/materials-13-04921-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/4126bc3bdeb4/materials-13-04921-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4337/7663548/88d164819e4b/materials-13-04921-g006.jpg

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本文引用的文献

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Temperature Sensitivity Characteristics of SBS/CRP-Modified Bitumen after Different Aging Processes.不同老化过程后SBS/CRP改性沥青的温度敏感性特征
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A review on using crumb rubber in reinforcement of asphalt pavement.
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Evaluation and Correlation Analysis of the Rheological Properties of Ground Tire Rubber and Styrene Butadiene Styrene Compound-Modified Asphalt.废轮胎橡胶粉与苯乙烯-丁二烯-苯乙烯共聚物复合改性沥青流变性能的评价与相关性分析
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