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具有增强性能的聚硅氧烷改性沥青结合料的简便制备

Facile Preparation of Polysiloxane-Modified Asphalt Binder Exhibiting Enhanced Performance.

作者信息

Qian Jinhua, Dong Fuying, Chen Xiaohui, Xu Xianying, Zhang Dongkang, Li Fulong, Gao Yuxia, Sun Huadong, Pang Laixue, Tang Xinde, Wang Dengxu

机构信息

School of Traffic and Civil Engineering, Shandong Jiaotong University, Jinan 250357, China.

Institute of Intelligent Transportation, Shandong Jiaotong University, Jinan 250357, China.

出版信息

Polymers (Basel). 2023 Sep 17;15(18):3795. doi: 10.3390/polym15183795.

DOI:10.3390/polym15183795
PMID:37765649
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10536769/
Abstract

The development of polymer-modified asphalt (asphalt = asphalt binder) is significant because the polymer modifier can improve the performance of asphalt mixture and meet the requirements of the modern asphalt pavement. Herein, we present a novel polysiloxane-modified asphalt with enhanced performance, formed by simply mixing hydroxy-terminated polysiloxane (HO-PDMS) into base asphalt at 140 °C. The interaction mechanism of HO-PDMS in base asphalt was characterized by FT-IR, GPC, and DSC. It reveals that HO-PDMS polymers have been chemically bonded into the asphalt, and, thus, the resultant asphalt exhibits optimal compatibility and storage stability. The results based on fluorescence microscopy and a segregation test prove that HO-PDMS has good compatibility with base asphalt. Moreover, by virtue of the intriguing properties of polysiloxane, the present asphalt possesses improved low- and high-temperature properties, higher thermal stability, and enhanced hydrophobicity compared to conventional asphalt when using an appropriate dosage of HO-PDMS. DSC indicated that the of modified asphalt (-12.8 °C) was obviously lower than that of base asphalt (-7.1 °C). DSR shows that the rutting parameter of modified asphalt was obviously higher than that of base asphalt. BBR shows that modified asphalt exhibited the lowest stiffness modulus and the highest creep rate with an HO-PDMS dosage of 6% and 4%, respectively. These results demonstrate that polysiloxane-modified asphalt can be promisingly utilized in realistic asphalt pavement with specific requirements, particularly high-/low-temperature resistance.

摘要

聚合物改性沥青（沥青=沥青结合料）的发展具有重要意义，因为聚合物改性剂可以改善沥青混合料的性能，满足现代沥青路面的要求。在此，我们展示了一种性能增强的新型聚硅氧烷改性沥青，它是通过在140℃下将端羟基聚硅氧烷（HO-PDMS）简单混入基质沥青中形成的。通过傅里叶变换红外光谱（FT-IR）、凝胶渗透色谱（GPC）和差示扫描量热法（DSC）对HO-PDMS在基质沥青中的相互作用机理进行了表征。结果表明，HO-PDMS聚合物已化学键合到沥青中，因此所得沥青表现出最佳的相容性和储存稳定性。基于荧光显微镜和离析试验的结果证明HO-PDMS与基质沥青具有良好的相容性。此外，由于聚硅氧烷具有有趣的性能，当使用适当剂量的HO-PDMS时，与传统沥青相比，本研究中的沥青具有改善的低温和高温性能、更高的热稳定性和增强的疏水性。DSC表明，改性沥青的（玻璃化转变温度）为-12.8℃，明显低于基质沥青的（-7.1℃）。动态剪切流变仪（DSR）表明，改性沥青的车辙参数明显高于基质沥青。弯曲梁流变仪（BBR）表明，当HO-PDMS用量分别为6%和4%时，改性沥青表现出最低的劲度模量和最高的蠕变速率。这些结果表明，聚硅氧烷改性沥青有望用于具有特定要求的实际沥青路面，特别是高/低温抗性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/55ad5936060f/polymers-15-03795-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/e486d4800da1/polymers-15-03795-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/afd5b3dcc519/polymers-15-03795-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/0b01be879a89/polymers-15-03795-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/5b75f885168e/polymers-15-03795-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/ae425d080c5e/polymers-15-03795-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/967d8c2b0b51/polymers-15-03795-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/ada1bdd52771/polymers-15-03795-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/d2f9a271cc1f/polymers-15-03795-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/556c264803b9/polymers-15-03795-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/6384e8c4e572/polymers-15-03795-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/99a1f66add69/polymers-15-03795-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/55ad5936060f/polymers-15-03795-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/e486d4800da1/polymers-15-03795-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/568309f6a4be/polymers-15-03795-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/1744ab93bdc0/polymers-15-03795-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/afd5b3dcc519/polymers-15-03795-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/0b01be879a89/polymers-15-03795-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/5b75f885168e/polymers-15-03795-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/ae425d080c5e/polymers-15-03795-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/967d8c2b0b51/polymers-15-03795-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/ada1bdd52771/polymers-15-03795-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/d2f9a271cc1f/polymers-15-03795-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/556c264803b9/polymers-15-03795-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/6384e8c4e572/polymers-15-03795-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/99a1f66add69/polymers-15-03795-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/224c/10536769/55ad5936060f/polymers-15-03795-g013.jpg

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