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PPA/SBS 改性生物混合沥青的常规性能及微观特性研究

Study on the Conventional Performance and Microscopic Properties of PPA/SBS-Modified Bio-Mixed Asphalt.

作者信息

Liu Guiyong, Zhang Wei, Yang Xiaolong, Ning Zhikang

机构信息

School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China.

Gansu Road & Bridge Construction Group Co., Ltd., Lanzhou 730099, China.

出版信息

Materials (Basel). 2022 Jun 9;15(12):4101. doi: 10.3390/ma15124101.

DOI:10.3390/ma15124101
PMID:35744161
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9229871/
Abstract

To promote the construction of environmentally friendly, sustainable pavements and solve the impact of the scarcity of asphalt resources on highway development, bio-mixed asphalt (BMA) modified by SBS and polyphosphoric acid (PPA) was prepared, and the influence of the ratio of bio-asphalt (BA) replacing petroleum asphalt on different PPA/SBS blending schemes was explored through conventional property tests. According to each PPA/SBS blending scheme, the optimal replacement ratio of bio-asphalt was optimized, and the microstructure and distribution morphology of different PPA/SBS-modified BMA were evaluated. Conventional property test results show that with the same PPA/SBS content, the replacement ratio of bio-asphalt has a significant impact on the conventional performance of composite-modified asphalt, but the appropriate replacement ratio of bio-asphalt can improve the storage stability and conventional performance of composite-modified asphalt; in micromorphological analysis, it was found that the number of bee-like structures on the surface of the modified BMA decreased significantly, which indicated that the molecular heterogeneity of various components in the asphalt was reduced. In addition, bio-asphalt changed the particle morphology and improved the dispersity of SBS in asphalt. The composite-modified BMA had a lower SBS content, but its conventional performance was still excellent-so it has significant application prospects in road engineering.

摘要

为推动环保型、可持续路面的建设，解决沥青资源稀缺对公路发展的影响，制备了经SBS和多聚磷酸（PPA）改性的生物混合沥青（BMA），并通过常规性能试验探究了生物沥青（BA）替代石油沥青的比例对不同PPA/SBS掺配方案的影响。根据各PPA/SBS掺配方案，优化了生物沥青的最佳替代率，并对不同PPA/SBS改性BMA的微观结构和分布形态进行了评价。常规性能试验结果表明，在PPA/SBS含量相同的情况下，生物沥青的替代率对复合改性沥青的常规性能有显著影响，但适当的生物沥青替代率可提高复合改性沥青的储存稳定性和常规性能；在微观形态分析中发现，改性BMA表面的蜂窝状结构数量显著减少，这表明沥青中各组分的分子不均匀性降低。此外，生物沥青改变了颗粒形态，提高了SBS在沥青中的分散性。复合改性BMA的SBS含量较低，但其常规性能仍然优异，因此在道路工程中具有显著的应用前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/3da85b735d3d/materials-15-04101-g011a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/6b0417476659/materials-15-04101-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/606cb6dd59e6/materials-15-04101-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/6136eaaf0f34/materials-15-04101-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/7ec6e8ad2474/materials-15-04101-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/93e8be73e668/materials-15-04101-g005.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/6da6ce483c1a/materials-15-04101-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/3eb408d87fc9/materials-15-04101-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/f340de2db056/materials-15-04101-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/3eb0cf7d926a/materials-15-04101-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/3da85b735d3d/materials-15-04101-g011a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/6b0417476659/materials-15-04101-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/606cb6dd59e6/materials-15-04101-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/6136eaaf0f34/materials-15-04101-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/7ec6e8ad2474/materials-15-04101-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/93e8be73e668/materials-15-04101-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/010f971d1c48/materials-15-04101-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/6da6ce483c1a/materials-15-04101-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/3eb408d87fc9/materials-15-04101-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/f340de2db056/materials-15-04101-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/3eb0cf7d926a/materials-15-04101-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0660/9229871/3da85b735d3d/materials-15-04101-g011a.jpg

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