Influence of herbal and mineral fillers on physical and rheological properties of bitumen

IF 1.6 Q3 ENGINEERING, CIVIL Australian Journal of Civil Engineering Pub Date : 2020-07-20 DOI:10.1080/14488353.2020.1794328

Mohsen Aboutalebi Esfahani

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引用次数: 3

Abstract

ABSTRACT Even though fillers such as Limestone Powder (LP), Hydrated Lime (HL), cement and ashes improve the performance of pure bitumen, application of Herbal Fillers (HFs) such as oat, wheat and potatoes provides a better mixture in mastic asphalt considering environmental protection problems. Therefore, the aim of this study is to investigate the performance of bitumen modified with HFs. Penetration, softening point, viscosity and dynamic shear rheometer tests are performed using 3 and 5 wt% of fillers in the bitumen. For a better comparison of the results, samples containing LP and HL fillers are also tested. The results show that HFs improves the softening point, viscosity and penetration index. The rutting parameter exhibits a significant improvement in dynamic shear rheometer test. However, its effect on the fatigue parameter is negative. In addition, the shape of the filler is an effective parameter. It was revealed that the performance of fibre-shaped filler is higher than that of spherical one. Oat is the most effective herbal filler, while potato one shows the worst performance.

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草药和矿物填料对沥青物理和流变性能的影响

尽管石灰石粉(LP)、水合石灰(HL)、水泥和灰烬等填料改善了纯沥青的性能，但考虑到环境保护问题，燕麦、小麦和土豆等草本填料的应用为沥青沥青提供了更好的混合料。因此，本研究的目的是研究HFs改性沥青的性能。在沥青中加入3 wt%和5 wt%的填料，进行渗透、软化点、粘度和动态剪切流变仪测试。为了更好地比较结果，还测试了含有LP和HL填料的样品。结果表明，掺高氟化氢提高了软点、粘度和渗透指数。在动剪切流变仪试验中，车辙参数有明显改善。但其对疲劳参数的影响为负。此外，填料的形状也是一个有效的参数。结果表明，纤维型填料的性能优于球形填料。燕麦是最有效的草药填充物，而马铃薯的填充物表现最差。

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来源期刊

Australian Journal of Civil Engineering ENGINEERING, CIVIL-

CiteScore

3.90

自引率

7.70%

发文量