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孔德生 ，黄桂林

 

（ 东北林业大学 土木工程学院 ，黑龙江 哈尔滨 150006)

摘   要 ：将不同掺量的玄武岩纤维(BF)和聚丙烯纤维  (PP)单掺 、混掺至沥青混合料中进行改性，采用高温车辙 、低温小梁弯曲 、浸水马歇尔、冻融劈裂及弯曲疲劳等室内试验，研究桥面铺装AC- 20 级配沥青混合料的使用性能。结果表明： BF 纤维能够有效提升沥青混合料的强度和硬度，而 PP 纤维可以提供沥青混合料更 好的柔性与黏性；单掺 BF纤维可以有效改善沥青混合料的高温稳定性能 、低温抗裂性能以及抗疲劳性能 ，单掺PP纤维仅改善水稳定性能的效果优于 BF, 而通过采用合理比例的BF与PP纤维混掺改性可综合提升沥青混合料的服役性能及使用寿命。

关键词：沥青混合料 ；纤维 ；橡胶颗粒 ；力学性能 ；路用性能

中图分类号：U414           

文献标志码：A            

文章编号： 1005- 8249   (2024)  04- 0129- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.04.023

 

KONG Desheng ,  HUANG Guilin

(School of Civil Engineering ,  Northeast Forestry University ,  Harbin 150006 ,  China)

Abstract: Basalt fiber ( BF ) and polypropylene fiber ( PP ) with different contentw were mixed into the asphalt mixture for modification, and the high temperature rutting, low temperature trabecular bending, immersion Marshall, freeze-thaw splitting and bending fatigue were used. Laboratory tests were carried out to comprehensively investigate its road performance. The modification of AC-20 grade as phalt mixture for bridge deck pavement was studied.The results show that basalt fiber can effectively improve the strength and hardness of asphalt mixture,while PP fiber can provide better flexibility and viscosity of asphalt mixture.Single-doped BF fiber can effectively improve the high temperature stability,low temperature crack resistance and fatigue resistance of asphalt mixture.The effect of single-doped PP fiber on improving water stability is better than that of BF,and the service performance and service life of asphalt mixture can be comprehensively improved by using a reasonable proportion of BF and PP fiber.

Keywords: asphalt mixture; fiber; rubber particles; mechanical properties; road performance

作者简介： 孔德生  (1994—) ,   男 ，硕士 ， 工程师 ，研究方 向 ：建筑与土木工程。

收稿日期：2023- 03- 19