固废填料对改性沥青老化过程中的疲劳特性影响研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (8): 2822-2830.

• 道路材料 • 上一篇

固废填料对改性沥青老化过程中的疲劳特性影响研究

郭兵兵¹, 贾雪梅², 张恒基^2,3, 刘力源^2,3

1.山西省公路局吕梁分局,吕梁 033000;
2.山西黄河前沿新材料研究院有限公司,太原 030000;
3.同济大学,道路与交通工程教育部重点实验室,上海 201804

收稿日期:2021-03-12 修回日期:2021-04-15 出版日期:2021-08-15 发布日期:2021-09-02
通讯作者: 张恒基,博士,工程师。E-mail:hengjizhang@126.com
作者简介:郭兵兵(1967—),男,高工。主要从事大宗固体废弃物在道路工程中的资源化利用研究。E-mail:sxlsg67@163.com
基金资助:
山西省回国留学人员科研资助(HGKY2019031)

Effect of Solid Waste Filler on Fatigue Property of Modified Asphalt During Aging Process

GUO Bingbing¹, JIA Xuemei², ZHANG Hengji^2,3, LIU Liyuan^2,3

1. Lvliang Branch of Shanxi Provincial Highway Bureau, Lvliang 033000, China;
2. Shanxi Huanghe Institute of Frontier Research Materials Institute Co., Ltd., Taiyuan 030000, China;
3. The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai 201804, China

Received:2021-03-12 Revised:2021-04-15 Online:2021-08-15 Published:2021-09-02

摘要/Abstract

摘要： 为了探究老化过程中固废填料的加入对改性沥青抗疲劳性能的影响,进而分析固废填料对改性沥青老化行为特征的影响。本研究基于赤泥、粉煤灰、硅藻土以及常规矿粉填料制备了4种改性沥青胶浆,在未老化、长期老化两个阶段分别进行线性振幅扫描试验,采用4种疲劳评价指标(累计疲劳损伤D(t)、完整性指数C(t)、应变敏感程度B值和疲劳寿命)评价疲劳性能,并提出老化-疲劳性能衰变指数来表征老化对沥青胶浆带来的负面作用。研究表明:填料的加入会降低原样沥青疲劳性能,但可以改善沥青胶浆经历老化历程后的疲劳性能,即可以提升胶浆的抗老化性能,改善效果由高到低为硅藻土、赤泥、矿粉、粉煤灰;填料的加入同时具有硬化脆化和微粒填充作用,两者此消彼长,共同决定影响效果。

关键词: 改性沥青胶浆, 固体废弃物, 赤泥, 疲劳性能, 老化过程, 线性振幅扫描, 微粒填充

Abstract: To find the effect of adding solid waste filler on the fatigue property of modified asphalt, and then explore the effect of solid waste filler on the aging behavior of modified asphalt. This study used red mud, fly ash, diatomite and limestone powder to prepare four types of modified asphalt mortar. The fatigue properties of the original asphalt mortar and aged asphalt mortar were tested by linear amplitude sweep test (LAS), respectively. Four types of indicators were used in this article to evaluate the fatigue property of tested samples, including the damage accumulation (D(t)), integrity index (C(t)), strain sensibility (B) and fatigue life. Besides, the aging-fatigue decay index was selected in this study to indicate the negative effect of aging on asphalt mortar. The test results show that the addition of solid waste filler improves the fatigue property of modified asphalt during the aging process, namely, it enhances the aging resistance of modified asphalt. The level of improvement is listed from high to low as follows: diatomite, red mud, limestone powder, fly ash. Besides, adding solid waste filler not only hardens the asphalt but also fills the crack, both effects compete and determine the fatigue property jointly.

Key words: modified asphalt mortar, solid waste, red mud, fatigue property, aging process, linear amplitude sweep, particle filling

中图分类号:

TU535

郭兵兵, 贾雪梅, 张恒基, 刘力源. 固废填料对改性沥青老化过程中的疲劳特性影响研究[J]. 硅酸盐通报, 2021, 40(8): 2822-2830.

GUO Bingbing, JIA Xuemei, ZHANG Hengji, LIU Liyuan. Effect of Solid Waste Filler on Fatigue Property of Modified Asphalt During Aging Process[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(8): 2822-2830.

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固废填料对改性沥青老化过程中的疲劳特性影响研究

Effect of Solid Waste Filler on Fatigue Property of Modified Asphalt During Aging Process

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