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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2020, Vol. 39 ›› Issue (10): 74-78.DOI: 10.3969/j.issn.1674-0696.2020.10.13

• 道路与铁道工程 • 上一篇    下一篇

Fe2O3-沥青胶结料损伤愈合性能研究

李明霞1,吴国雄1,2,3,李新凯4,邹蔚然1,程于航1   

  1. (1. 重庆交通大学 土木工程学院,重庆 400074; 2. 重庆交通大学 交通土建工程材料国家地方联合工程实验室,重庆 400074; 3. 重庆建筑工程职业学院,重庆 400072; 4. 重庆交通大学 河海学院,重庆 400074)
  • 收稿日期:2019-06-24 修回日期:2019-09-09 出版日期:2020-10-30 发布日期:2020-11-03
  • 作者简介:李明霞（1992—）, 女, 河南焦作人, 博士研究生, 主要从事沥青及沥青混合料自愈合方面的研究。E-mail：limingxia925@163.com
  • 基金资助:
    重庆交通大学研究生科研创新基金项目（2018B0103）

Damage Healing Property of Fe2O3-Asphalt Binder

LI Mingxia1, WU Guoxiong1,2,3, LI Xinkai4, ZOU Weiran1, CHENG Yuhang1   

  1. (1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. National Local Joint Engineering Laboratory of Traffic Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China; 3. Chongqing Jianzhu College, Chongqing 400072, China; 4. College of River & Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China)
  • Received:2019-06-24 Revised:2019-09-09 Online:2020-10-30 Published:2020-11-03

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摘要： 为探究Fe2O3-沥青胶结料的自愈合性能及其影响因素，通过DSR试验，对Fe2O3沥青胶结料进行了疲劳—愈合—疲劳试验，探究和分析了不同Fe2O3掺量比的沥青胶结料在不同愈合时间、不同加载应变以及不同损伤程度条件下的愈合能力。研究结果表明：愈合时间的延长有助于Fe2O3-沥青胶结料自愈合，损伤程度的增大会降低其愈合能力，加载应变的不同对 Fe2O3-沥青胶结料愈合性能也会造成影响；在同一愈合条件下，随着Fe2O3掺量比例的增大，Fe2O3-沥青胶结料的愈合率先增大后减小，改变幅度与Fe2O3的掺量比例有关；当Fe2O3掺量比为20%时，沥青胶结料的愈合率达到最大；当采用以愈合前后沥青胶结料的复数模量变化为依据的4种愈合指标评价其愈合性能时，得到的不同Fe2O3掺量比条件下的沥青胶结料愈合率演变规律具有一致性；由HI1愈合指标公式计算得到的愈合率普遍偏大；由HI2愈合指标公式计算得到的愈合率普遍偏小；由HI3和HI4计算得到的愈合率数值较为接近。

关键词: 道路工程, Fe2O3, 沥青胶结料, DSR, 愈合率, 愈合指标

Abstract: In order to explore the self-healing performance of Fe2O3-asphalt binder and its influencing factors, the fatigue-healing-fatigue test of Fe2O3-asphalt binder was carried out by DSR test. And the healing ability of asphalt binder with different Fe2O3 dosage ratios under the conditions of different healing time, different loading strain and different damage degree was studied and analyzed. The research results show that the prolongation of healing time is helpful to the self-healing of Fe2O3-asphalt binder, the increase of damage degree will reduce its healing ability, and different loading strain will also affect the healing performance of Fe2O3-asphalt binder. Under the same healing condition, with the increase of the proportion of Fe2O3 content, the healing rate of Fe2O3-asphalt binder increases at first and then decreases, and the increase and decrease range are related to the proportion of Fe2O3 content. When the dosage ratio of Fe2O3 is 20%, the healing rate of asphalt binder reaches the maximum. When four kinds of healing indexes based on the change of complex modulus of asphalt binder before and after healing are used to evaluate the healing performance, the evolution law of the healing rate of Fe2O3-asphalt binder is consistent under the condition of different Fe2O3 dosage ratio. The healing rate calculated by HI1 healing index formula is generally too large, the healing rate calculated by HI2 healing index formula is generally small, and the healing rate calculated by HI3 and HI4 is close to each other.

Key words: highway engineering, Fe2O3, asphalt binder, DSR, healing ratio, healing index

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