抽提回收过程对沥青老化程度评价的影响

田小革; 莫一魁; 郑健龙

抽提回收过程对沥青老化程度评价的影响

长沙理工大学公路工程学院, 湖南长沙 410076

基金项目:

国家自然科学基金项目 50408007

详细信息

作者简介:
田小革(1970-), 男, 湖北武汉人, 长沙理工大学副教授, 从事路面工程研究

中图分类号: U414
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- 文章访问数: 354
- HTML全文浏览量: 99
- PDF下载量: 199
- 被引次数: 0
出版历程
- 收稿日期: 2004-09-05
- 刊出日期: 2005-06-25

Effect of extracting and reclaiming process on aging degree of asphalt

School of Highway Engineering, Changsha University of Science and Technology, Changsha 410076, China

More Information

Author Bio:
Tian Xiao-ge(1970-), male, associate professor, 86-731-5040705, txgly@public.cs.hn.cn

摘要

摘要: 对不同老化程度的沥青先采用三氯乙烯溶解, 再用真空旋转回收仪回收, 然后对沥青进行系统的试验, 获得不同老化程度的沥青在抽提回收前后的针入度、软化点、延度、粘度等常规指标以及动态剪切模量、相位角、低温弯曲蠕变劲度、低温抗拉强度等性能指标, 通过分析各项性能的变化研究抽提回收过程对沥青老化程度的影响规律。试验结果表明不同老化程度的沥青在经过抽提回收过程后, 其各项性能指标的变化均较小, 排除试验误差的影响, 采用真空旋转回收仪回收沥青时对沥青的老化程度的影响可以忽略, 因此可以用于评价沥青的老化程度。
- 道路工程 /
- 沥青结合料 /
- 老化程度 /
- 评价 /
- 抽提回收
Abstract: Different aged asphalts were dissolved in trichloroethylene, then were reclaimed with vacuum rotating reclaimer. Systematic test was made, the penetration, softening point, ductility, viscosity, dynamic shear modulus, phase angle, bending creep stiffness and tensile strength of the various aged asphalts and the corresponding reclaimed asphalts at low temperature were analyzed. [HJ] The influence of the extracting and reclaiming process on the aging degree of asphalt was concluded through analyzing the variances of various performance indices of different aged asphalts before and after the extracting and reclaiming process. The test results show that the variances of various performance indices are small for various aged asphalts after the extracting and reclaiming process. Considering the test error, it is concluded that the extracting and reclaiming process has little impact on the aging degree of asphalt binder by using revolution vacuum reclaimer, so the aging degree of asphalt binder can be evaluated using the asphalt reclaimed with revolution vacuum reclaimer.
- road engineering /
- asphalt binder /
- aging degree /
- evaluation /
- extracting and reclaiming

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表 1 原样沥青的基本性能

Table 1. Fundamental characteristics of original asphalts

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表 2 原样沥青针入度

Table 2. Penetrations of original aged asphalts

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表 3 抽提回收沥青针入度

Table 3. Penetrations of reclaimed asphalts

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表 4 沥青软化点

Table 4. Softening temperature of asphalts

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表 5 沥青延度

Table 5. Asphalts ductilities

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表 6 原样沥青的粘度

Table 6. Viscosities of original asphalts

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表 7 抽提回收沥青粘度

Table 7. Viscosities of reclaimed asphalts

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表 8 沥青粘度的偏差

Table 8. Differences of asphalts viscosities

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表 9 原样沥青动态参数

Table 9. Dynamic parameters of original asphalts

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表 10 抽提回收沥青的动态参数

Table 10. Dynamic parameters for reclaimed asphalts

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表 11 原样沥青蠕变劲度模量

Table 11. Creep stiffness moduli of original asphalts

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表 12 回收沥青蠕变劲度

Table 12. Creep stiffness moduli of reclaimed asphalts

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表 13 沥青蠕变劲度偏差

Table 13. Differences of asphalt creep stiffness moduli

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表 14 沥青抗拉强度

Table 14. Tensile strengthes of original asphalts

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表 15 回收沥青极限抗拉强度

Table 15. Tensile strengthes for reclaimed asphalts

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表 16 沥青极限抗拉强度的差值

Table 16. Differences of asphalts tensile strengthes

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参考文献(7)

[1]	JTJ 052-2000, 公路工程沥青及沥青混合料试验规程[S].
[2]	余叔藩. 性能分级沥青结合料规范和试验[R]. 重庆: 交通部重庆公路科学研究所, 1997.
[3]	Tian Xiao-ge, Zheng Jian-long, Zhang Qi-sen. Effect of aging on viscoelastic performance of asphalt binder[J]. Journal of Traffic and Transportation Engineering, 2004, 4(1): 3-6. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JYGC202002002.htm
[4]	Lexington K Y. Background of SHRP asphalt binder test methods[R]. Asphalt Institute Research Center, 1993.
[5]	AASHTO. Standard practice for accelerated aging of asphalt binder using a pressurized aging vessel[R]. USA, AASHTO, 1993.
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[7]	Asphalt Institute Research Center. Superpave level 1 mix design, Superpave series No. 2(SP-2)[R]. Asphalt Institute Research Center, 1995.