基于不同加载模式的沥青零剪切粘度研究

孟勇军; 张肖宁; 贾娟

基于不同加载模式的沥青零剪切粘度研究

孟勇军^{1, 2,},
张肖宁³,
贾娟⁴

1.
重庆鹏方路面工程技术研究有限公司，重庆 400054
2.
哈尔滨工业大学交通科学与工程学院，黑龙江哈尔滨 150090
3.
华南理工大学交通学院, 广东广州 510640
4.
广州市市政园林局, 广东广州 510640

基金项目:

国家西部交通建设科技项目 200431800004

详细信息

作者简介:
孟勇军(1981-), 男, 河南西平人, 重庆鹏方路面工程技术研究有限公司工程师, 工学博士, 从事道路工程材料研究

中图分类号: U414.1
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- 被引次数: 0
出版历程
- 收稿日期: 2008-03-12
- 刊出日期: 2008-08-25

Research on zero shear viscosity of asphalt based on different loading modes

1.
Chongqing Pengfang Pavement Engineering Technology Research Co.Ltd., Chongqing 400054, China
2.
School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China
3.
School of Traffic and Communications, South China University of Technology, Guangzhou 510640, Guangdong, China
4.
Guangzhou Municipal Garden Administration Bureau, Guangzhou 510640, Guangdong, China

More Information

Author Bio:
MENG Yong-jun(1981-), male, engineer, PhD, +86-23-60525351, hitmengyj@163.com

摘要

摘要: 为了得到合理的评价沥青高温性能的指标, 通过对不同沥青的动载和静载试验, 分析了零剪切粘度(ZSV)在不同加载方式下的变异, 研究了该指标对于评价沥青高温性能的适用性和可行性, 评价了不同流变模型对高温性能拟合参数的影响。分析结果表明: 通过动态频率扫描的图形外延可以直接得到基质沥青的ZSV值, 改性沥青在低剪切速率下无法进入粘性流动状态, 不能通过试验的图形外延直接得到零剪切粘度; 采用静态加载拟合得到的ZSV值均小于动态加载的ZSV值, 但通过Carreau模型对动载试验结果进行拟合与通过离散延迟谱对长时间静载蠕变试验结果进行拟合的ZSV值相关性最好, 可以共同作为沥青路用性能的高温评价指标。
- 路面工程 /
- 高温指标 /
- 改性沥青 /
- 流变模型 /
- 动态加载 /
- 静态加载
Abstract: In order to obtain rational indexes for appraising the high-temperature performance of asphalt, dynamic loading test and static loading test of asphalt were made, the difference of zero shear viscosity(ZSV) was analyzed under different loading modes, the applicability and feasibility of ZSV were studied, the influence of different rheological models on the fitting parameters of asphalt at high temperature was evaluated.Analysis result shows that the ZSV value of base asphalt can be got by extrapolating the figure scanned by dynamic frequency, while modified asphalt can't enter into viscosity flow state at low shear rate, so its ZSV can't be got directly by extrapolating the figure.ZSV values fitted from static loading are smaller than that from dynamic loading, while the values fitted from dynamic loading based on Carreau model and from long-time static loading based on discrete retardation spectrum have a good correlation, and both of them can be used together as high-temperature indexes of asphalt.
- pavement engineering /
- high-temperature index /
- modified asphalt /
- rheological model /
- dynamic loading /
- static loading

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图 1 基质沥青的频率扫描

Figure 1. Frequency sweep of base asphalt

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图 2 埃索改性沥青频率扫描

Figure 2. Frequency sweep of ESSO modified asphalt

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图 3 高模量沥青的频率扫描

Figure 3. Frequency sweep of high modulus asphalt

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图 4 Cross模型拟合曲线

Figure 4. Fitting curves based on Cross model

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图 5 Carreau模型拟合曲线

Figure 5. Fitting curves based on Carreau model

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图 6 Burgers流变模型

Figure 6. Burgers rheological model

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图 7 应变响应

Figure 7. Strain response

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表 1 长时间蠕变恢复试验拟合的ZSV

Table 1. Fitting ZSV from long-time creep-recovery test

沥青	蠕变-恢复时间/h	蠕变阶段η₀/(Pa·s)	恢复阶段η₀/(Pa·s)	离散延迟谱η₀/(Pa·s)
埃索改性	5-5	6.35×10⁴	6.10×10⁴	7.32×10⁴
埃索改性	15-15	7.76×10⁴	7.67×10⁴	8.98×10⁴
高模量	5-5	3.49×10⁵	3.04×10⁵	4.43×10⁵
高模量	15-15	4.52×10⁵	4.17×10⁵	5.06×10⁵

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参考文献(8)

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