| 沥青混合料动态模量Hirsch预测模型的验证研究 |
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| 引用本文： | 赵延庆,潘有强,黄大喜. 沥青混合料动态模量Hirsch预测模型的验证研究[J]. 公路, 2007, 0(11): 196-198 |
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| 作者姓名： | 赵延庆 潘有强 黄大喜 |
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| 作者单位： | 1. 江苏省交通科学研究院,南京市,210017
2. 内蒙古通辽市交通工程局,通辽市,028000 |
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| 摘 要： | 动态模量可以描述沥青混合料对温度和荷载频率的敏感性,从而可以客观地反映沥青混合料在路面结构中的行为特性。本文对SMA 13、Superpave 20、Superpave 25和ATB 25等4种沥青混合料分别进行了不同温度和荷载频率下的动态模量试验,并利用DSR对混合料中所用的两种沥青胶结料(普通70号沥青和SBS改性沥青)进行对应温度和荷载频率下的动态剪切模量试验,利用试验结果对动态模量Hirsch预测模型进行了验证研究。研究结果表明利用Hirsch模型预测动态模量的精度较好,只是在高温和低荷载频率时预测偏差较大。
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| 关 键 词： | Hirsch预测模型 动态模量 模型验证 温度 频率 |
| 文章编号： | 0451-0712（2007）11-0196-03 |
| 修稿时间： | 2007-05-14 |
Verification of Hirsch Model in Predicting Dynamic Moduli of Asphalt Mixtures |
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| ZHAO Yan-qing,PAN You-qiang,HUANG Da-xi. Verification of Hirsch Model in Predicting Dynamic Moduli of Asphalt Mixtures[J]. Highway, 2007, 0(11): 196-198 |
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| Authors: | ZHAO Yan-qing PAN You-qiang HUANG Da-xi |
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| Affiliation: | 1. Jiangsu Transportation Research Institute, Nanjing 210017, China ; 2. Inner Mongolia Tongliao Municipal Transportation Bureau, Tongliao 028000, China |
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| Abstract: | Dynamic modulus can take the effects of both temperature and loading frequency on asphalt mixtures into account,and thus more accurately reflect the behavior of asphalt mixtures in a pavement structure.In this study,dynamic modulus tests are conducted on four asphalt mixtures,SMA13,Superpave20,Superpave25 and ATB 25 at various temperature and loading frequency conditions,and dynamic shear modulus of the asphalt binders(normal 70# asphalt and SBS modified asphalt) used in the mixtures are tested at the same conditions using DSR.The accuracy of Hirsch model in predicting dynamic modulus is verified using the test results.It is found that Hirsch model can predict dynamic modulus reasonably well except for high temperature and low loading frequency conditions. |
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| Keywords: | Hirsch model dynamic modulus model verification temperature loading frequency |
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