沥青混合料车辙试验改进方法

关宏信; 张起森; 刘敬

doi:10.19818/j.cnki.1671-1637.2011.03.004

沥青混合料车辙试验改进方法

doi: 10.19818/j.cnki.1671-1637.2011.03.004

关宏信^{1, 2, 3,},
张起森¹,
刘敬¹

1.
长沙理工大学交通运输工程学院, 湖南长沙 410004
2.
长沙理工大学公路工程教育部重点实验室, 湖南长沙 410004
3.
长沙理工大学道路结构与材料交通行业重点实验室, 湖南长沙 410004

基金项目:

国家自然科学基金项目 51038002

国家西部交通建设科技项目 2009 318 000 070

详细信息

作者简介:
关宏信(1974-), 男, 湖北潜江人, 长沙理工大学副教授, 工学博士, 从事路面工程研究

中图分类号: U416.217
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- 被引次数: 0
出版历程
- 收稿日期: 2011-01-12
- 刊出日期: 2011-06-25

Rutting test improving methods of asphalt mixture

GUAN Hong-xin^{1, 2, 3
,},
ZHANG Qi-sen¹,
LIU Jing¹

1.
School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410004, Hunan, China
2.
Key Laboratory of Highway Engineering of Ministry of Education, Changsha University of Science and Technology, Changsha 410004, Hunan, China
3.
Key Laboratory of Road Structure and Material of Ministry of Transport, Changsha University of Science and Technology, Changsha 410004, Hunan, China

More Information

Author Bio:
GUAN Hong-xin(1974-), male, associate professor, PhD, +86-731-85258379, guanhxin@sina.com

摘要

摘要: 分析了现行规范中车辙试验方法与路面实际存在的区别, 提出在检验重载车辙时降低加载速度, 补充开展沥青面层的全厚式车辙试验, 在全厚式试件中形成温度梯度的车辙试验改进方法。改进了车辙试验机, 提出不同加载速度下车辙试验时长确定方法和动稳定度计算方法, 利用改进车辙试验机开展了沥青混合料重载低速车辙试验、均匀温度场与温度梯度下全厚式试件的车辙试验, 并基于车辙试验改进方法提出了沥青混合料抗车辙性能评价方法。试验结果表明: 加载速度降低2/3将使沥青混合料动稳定度下降50%~70%, 全厚式试件动稳定度比表面层沥青混合料动稳定度低20%~50%, 这样可充分解释上坡沥青路面产生的车辙现象, 车辙试验改进方法可行。
- 道路工程 /
- 沥青混合料 /
- 车辙试验改进方法 /
- 温度梯度 /
- 全厚式试件
Abstract: The difference between laboratory rutting test conditions and actual pavements was analyzed. Rutting test improving methods were proposed, which included reducing loading speed under heavy loading condition, developing full-thickness rutting tests as conventional rutting tests' complement, forming thermal gradient in full-thickness rutting samples. Rutting tester was improved, and the testing duration times at different loading speeds and the dynamic stability calculating methods were confirmed. Rutting tests were carried out by using improving rutting tester under different conditions. These tests included asphalt mixture's rutting tests under heavy loading and low speed, full-thickness rutting tests under uniform temperature field and under thermal gradient. The anti-rutting performance evaluation method of asphalt mixture was proposed based on the improving methods. Test result shows that dynamic stability of asphalt mixture reduces by 50%-70% when loading speed decreases by 2/3, and the dynamic stability of full-thickness sample is 20%-50% lower than that of surface course asphalt mixture. These can fully explain the rutting disease of asphalt pavement at upgrade section, and the improving methods are feasible.
- highway engineering /
- asphalt mixture /
- rutting test improving method /
- thermal gradient /
- full-thickness sample

HTML全文

图 1 车速分布

Figure 1. Velocity distribution

下载: 全尺寸图片幻灯片

图 2 重载低速车辙试验结果

Figure 2. Rutting test results under heavy loading and low speed

下载: 全尺寸图片幻灯片

图 3 全厚式车辙试验结果

Figure 3. Full-thickness rutting test result

下载: 全尺寸图片幻灯片

表 1 车辙试件内部温度

Table 1. Temperatures in rutting sample ℃

试件恒温时间/h	离顶面距离/cm
试件恒温时间/h	0.0	4.5	10.0	16.0
8.0	60.0	53.2	49.6	47.9
8.3	60.0	53.6	50.1	47.8
8.6	60.0	54.1	50.4	48.0
9.0	60.0	54.2	50.6	47.9
9.5	60.0	54.5	50.8	48.0
10.0	60.0	54.4	50.7	47.9

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