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A study on fatigue damage different compaction using characteristics of asphalt mixture under 3D-microstructural

Frontiers of Structural and Civil Engineering 2017年第3期11卷 329-337页

作者： Jing HU Pengfei LIU bernhard steinauer Institute of Highway Engineering RWTH Aachen University D52074 Aachen Germany

The aim of this paper is investigating the microstructural characteristics of asphalt mixture under different compaction powers. In order to achieve this aim, a test track was built to provide asphalt mixture specimens and X-ray computed tomography （XCT） device was used to scan the internal structure. The aggregate particles and air-voids were extracted using Digital Image Processing （DIP）, so the relationship between compaction and air-voids was determined at first, and then, the effect of aggregate particles on the morphology of air-voids can be evaluated, finally, fatigue properties of asphalt mixture with different air-void ratio were measured by indirect tensile fatigue test as well. The research results release the distribution ofmicrostructures in asphalt pavement. 3D fractal dimension is an effective indicator to quantize the complexity of aggregate particles and air-voids; suffering the same compaction power, aggregates cause different constitutions of air-voids in asphalt mixture; investigation in this paper can present the essential relationship between microstructures and fatigue properties.

关键词： asphalt mixture microstructure morphology digital image processing fatigue damage

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Calculation of skid resistance from texture measurements

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Journal of Traffic and Transportation Engineering(English Edition) 2015年第1期2卷 3-16页

作者： Andreas Ueckermann Dawei Wang Markus Oeser bernhard steinauer Institute of Highway Engineering RWTH Aachen University

There is a wide range of routine skid resistance measurement devices on the market. All of them are measuring the friction force between a rubber wheel and the wetted road surface. Common to all of them is that they are relatively complex and costly because generally a truck carrying a large water tank is needed to wet the surface with a defined water layer. Because of the limited amount of water they can carry they are limited in range. Besides that the measurement is depending on factors like water film thickness, temperature, measurement speed, rubber aging, rubber wear and even road evenness and curviness. All of these factors will affect the skid resistance and are difficult to control. We present a concept of contactless skid resistance measurement which is based on optical texture measurement and consists of two components： measurement of the pavement texture by means of an optical measufin~ system and calculation of the skid resistance based on the measured texture by means of a rubber friction model. The basic assumptions underlying the theoretical approach and the model itself based on the theory of Persson are presented. The concept is applied to a laboratory device called Wehner/Schulze （W/S） machine to prove the theoretical approach. The results are very promising. A strong indication could be provided that skid resistance could be measured without contact in the future.

关键词： Skid resistance Contactless measurement Pavenent texture Rubber friction model

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德国不限速高速公路路面平整度评价方法综述

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中国公路学报 2019年第4期32卷 105-113,129页

作者：王大为王宠惠 steinauer bernhard 谭忆秋 OESER Markus 哈尔滨工业大学交通科学与工程学院黑龙江哈尔滨150090 亚琛工业大学公路工程研究所北莱茵-威斯特法伦亚琛52074 哈尔滨工业大学城市水资源与水环境国家重点实验室黑龙江哈尔滨150090

平整度是衡量路面质量、评价行车舒适度的重要指标。德国拥有12.993万km的高速公路,其中约2/3的路段没有速度限制,因此德国交通管理部门对路面的功能性和安全性提出了极高的要求。针对上述课题,首先介绍中国"超级公路"的建设背景和需求... 详细信息

平整度是衡量路面质量、评价行车舒适度的重要指标。德国拥有12.993万km的高速公路,其中约2/3的路段没有速度限制,因此德国交通管理部门对路面的功能性和安全性提出了极高的要求。针对上述课题,首先介绍中国"超级公路"的建设背景和需求,强调德国路面的平整度指标对中国道路建设的重要借鉴意义;然后回顾国内外道路平整度的评价和预测等研究手段与方法,介绍德国基于功率谱密度曲线的平均不平整指数(AUN),分析将功率谱密度曲线转化为高度-波长曲线的优点,叙述考虑人车振动反应的有效平整度指数(LWI),简述加权纵断面评价方法(WLP)的思路和步骤;最后总结德国路面平整度评价体系的发展趋势和对于中国道路平整度研究的借鉴与应用前景。

关键词：道路工程德国道路综述超级公路路面平整度评价指标

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Study on High Temperature Behaviour of Gussasphalt

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Journal of Southeast University(English Edition) 2002年第4期18卷 297-301页

作者：杨军 Gharabaghy Cyrus steinauer bernhard 东南大学交通学院南京210096 亚琛工业大学道路研究所

Rutting is one of the most damages in the asphalt surfaces for the orthotropic steel bridge decks. With Hamburg wheel tracking device, the suitable test conditions for Gussasphalt in Germany are pointed out, the high temperature behaviour of Gussasphalt with different binders are tested and compared. The polymer modified binder has higher resistance stability to rutting. The retained time and mixed frequency have obvious effects on Gussasphalt behaviour during Gussasphalt retained period. 

关键词： Gussasphalt high temperature behaviour Hamburg wheel tracking test polymer modified binder

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