scholarly journals Development of a Full-Depth Wheel Tracking Test for Asphalt Pavement Structure: Methods and Performance Evaluation

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Hui Wang ◽  
Zepeng Fan ◽  
Jiupeng Zhang
Keyword(s):  
Performance Evaluation ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Single Layer ◽  
Test Method ◽  
Shanxi Province ◽  
Wheel Tracking Test ◽  
Pavement Structure ◽  
Pavement Structures ◽  
Wheel Tracking

The rutting performance of asphalt pavement structure relies on the high temperature properties of asphalt mixture as well as the pavement structure and thickness. In order to investigate the influence of the structure and thickness, a full-depth wheel tracking test is developed in this research by improving the conventional wheel tracking test apparatus. The newly proposed test method is capable of varying its load speed and load size, controlling its specimen temperature gradient, and simulating the support conditions of actual asphalt pavement. The full-depth wheel tracking test based rutting performance evaluation of different asphalt pavement structures indicates that it is not reasonable to explain the rutting performance of asphalt pavement structure from the point of view of single-layer asphalt mixture rutting performance. The developed full-depth wheel tracking test can be used to distinguish rutting performance of different asphalt pavement structures, and two of five typical asphalt pavement structures commonly used in Shanxi Province were suggested for use in practical engineering.

scholarly journals Long-Term Performance of Pavement Structures with Cold In-Place Recycled Base Course

2021 ◽  
Vol 16 (2) ◽  
pp. 48-65
Author(s):  
Audrius Vaitkus ◽  
Judita Gražulytė ◽  
Andrius Baltrušaitis ◽  
Jurgita Židanavičiūtė ◽  
Donatas Čygas
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Asphalt Pavements ◽  
Recycled Asphalt ◽  
Binding Agents ◽  
Pavement Structure ◽  
Pavement Structures ◽  
Base Course ◽  
Surface Distress ◽  
Foamed Bitumen

Properly designed and maintained asphalt pavements operate for ten to twenty-five years and have to be rehabilitated after that period. Cold in-place recycling has priority over all other rehabilitation methods since it is done without preheating and transportation of reclaimed asphalt pavement. Multiple researches on the performance of cold recycled mixtures have been done; however, it is unclear how the entire pavement structure (cold recycled asphalt pavement overlaid with asphalt mixture) performs depending on binding agents. The main objective of this research was to evaluate the performance of cold in-place recycled asphalt pavements considering binding agents (foamed bitumen in combination with cement or only cement) and figure out which binder leads to the best pavement performance. Three road sections rehabilitated in 2000, 2003, and 2005 were analysed. The performance of the entire pavement structure was evaluated in terms of the International Roughness Index, rut depth, and pavement surface distress in 2013 and 2017.

Effect of a Chloride Deicing Additive on the Performance of Asphalt Mixture

2014 ◽  
Vol 1049-1050 ◽  
pp. 422-425
Author(s):  
Chao Peng ◽  
Jian Ying Yu ◽  
Jing Dai ◽  
Zhi Jie Zhao ◽  
Jing Yi Fu ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Bending Test ◽  
Rutting Resistance ◽  
Weight Concentration ◽  
Splitting Test ◽  
Wheel Tracking Test ◽  
Beam Bending ◽  
Wheel Tracking ◽  
Test Result

Effect of a chloride deicing additive (Cl-DIA) on the performance of asphalt mixture was investigated by evaluating the moisture, cracking and rutting resistance. Freeze-thaw splitting test result showed that asphalt mixture containing Cl-DIA weakened moisture resistance to some extent but it was still applicable for asphalt pavement. Wheel-tracking test indicated that Cl-DIA evidently improved the rutting resistance of the asphalt mixture and the weight concentration of Cl-DIA in asphalt mixture had to exceed 3%. Beam bending test implied that Cl-DIA did not help for the cracking of the asphalt mixture.

Cracks Resisting Mechanism Analysis of Large Stone Mixture Base Based on Mechanics Calculations

2013 ◽  
Vol 723 ◽  
pp. 729-736
Author(s):  
Hong Zhi Li
Keyword(s):  
Temperature Stress ◽  
Coupling Effect ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Element Model ◽  
Stress And Strain ◽  
Mechanism Analysis ◽  
Large Stone ◽  
Pavement Structure ◽  
Pavement Structures

In order to study the cracks resisting mechanism of large stone asphalt mixture base, a multi-layer elastic theory program was used to calculate the loading stress in different pavement structures. Then a Finite Element model was established based on a twinkling heat conduct hypothesis to calculate temperature stress and strain of pavement structure when temperature dropped. Finally, the stress and strain of all the structural layers was calculated considering the coupling effect of loading and temperature. It is found that temperature stress which is caused by temperate quick dropped is far more lager than loading stress cause by standard loading, while considering the co-effect of vehicle loading and temperature quickly dropped. Thus it is revealed that cracking in pavement is mainly caused by temperature quickly dropped. By contrast, it is found that pavement stress and strain caused by loading and temperature of the structure with asphalt macadam mixture (ATB30) base are less than that of the conventional semi-rigid pavement. Finally, an asphalt macadam mixture base applied in asphalt pavement structure is believed to be an efficient way in reducing asphalt pavement cracking.

scholarly journals Evaluation of the Rutting Performance of the Field Specimen Using the Hamburg Wheel-Tracking Test and Dynamic Modulus Test

2020 ◽  
Vol 2020 ◽  
pp. 1-15 ◽  
Author(s):  
Xiongwei Dai ◽  
Yanshun Jia ◽  
Shaoquan Wang ◽  
Ying Gao
Keyword(s):  
Performance Evaluation ◽  
Dynamic Modulus ◽  
Asphalt Mixture ◽  
Weather Condition ◽  
Test Conditions ◽  
Specimen Height ◽  
Dynamic Modulus Test ◽  
Wheel Tracking Test ◽  
Wheel Tracking ◽  
Hamburg Wheel Tracking

Rutting is a major distress occurring in the service life of the asphalt pavement, especially in hot weather areas. A laboratory-produced specimen is widely used for rutting performance evaluation which may not be completely represented by the field situation. The objective of this study is to evaluate the rutting performance of field specimens from the Chongqing highway by utilizing the Hamburg wheel-tracking test (HWTT) and dynamic modulus test. Different test conditions were conducted on the HWTT by investigation of the actual local weather condition. The results showed that rutting depth was different under different test conditions, and 10000 loading cycles were recommended as the maximum loading cycles. Particularly, several factors that influence the rutting depth were investigated, and the specimen height of 6 cm is more appropriate for the HWTT. Additionally, different test conditions were proposed as the HWTT test condition for different asphalt concrete (AC) layers in the Chongqing area. Rutting contribution of each AC layer to the pavement structure was analyzed. Moreover, the dynamic modulus at 54.4°C, 5 Hz and 54.4°C, 1 Hz could effectively represent the rutting performance of the asphalt mixture, and the dynamic modulus test is recommended for the rutting performance evaluation of the full-thickness AC layer.

Key Technique on the Process Control for Construction of Hohhot Circle Expressway Asphalt Pavements

2012 ◽  
Vol 256-259 ◽  
pp. 1748-1753
Author(s):  
Bin Zhao ◽  
Pei Wen Hao
Keyword(s):  
Inner Mongolia ◽  
Raw Materials ◽  
Asphalt Pavement ◽  
Load Capacity ◽  
Asphalt Mixture ◽  
Natural Increase ◽  
Rigid Base ◽  
Construction Technology ◽  
Pavement Structure ◽  
Major Section

As vehicle flow on arterial highway in Inner Mongolia sharply increased, the originally designed natural increase rate of 8% per year has been exceeded on the vehicle flow in some sections. According to statistics, monthly average vehicle flow on major section of G6 expressway has reached a standard flow of 67478 vehicles per day and night, of which in 70-80% are large ones for coal transportation. Therefore, pavement load and road capacity have exceed the designed expressway load capacity. At present, semi-rigid base asphalt pavement structure is still widely used for high-grade highway pavement in Inner Mongolia. With years of construction for such pavement structure, a great deal of valuable experience has been gained on construction technology. However, there are still a few deficiencies in the quality of raw materials, gradation control of asphalt mixture and adjustment of equipment, etc. Hohhot circle expressway connects with the G6 and G7 expressways, suffering from problems such as large vehicle flow and load overweight. This paper introduced a key technique that should be properly controlled during construction of such pavement structure, emphasized technique control and management of the following aspects, i.e. ballast sizes and gradation control, asphalt concrete mixture, adjustment of pavers, validation of mixing proportion in production and reasonable arrangement of process, and summarized corresponding technical measures taken during construction of asphalt pavement in this project.

scholarly journals Utilización de técnicas petrográficas para evaluar los efectos inducidos del NaCl, condiciones climáticas extremas y el paso del tráfico en las superficies de las carreteras españolas

2017 ◽  
Vol 67 (328) ◽  
pp. 138 ◽  
Author(s):  
A. P. Pérez-Fortes ◽  
M. J. Varas-Muriel ◽  
P. Castiñeiras
Keyword(s):  
El Paso ◽  
Asphalt Mixture ◽  
Polarized Light ◽  
Nacl Solution ◽  
Winter Maintenance ◽  
Traffic Conditions ◽  
Wheel Tracking Test ◽  
Wheel Tracking ◽  
Design Construction

The asphalt surface layer is the most exposed to weather and traffic conditions on roads, especially those subjected to winter maintenance. Therefore, a deep knowledge of the mechanisms which can damage this layer is necessary to improve its design, construction and long-term use. With this purpose, two types of asphalt mixtures used on roads from NW Spain were subjected to durability tests (freezing-thaw and thermal-stress) with a saturated NaCl solution. After the durability tests, a wheel tracking test was performed on the samples, and the resultant material was analyzed by optical polarized light and fluorescence microscopy. This analysis showed that the binder-aggregate low adhesion was the main responsible of the asphalt mixture damage. This damage was concentrated in the aggregates because the binder acted as an impermeable wall. Consequently, the NaCl solution penetrated and degraded the aggregates quickly and strongly.

An approach to investigate coarse aggregates movement of asphalt mixture based on wheel tracking test

2021 ◽  
Vol 309 ◽  
pp. 125161
Author(s):  
Wenchang Liu ◽  
Hongwei Lin ◽  
Hongyu Guo ◽  
Hongchao Zhang ◽  
Shuguang Zhang ◽  
...  
Keyword(s):  
Asphalt Mixture ◽  
Coarse Aggregates ◽  
Wheel Tracking Test ◽  
Wheel Tracking

Pavement Performance of Hot In-Place Recycling for Waste Asphalt Mixtures

2013 ◽  
Vol 668 ◽  
pp. 292-296
Author(s):  
Ya Li Ye ◽  
Chuan Yi Zhuang ◽  
Jia Bo Hu
Keyword(s):  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Pavement Performance ◽  
Test Results ◽  
Technical Parameters ◽  
Stable Performance ◽  
Wheel Tracking Test ◽  
Asphalt Content ◽  
Wheel Tracking

With the early asphalt pavements have been into the stage of medium maintenance or overhaul, recycling is a very important way for waste asphalt mixtures. A sample was taken in the expressway from Huhhot to Baotou, and the waste mixtures were extracted from field and sieved; so that the new aggregates can be determined and mix design was carried. With the aid of the penetration, the softening point and the viscosity in 135°C test, the quantity of the regenerant and the asphalt content were ascertained. Through the high temperature stable performance, the anti-low temperature performance, the water stability and the Hamburg wheel-tracking test, the appropriate gradation and the optimum asphalt content were determined. The test results showed that the pavement performance of the waste asphalt mixture was enhanced obviously with hot in-place recycling, and it has achieved technical parameters for old asphalt mixture.

scholarly journals Unified Strength Model of Asphalt Mixture under Various Loading Modes

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 889 ◽  
Author(s):  
Chengdong Xia ◽  
Songtao Lv ◽  
Lingyun You ◽  
Dong Chen ◽  
Yipeng Li ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Structure Design ◽  
Strength Model ◽  
Compression Tests ◽  
Unconfined Compression ◽  
Direct Tension ◽  
Indirect Tension ◽  
Pavement Structure ◽  
Loading Modes

Although the rutting resistance, fatigue cracking, and the resistance to water and frost are important for the asphalt pavement, the strength of asphalt mixture is also an important factor for the asphalt mixture design. The strength of asphalt mixture is directly associated with the overall performance of asphalt mixture. As a top layer material of asphalt pavement, the strength of asphalt mixture plays an indispensable role in the top structural bearing layer. In the present design system, the strength of asphalt pavement is usually achieved via the laboratory tests. The stress states are usually different for the different laboratory approaches. Even at the same stress level, the laboratory strengths of asphalt mixture obtained are significantly different, which leads to misunderstanding of the asphalt mixtures used in asphalt pavement structure design. The arbitrariness of strength determinations affects the effectiveness of the asphalt pavement structure design in civil engineering. Therefore, in order to overcome the design deviation caused by the randomness of the laboratory strength of asphalt mixtures, in this study, the direct tension, indirect tension, and unconfined compression tests were implemented on the specimens under different loading rates. The strength model of asphalt mixture under different loading modes was established. The relationship between the strength ratio and loading rate of direct tension, indirect tension, and unconfined compression tests was adopted separately. Then, one unified strength model of asphalt mixture with different loading modes was established. The preliminary results show that the proposed unified strength model could be applied to improve the accurate degree of laboratory strength. The effectiveness of laboratory-based asphalt pavement structure design can therefore be promoted.

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