Pavement Potholes Research Articles

New polyurethane modified coating for maintenance of asphalt pavement potholes in winter-rainy condition

Potholes are common distresses on poor quality or heavily trafficked asphalt pavements. Timely and durable maintenance is required to reduce the impacts on traffic, especially in winter and rainy conditions. Conventional coating materials for repair either require complex preparation or are of poor durability. This paper introduces a new polyurethane modified coating material to be used in pothole repairs, and compares it with the other two coating materials which are widely used in pothole maintenance, i.e., emulsified asphalt and cutback asphalt. Laboratory tests concerning workability, bonding performance and durability, and field surveys of three pothole patches installed in different environments were conducted. The results showed that the curing time and workability performance of the polyurethane modified coating were stronger than that of the control materials in low temperatures. Shear strength and pullout strength were greater at different test temperatures and moisture levels. The use of the polyurethane modified coating enhanced the ability of pothole patches to resist freezing-thawing cycles, dishing and shoving, when compared with the emulsified asphalt and cutback asphalt. The polyurethane modified coating had good pavement performance in field as well. Therefore, it is concluded that the polyurethane modified coating is a suitable choice for timely asphalt pavement potholes maintenance in cold and wet conditions.

Detection of Asphalt Pavement Potholes and Cracks Based on the Unmanned Aerial Vehicle Multispectral Imagery

Asphalt roads are the basic component of a land transportation system, and the quality of asphalt roads will decrease during the use stage because of the aging and deterioration of the road surface. In the end, some road pavement distresses may appear on the road surface, such as the most common potholes and cracks. In order to improve the efficiency of pavement inspection, currently some new forms of remote sensing data without destructive effect on the pavement are widely used to detect the pavement distresses, such as digital images, light detection and ranging, and radar. Multispectral imagery presenting spatial and spectral features of objects has been widely used in remote sensing application. In our study, the multispectral pavement images acquired by unmanned aerial vehicle (UAV) were used to distinguish between the normal pavement and pavement damages (e.g., cracks and potholes) using machine learning algorithms, such as support vector machine, artificial neural network, and random forest. Comparison of the performance between different data types and models was conducted and is discussed in this study, and indicates that a UAV remote sensing system offers a new tool for monitoring asphalt road pavement condition, which can be used as decision support for road maintenance practice.

Fatigue-Damage Model of a Pothole-Repairing Composite Structure for Asphalt Pavement

AbstractCumulative fatigue damage caused by repeated loads is one of the important factors that leads to formation of asphalt pavement potholes after they have been repaired. Investigations show th...

폴리우레탄 개질 아스팔트 바인더를 사용한 포트홀 응급 보수재의 성능평가

PURPOSES : The objective of this study is to develop new pothole repair materials using polyurethane-modified asphalt binder, and to evaluate them relative to current pothole repair materials in order to improve the performance of repaired asphalt pavement. METHODS : In the laboratory, polyurethane-modified asphalt binder is developed, and then asphalt binder is added to produce pothole repair materials. In order to evaluate the properties of this new pothole repair material, both an indirect tension strength test and a direct tension strength test are performed to measure the material strength and bond strength, respectively. Additionally, the basic material properties are evaluated using the asphalt cold mix manual. The strength characteristics based on curing times are evaluated using a total of 7 types of materials (3 types of current materials, 2 types of new materials, and 2 types of moisture conditioned new materials). The indirect tension strength tests are conducted at 1, 2, 4, 8, 16, and 32 days of curing time. The bond strength between current HMA(Hot Mix Asphalt) and the new materials is evaluated by the direct tension strength test. RESULTS AND CONCLUSIONS : Overall, the new materials show better properties than current materials. Based on the test results, the new materials demonstrate less susceptibility to moisture, faster curing times, and an improved bond strength between HMA and the new materials. Therefore, the use of the new materials reported in this study may lead to enhanced performance of repairs made to asphalt pavement potholes.

Driving Mode at Pothole-Subsidence Pavement Based on Wheel Path & Speed

The pavement distress has considerable influence with drivers. Considering the fact that the forms of asphalt pavement potholes, subsidence and cement pavement potholes (collectively defined as pavement pothole-subsidence) are similar and they can influence traffic flow significantly, we put forward to use indexes such as Tangential Diameter Length, Normal Diameter Length, Depth, Lateral distance, etc to describe the characteristics of pothole-subsidence. According to different wheel paths & speed, driving modes was classified into several types, influences of various pothole-subsidence on driving mode and speed was analyzed.

Driving Mode at Pothole-Subsidence Pavement Based on Wheel Path

Considering the fact that the forms of asphalt pavement potholes, subsidence and cement pavement potholes (collectively defined as pavement pothole-subsidence) are similar and they can influence traffic flow significantly, we put forward to use indexes such as Tangential Diameter Length, Normal Diameter Length, Depth, Lateral distance, etc to describe the characteristics of pothole-subsidence, and we also adopt AutoScope-2004 video detection system aided by artificial judging to investigate in the surveyed road section. According to different wheel paths, driving modes was classified into three types, influences of various pothole-subsidence on driving mode and speed was analyzed. We came up with conclusions as follows: one is that pothole-subsidence significantly influenced the variation of vehicle trajectory, 78.5% vehicles altered their driving direction, and the average rate of speed descent is over 20%.