Abstract
A pothole is a typical structural damage of asphalt pavements that significantly influence the life of asphalt pavements and driving safety. The durability of the existing pit repair methods is generally low. The existing studies in the context of pothole repair mainly focus on the selection and the amount of tack coat materials, nonetheless, very limited studies emphasize the effect of the joint interface shape. This study aims to investigate the influence of the interface joint shape on the service life of pothole repair by experimental testing. The strength and fatigue behavior of the joints were studied and the effectiveness of pothole repairs was evaluated under various conditions, including four temperature levels (5, 10, 15 and 25°C), four strain levels (750 με, 1,000 με, 1,250 με, and 1,500 με) and three loading frequencies (2, 5, and 10 Hz). The optimal interface joint shape was obtained by orthogonal tests. The results indicated that the bond strength and fatigue life of the high viscoelastic emulsified asphalt with an area density of 0.6 kg/m2 in the form of a 30° inclination joint was 473 and 80 times higher than those of traditional pothole repair (i.e., vertical joint form and no tack coat), respectively. Finally, a prediction model was proposed for the interface joint fatigue life considering external parameters through multiple regression analyses. This prediction model can provide a reference for the further study of asphalt pavement pothole repair.
Highlights
Potholes are a kind of damage taking place on the surface of pavement in which the material fractures in a relatively short time period cause a steep depression (Nicholls et al, 2014)
When asphalt mixture is used on the road surface, potholes are developed because of cracking of asphalt surfacing, water penetration into the asphalt, Potholes Reparing With Inclined Joint and traffic loading, while for the thin asphalt-surfacing seals, loss of surfacing, cracking, poor repairs, and poor adhesion between the base and seal coat may lead to pothole occurrence (PaigeGreen et al, 2010)
The bond strength and fatigue life of different forms of interface joints for asphalt pavement pothole repair were studied under different experimental conditions, and the following conclusions are drawn: This study investigate the influences of the joint surfaces of the pothole repairs and the types and dosage of tack coat materials on the bond strength and fatigue performance of the asphalt pavement potholes repair process through pullout and four-point bending tests
Summary
Potholes are a kind of damage taking place on the surface of pavement in which the material fractures in a relatively short time period cause a steep depression (Nicholls et al, 2014). Potholes are a common form of distress on highway asphalt pavements, due to not repairing the pavement distresses at the initial stage of their development (Ghosh et al, 2018). The causes are often complex and many factors may influence the performance of the repaired potholes, including the traffic load, the time interval for scheduled reconstruction, personnel, equipment, availability of materials and the tolerance of the traveling public (Wilson and Romine, 2001). The formation of potholes can be dependent on the type of asphalt pavement surfacing and the materials used. When asphalt mixture is used on the road surface, potholes are developed because of cracking of asphalt surfacing, water penetration into the asphalt, Potholes Reparing With Inclined Joint and traffic loading, while for the thin asphalt-surfacing seals, loss of surfacing, cracking, poor repairs, and poor adhesion between the base and seal coat may lead to pothole occurrence (PaigeGreen et al, 2010)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
