A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Asphalt overlays are one of the most common tools for rehabilitating existing asphalt and concrete pavements. However, the performance of new overlays is often jeopardized by the cracking distress in the existing pavement. This existing cracking propagates, or reflects, through the new overlay to the surface of the new overlay. The rate at which this reflection cracking propagates to the surface is a function of overlay thickness, crack severity, traffic loading and subgrade or subbase support. Once reflection cracks appear on the surface of the new pavement, water and debris can enter the subbase and subgrade which can affect pavement strength and reduce the life of the overlay. Therefore, reducing the rate at which these reflection cracks propagate to the surface of the pavement is desirable in order to lengthen the time between rehabilitation projects or crack sealing operations. Various methods have been used in past decades in an attempt to reduce the rate of reflection crack propagation. These include geosynthetic membranes and asphalt stress absorbing interlayers. This study compares performance of a grid reinforcing system, a polymer modified asphalt-rich interlayer system and control pavement test sections. After five years of performance monitoring differences between the attenuation systems and the controls have appeared.
Asphalt overlays are one of the most common tools for rehabilitating existing asphalt and concrete pavements. However, the performance of new overlays is often jeopardized by the cracking distress in the existing pavement. This existing cracking propagates, or reflects, through the new overlay to the surface of the new overlay. The rate at which this reflection cracking propagates to the surface is a function of overlay thickness, crack severity, traffic loading and subgrade or subbase support. Once reflection cracks appear on the surface of the new pavement, water and debris can enter the subbase and subgrade which can affect pavement strength and reduce the life of the overlay. Therefore, reducing the rate at which these reflection cracks propagate to the surface of the pavement is desirable in order to lengthen the time between rehabilitation projects or crack sealing operations. Various methods have been used in past decades in an attempt to reduce the rate of reflection crack propagation. These include geosynthetic membranes and asphalt stress absorbing interlayers. This study compares performance of a grid reinforcing system, a polymer modified asphalt-rich interlayer system and control pavement test sections. After five years of performance monitoring differences between the attenuation systems and the controls have appeared.
Effectiveness of Two Reflection Crack Attenuation Techniques
Shuler S. (author)
2015
23 pages
Report
No indication
English
Reflection Crack Sealing Study
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