Materials,Research and Standards,Implementing Research Findings:Sawing Joints to Control Cracking in Flexible Pavements.

摘要

Transverse joints were sawed in a deep-strength (12inch) flexible pavement,which is over a granular subgrade,prior to the opening of the roadway to traffic. This research project was located on the two southbound lanes of Interstate 35near Stacy. Each of the three test sections is approximately 500feet long. Joints were sawed at 40, 60,and 100-foot intervvals for a total of 30joints. Two 700-foot control sections,where no joints were sawed,were left between the sawed sections for comparison purposes. After 4-1/2years or 5winters of service almost complete crack arresting was accomplished in the test sections where joints were sawed at 40and 60-foot intervals. A few cracks had formed in the test section where joints were sawed at 100-foot intervals. In contrast numerous cracks had developed in the control sections.