Innovative Materials Development and Testing. Volume 5. Partial Depth Spall Repair in Jointed Concrete Pavements

摘要

The partial-depth spall-repair experiments, conducted as part of the Strategic Highway Research Program (SHRP) H-106 project, is one of the most extensive attempts to date to evaluate the performance of various rapid-setting materials and procedures used in the repair of partial-depth spalls in PCC pavements. Four test installations, consisting of a total of 1,607 patches, were constructed in the four SHRP climatic zones: wet-freeze, wet-nonfreeze, dry-freeze, and dry-nonfreeze. The experiment investigated the performance of several cementitious, polymeric, and bituminous patching materials, and procedures used in repairing jointed concrete pavements. The repair techniques evaluated include saw and patch, chip and patch, mill and patch, waterblast and patch, and minimal preparation clean and patch under adverse conditions. Overall, patch performance has been good; only 2.3 percent of all patches have failed. Although some sigificant differences in distress and overall ratings have been found, for the most part, distinct rankings of materials and repair techniques cannot be made at this time.