A permanent patch was applied with proper preparation and compaction. Survey Results Using permanent procedures to apply conventional hot and cold mixes in dry holes at temperatures above 32 degrees F. produced the longest-lasting patches. Proprietary mixes had 1.6 times longer life when placed in a dry hole rather than a wet one, and 1.1 times longer life when applied in above-freezing temperatures. Survey respondents rarely mentioned proprietary cement mixes. Under warm conditions, proprietary materials did not significantly outperform conventional materials.
Warm temperatures improve patch life.
And dry holes significantly improve patch life. Proprietary materials are designed to improve performance under cold and wet conditions. SHRP will continue the study of pothole patching by doing field tests of materials and procedures under wet and cold conditions. The research will record results in such areas as performance and cost-effectiveness.