12-Attachment C - Thermal Crack Repair Detail.pdf

This file is a technical drawing/diagram (Attachment B) showing thermal crack repair specifications for pavement or roadway maintenance work. The document illustrates two repair methods: Standard Duty repair for cracks 2.5' or 5.0' wide (30" or 60"), and Heavy Duty repair for the same crack widths. Both methods involve placing 2.5" BM2 64-22 material, using approved knitted fiberglass reinforcement, and specific surface preparation requirements including tack milling and leaving thermal crack material level with millings, sand, or AC (asphalt concrete).

The Standard Duty method requires a 2.5 mill thick application with the thermal crack material left at fill level to provide a level surface for fiberglass reinforcement. The Heavy Duty method uses a thicker 3.5" mill application and includes additional specifications for tack leveling up coarse material and 1" AC level up coarse finishing. Both repair methods emphasize proper surface preparation through tack milled surfaces and require leaving sufficient material in the thermal crack after milling to ensure proper adhesion and structural integrity of the fiberglass reinforcement system.