DBR durability

摘要

An alternative to full-depth repairs, the dowel bar retrofit (DBR) process involves inserting epoxy-coated dowel bars into an existing concrete pavement. Certain material requirements help ensure a successful DBR project. Rapid Set DOT Repair Mix meets the following DBR material requirements: achieves a minimum compressive strength of 3,000 psi in three hours and 5,000 psi in 24 hours (ASTM C-39); meets the shrinkage requirement of four days, 0.13% maximum (ASTM C-157); and develops bond strength of 1,000 psi in 24 hours (ASTM C-882). Rapid Set DOT Repair Mix is fast, has high bond strength and is extremely durable.