Dow Bar Retrofit Concrete Slots Cutting Diamond Grinding Blades

Dow Bar Retrofit Diamond Grinding Head Blades for Concrete Slots Cutting

A dowel bar retrofit (DBR) is a method of reinforcing cracks in highway pavement by inserting steel dowel  bars in slots cut across the cracks. It is a technique which several U.S. states' departments of transportation have successfully used in repairs to address faulting in older jointed plain concrete pavements. The typical approach is to saw cut and jackhammer out the slots for the dowels.

Many states are retrofitting older highways with epoxy-coated dowel bars. The retrofit begins with cutting of six slots (three in each wheel path) across all transverse joints or cracks. The slots are cut with ganged diamond saws that make six cuts in each wheel path. The concrete between the saw cuts is then removed with lightweight jackhammers. The epoxy-coated dowel bars are placed in the slots, then the slots are filled with grout and the joints or cracks are filled with waterproof caulk. The final step is to diamond-grind the joint to remove both excess grout and any displacement of the panels. 

2. Bond Option

We have tens of bond option for different area and countries, please contact us for details. 

• S01, Soft bond, provide a fast and smooth cutting in the hard aggregate
• S02, Soft to Meium bond designed for Medium to hard aggregate cutting;
• S03, Medium bond have a good speed and life conbination on the medium hard aggregate;
• S04, Medium to Hard Bond designed for cutting the soft and medium soft aggregate.
• S05, Hard Bond can achive a long life for cutting the soft limestone, sandstone aggregate.