We will be using shotcrete to repair a concrete box culvert that has some minor spalling. Do we need to apply a bonding agent before applying the shotcrete? How should we prepare the surface?

No bonding agent is required. A key to a successful repair is proper surface preparation. The surface receiving the shotcrete must have the deteriorated material completely removed, be thoroughly cleaned, and in a saturated surface-dry condition (SSD) at the time of shotcrete appli­cation. Another key item is proper curing and protection following shotcreting. Details can be found in the Task Force 37 Report “Guide Specification for Shotcrete Repair of Highway Bridges.” The document is available from the American Associ­ation of State Highway and Transportation Officials (AASHTO), Washington, DC.

Tiber Creek Sewer Rehabilitation

As part of the DC Clean Rivers Project ? Division 1 Main Pumping Station Diversions, the Tiber Creek trunk sewer was designated to receive a new structural liner in a 122 ft (37 m) section near the intersection of New Jersey Ave. and Tingey St. in southeast Washington, DC.

Oroville Dam Emergency Recovery

Oroville Dam, built in 1957, is an earth-filled embankment dam located on the Feather River, east of the city of Oroville, CA, in the Sierra Nevada foothills east of the Sacramento Valley.

Brattleboro Bridge Project

In August 2016, Superior Gunite was awarded a subcontract from PCL Civil Constructors to shoot and carve eight web fins on the piers of the I-91 Brattleboro Bridge, in Brattleboro, VT.

Norick State Fair Arena Structural Repairs

Norick State Fair Arena is a multipurpose arena located on the grounds of the Oklahoma State Fair in Oklahoma City, OK. Construction on the arena was completed in 1965.