The Brooklyn Queens Expressway (BQE) in New York City, New York, underwent a major rehabilitation which is being led by the Triple Cantilever Design Joint Venture (JV). As part of this work, VCS was contracted to perform concrete coring and laboratory testing along the BQE structures from Sands Street to Atlantic Avenue. The primary BQE structure in this area is the Triple Cantilever which carries three levels of traffic on a cantilever structure.
The structure along the BQE was experiencing severe corrosion and other reinforced concrete deterioration mechanisms. The JV was tasked with evaluating the structures and then developing an effective and efficient rehabilitation and service life extension. As part of that work, the JV required that core sampling and laboratory testing be conducted on the concrete so that the current condition could be determined and predictions regarding future deterioration could be made.
VCS extracted 86 concrete cores along the structures and performed laboratory tests like compressive strength, chloride concentration, and petrography. This information was provided to the JV so that they could understand the current condition of the structures and develop service life models for its eventual rehabilitation.