Projects » AAR Expansion Monitoring at Fairview Cove Container Terminal

AAR Expansion Monitoring at Fairview Cove Container Terminal

Fairview cove container terminal, Halifax, NS
Halifax Port Authority (HPA) engaged the services of SHM Canada to design and install a monitoring system for measuring Alkali-Aggregate Reactivity (AAR)-induced expansion
Completed: January 2014

Detailed description

Fairview Cove Container Terminal is a deep-water container terminal that can accommodate Post-Panamax vessels. The pier consists of a series of RCC cribs, RCC copewall and an RCC beam supporting a crane rail. The original construction, completed in the late 1970s, comprised ten reinforced concrete cribs. During the expansion carried out in the 1980s, nine RCC cribs were added.  

Halifax Port Authority (HPA), as the owner of the terminal, is responsible for its maintenance and upkeep. Inspections carried out by HPA revealed signs of AAR induced expansion of key RCC components. Sample cores extracted from the cope wall and tested in the laboratory have confirmed the existence of AAR activity in concrete. 

The phenomenon of AAR induced expansion is a long-term process and its effects become evident after considerable passage of time following the initial construction. HPA engaged the services of SHM Canada to design and install an SHM system to measure the effects of AAR associated expansion of copewall concrete by installing sensors at key locations and gather data at regular intervals. The sensors are based on vibrating wire technology and provide data on expansion and temperature. Presently the SHM system is being installed and expected to be commissioned in near future.