In the fall of 2001, Veterans Affairs Canada (VAC) and Heritage Conservation Services Canada (HCS) initiated a study on marker mountings that are rapidly deteriorating at Brookside Cemetery in Winnipeg, Manitoba. This research project addresses two conditions believed to be deleterious to the anchor assembly for the marker: mechanical (i.e., service load) and environmental (i.e., frost action and exposure to moisture) conditions. The investigation focuses on the mechanism of degradation of the anchor assembly system and GFRP reinforcement concrete support beams under synergetic effect of chemical and mechanical processes and harsh environmental conditions.
Five variables were considered in the laboratory investigation:
• marker mounting methods;
• concrete type used for the supporting beams;
• reinforcement/rod type;
• adhesive type; and,
• method of support beam emplacement.
The testing program focuses on three structural anchor assembly types: pinning, pocket and bumper. The anchor marker assembly is subjected to an accelerated aging regime that represents the long-term exposure to the actual environment. The bond degradation is quantified with a direct pull-out test, and deterioration of the reinforced concrete supporting beams is quantified by monitoring the changes in the mechanical properties with lateral loading, shear and bending tests. The marker field performance is being monitored by ISIS Canada.
© «Reinforcing Concrete Structures with Fiber Reinforced Polymers» by ISIS Canada