CIVE 2700 Lecture Notes - Lecture 13: Quebec Bridge, Elliot Lake, Cavitation
4 Apr 2016
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Document Summary
Site assessments - how not to falsify reports (ethics) Take-home messages: physical and chemical deterioration, concrete durability, corrosion. Pictures: bayshore parking lot concrete corrosion before 2010. Durable concrete is one which will continue to meet the objectives of a building over the expected life of the structure at less cost than any substitute material. Free-thaw in canada -- affects concrete (corrosion) Much research funding into canadian universities to research corrosion. Frps - resist corrosion (frp wraps - strengthen structures that may be corroding) Alkali silica reactions, sulphate attacks, freeze-thaw, corrosion of steel reinforcement. Iron oxidizes; you can only have a certain amount of load. As time goes on and degradation begins to occur, load capacity may lower by 30% Concrete mix not properly designed - improper air-entrainment - too weak. Flange has buckled because they were no longer strong enough to withstand weight. Noticed small issue in 2003; bridge failed and killed 18 people 5 years later.
