An investigation of new composite materials and methods to repair chloride contaminated concrete structures
Abstract
Even though concrete structures are considered as durable, some structures deteriorate due to severe environmental conditions during the service life. Chloride ions, originating from deicing salts or seawater, are the primary cause of reinforcing steel corrosion in highways and marine or coastal structures. Also, in urban and industrial areas, where environmental pollution results in a significant concentration of carbon dioxide, carbonation - initiated reinforcement corrosion prevails. In order to counteract the problems that the environmental factors cause, new materials and methods that enhance structure’s durability must be developed and applied during the building or/and the repair of concrete structures. The aim of this thesis is to estimate how the use of supplementary cementitious materials and formwork liners enhance the durability of concrete structures against chloride and carbon dioxide penetration. Microconcretes (simulated concrete without the coarse aggregates) with diff ...
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