Dutch researchers have developed a computer model that calculates the rate at which salt and moisture penetrate reinforced concrete. The model can be used for both the design of new concrete structures as well as analysing the lifespan of existing ones.
Sander Meijers from Delft University of Technology studied the relationship between moisture transport and salt penetration in concrete. Concrete structures such as bridges and dams are designed with as long a lifespan as possible. If these structures are built in the sea or are exposed a lot to gritting salt then the reinforcement rods in the concrete eventually rust over the course of time. The consequences are damage and generally expensive repairs.
The researchers built a computer model that calculated how concrete responded to being exposed to salt and moisture. The model can process various external temperatures, humidities and salt concentrations. Furthermore, it can deal with so-called carbonate effects. These are changes in the chemical composition of the concrete that can result in different moisture characteristics.
Nalinie Moerlie | alfa
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