From research to practice

New findings on formwork corrosion

Steel formwork/mold corrosion has long been an issue in the precast industry. After the usual demolding times of 8 to 16 hours, the molds and production tables show rust stains that become visible as brown, spotted discolorations on the concrete surfaces, which create a significant disturbance, particularly in areas where architectural concrete is specified. The individual contractors have to invest a lot of time and money to remove the rust stains both from the concrete surfaces and from the forms.

The root cause of this recurring issue had long been unknown. The few studies undertaken in this...

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