Cortec’s Patented MCI® Technology designed to protect reinforcing metal in concrete from corrosion is widely used around the globe. Application of MCI® products experienced rapid growth in recent years due to a number of factors such as proven efficiency and environmental advantages. By using this technology, corrosion initiation is delayed, and the lifecycle of structures is significantly extended. Designers and contractors across Europe are now using MCI® Technology in the most demanding projects. Currently, MCI®–309 is being used in the construction of Ponte Taro Bridge in Italy. New cables will be grouted with cement grout in about two to three months. After tensioning of the cables, MCI®-309 powder will be applied to ensure proper protection of the cables during this period. Unfortunately, delays are very common in large construction projects such as bridges that may take many years to complete. For structures that use post-tensioning, grouting is one step that is often postponed for several weeks or months due to cold weather, transit of precast segments, or other project delays. During this time, post-tensioning (PT) tendons installed in PT ducts are at risk for corrosion, especially in environments of extreme moisture, chlorides, or high temperatures. While it can be difficult to protect these tendons in such hard-to-reach areas, Cortec® has provided a simple solution by offering MCI®-309—a Migrating Corrosion Inhibitor™ that requires no flushing before grouting. MCI®-309 has been recently improved by removing silica from its formulation.
Protecting Post-Tension Cables from Corrosion
Streamline the Grouting Process