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Superstresscem - Eqiom (CRH Group)

During the construction of pre-stressed concrete engineering structures, the grouting of ducts with a cement grout ensures several functions:

• The coating of the pre-stressed steel bars - in order to protect corrosion effects under a high pH between steel and hydrated cement, i.e. “steel passivation” - ensures the highest protection.

• The filling of empty spaces along the length of the tube allows to create a shield against corrosive agents In a long term, an uncomplete coating could involve corrosion and break off steel bars. The tubes grouting is an operation of primary importance, in terms of implementation quality and in terms of choosing the product. The engineering structure’s life depends on this operation.