Roux S.,CNRS Jean Lamour Institute |
Bur N.,IMFS INSA de Strasbourg |
Tribollet B.,University Pierre and Marie Curie |
Feugeas F.,IMFS INSA de Strasbourg
Materiaux et Techniques | Year: 2011
Rebars corrosion is a common pathology of civil engineering works for which the protective and curative solutions are generally not in agreement with environmental considerations. This study aims to evaluate a corrosion inhibitor admixture whose active component is an ecofriendly biopolymer having corrosion inhibiting properties. The samples were manufactured using 2 cement bases including a CEM V that is more ecofriendly than traditional CEM I because containing industrial residues and byproducts. Capillary imbibition tests and water total porosity showed the low influence of the admixture on the pore structure of mortars. After immersion in natural seawater of cement pastes reinforced with steel C15 rebars, electrochemical measurements showed that the biopolymer does not affect the free corrosion potential of reinforcement nor the composition of passive layer but inhibits the cathodic reaction of oxygen reduction. © 2011 EDP Sciences.