Electrochemical investigations of carbon steel reinforcement and galvanized steel reinforcement in fresh geopolymer mortars

摘要

Concrete is the most produced material in the world. Every year approx. 6.000.000.000 m~3 are produced worldwide and it is expected that the production volume will continue to increase because of the economic growth of many countries around the world. This development will also result in an increase of manufacturing CO_2 emissions if nothing changes. The cement production is already responsible for 5-10% of the worldwide anthropogenic CO_2 emissions. An immense decrease of the CO_2 emissions (approx 45-65%) can be achieved by the use of geopolymers as binder instead of ordinary Portland cement. However, so far only limited data exists regarding the corrosion behavior of reinforcements in geopolymer concretes.