Improvement of Concrete Durability by Composite Cement
Mineral powders play positive role in improving the durability of concrete subjected to alkaline and saline corrosion, where sulphate ion and chloride ion coexisted may cause serious deterioration to the reinforced concrete structures. Metakaolin, slag, fly ash and natural zeolite mixed in appropriate proportion were tested in inhibiting the deterioration. It is found that the composite powder might decreased AAR and the charge passed of concrete effectively，the while the 7d and 28d strength of cement and concrete are improved as well.
Hao-Wen YE and Gai-Fei PENG
N. Q. Feng et al., "Improvement of Concrete Durability by Composite Cement", Key Engineering Materials, Vols. 405-406, pp. 14-18, 2009