Evaluation of Durability Properties by Binder Composition of Combined Deterioration Concrete Such as Carbonation and Salt Damage

Abstract

In this study, mixing design was proportioned with the various water-binder ratio 0.55 binder compositions corresponding to type I cement without any supplementary materials (OPC), type II cement with 50 % blast-furnace slag replacement (BFS50), type III cement with 15 % fly ash replacement (FA15) and ternary cement with type III cement, 15 % fly ash and 35 % slag replacement (BFS35/FA15). This study is carried out to compare individual deterioration test with combined deterioration test and to investigate the effect of the permeation of deterioration factors such as CO₂ and chloride ion under the combined deterioration environments. After setting up various deterioration factors and levels such as carbonation, salt damage and the repetition of drying-wetting, items such as carbonation, chloride ion penetration were evaluated under the combined deterioration environments. The results showed that carbonation and chloride ion penetration depth were increased according to the combined deterioration environments.