| Title |
Chloride Migration Properties of High Durable Marine Concrete Using the Expansion Production Admixture |
| Keywords |
Marine Concrete ; Expansion Production Admixture ; Chloride Migration ; Endurance Period |
| Abstract |
Recently, high strength, flowability, and durability of concrete were required according to increase of large scale and high rise structure. However, cracks occurred easily on the high performance concrete. In this reason, using expansion agent for reducing shrinkage cracks were increased, but it did not consider on durability of high performance concrete. Accordingly, this study investigated the resistance of shrinkage and damage form salt by mixing CSA expansion agent on the blast-furnace slag cement and mixed cement for the low heat of hydration by three components. The cases that 8 % of expansion agent was mixed and the proportion was OPC were expanded till 43.7 times compared with control concrete. For the resistance to the damage of salt, it was improved when mixing ratio was incresed and the maximum size of coarse aggregate growed bigger. In this study, the resistance to the damage of salt of the cases that 8 % of expansion agent was mixed was improved about 16 % compared with control concrete. The terms of durability from the resistance to the damage of salt were improved 1.7 times at maximum when mixing ratio was incresed and 1.5 times at maximum when maximum size of coarse aggregate growed bigger. |