| Title |
Effect on the Corrosion of Steel by Unburnt Carbon in Fly Ash Cement Mortar |
| Authors |
하태현(Ha, Tae-Hyun) ; 배정효(Bae, Jeong-Hyo) ; 김대경(Kim, Dae-Kyeong) ; 이현구(Lee, Hyun-Goo) ; 하윤철(Ha, Yoon-Cheol) |
| Keywords |
Fly Ash ; Activated Carbon ; Corrosion of Steel |
| Abstract |
The increase of activated carbon contents in fly ashes accelerate the corrosion of steel embedded in ordinary portland cement(OPC) mortar. Cement losses its identity of colour when the % of carbon is increased. More than 60[%] area was rusted when carbon content is increased beyond 8[%] for the exposure period of one year. Comparable corrosion rate with OPC was obtained up to 6[%] carbon level only. The tolerable limit of replacement for various admixed carbon system under aggressive alternate wetting and drying condition with 3[%] NaCl was found to be 6 to 8[%]. |