| Title |
Physical Properties of Cement Kiln Dust(CKD) and Engineering Properties of Cement Mortar Incorporating CKD |
| Authors |
Han Cheon-Goo ; Kim Seong-Soo ; Hwang Yin-Seong ; Cha Cheon-Soo |
| Keywords |
Cement Kiln Dust(CKD) ; Chemical Composition ; Heat of Hydration ; Early Strength Development |
| Abstract |
In this paper, physical, chemical properties of CKD(Cement Kiln Dust) in each cement manufacturing company as well as engineering properties of cement mortar incorporating CKD are discussed in order to provide effective application method of CKD. According to test results, grain shape of CKD has an angular shape and same shape with grain of lime stone. Density of CKD is rather smaller than that of OPC (Ordinary Portland Cement) and blaine is greater than that of OPC more than 2～3 times. The hydration temperature of 10% CKD mortar is higher than that of OPC more than 3～4℃, but no hydration reaction of CKD in itself is observed. For chemical composition, main composition of CKD is CaO. CKD has a large loss on ignition. According to XRD analysis, highest peak point with CaCO3 is observed, which account for the same chemical composition with lime stone. For the properties of CKD mortar, an increase in flow is observed with an increase in CKD content of 5%, and after that, it decreases. The use of CKD with 5% results in an enhancement of compressive strength. Especially, at 5℃, with an increase of CKD, strength development at early stage is enhanced due to acceleration of hydration react |