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http://dx.doi.org/10.4334/JKCI.2016.28.5.593

The Strength Characteristics of Activated Multi-Component Cement with Kaolinite  

Kim, Tae-Wan (Research Institute of Industrial Technology (RIIT), Pusan National University)
Kim, Im-Gon (Department of Civil Engineering, Pusan National University)
Publication Information
Journal of the Korea Concrete Institute / v.28, no.5, 2016 , pp. 593-600 More about this Journal
Abstract
The paper presented investigates the effects of kaolinite on strength properties of alkali-activated multi-component cement. The binders of this study was blended of ground granulated blast furnace slag (GGBFS), fly ash (FA), silica fume (SF) and kaolinite (KA). In this study, the specimens of combination of 20%~70% GGBFS, 10%~60% FA, 10% SF (constant ratio) and 10%~50% KA binder were used for strength properties tests. The water/binder ratio was 0.5. The binders (GGBFS + FA + SF + KA) was activated by sodium hydroxide (NaOH) and sodium silicate ($Na_2SiO_3$) was 10% by total binder weight (10% NaOH + 10% $Na_2SiO_3$). The research carried out is on the compressive strength, water absorption, ultrasonic pulse velocity (UPV) and X-ray diffraction (XRD). The compressive strength decreased as the contents of KA increase. One of the major reason for this is the low reactivity of KA compared with other raw materials used as precursors such as GGBFS or FA. The presence of remaining KA indicates that the initially used quantity has not fully reacted during hydration. Moreover, the results have indicated that increased of KA contents decreased UPV under all experimental conditions. The drying shrinkage and water absorption increased as the content of KA increase. Test result clearly showed that the strength development of multi-component blended cement were significantly dependent on the content of KA and GGBFS.
Keywords
Kaolin; Alkali-activated Cement; Ground Granulated Blast Furnace Slag; Fly Ash; Multi-Component Cement;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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