Effect of Mechanochemical Activation on Reactivity of Cement Kiln Dust-Fly Ash Systems

摘要

Combinations of cement kiln dust and fly ash were used to develop cementitious material through mechanochemical activation. Mixture combinations made with two different proportions were subjected to various grinding regimes to activate the material. Properties, including panicle size distribution, initial time of set, heat of hydration, and compressive strength of the new material were determined. Mechanical grinding resulted in mechanochemical activation of the material, with vibratory grinding more effective than ball mill grinding. Activation was confirmed through X-ray diffraction analysis and no correlation was found between activation and the mean particle size of the material. Although not all the properties of the material tested were comparable to those of portland cement, the results indicate the potential for significant improvement.