Improvement on reactivity of cementitious waste materials by mechanochemical activation

Abstract

Combinations of two waste materials were used to develop cementitious material through mechanochemical activation. Activation is accomplished through the use of attrition mill grinding. Energy absorbed by the material on impact may result in a modification of the particle surfaces by introducing dislocations, point defects, and other structural defects. This leads to materials with increased surface free energy, which makes them more reactive. Properties, including X-ray diffraction, initial set of time and particle size distribution, are determined. The results indicate that separate grinding of the two materials is most effective at activating the materials and provide the best properties of the paste. © 2003 Elsevier B.V. All rights reserved.