ABSTRACT The consideration of planetary ball mill processing is attempted to obtain modified fly ashes powders that are used as substitutes in a cement paste. Ball milling conditions are related to structural modifications of processed... more
ABSTRACT The consideration of planetary ball mill processing is attempted to obtain modified fly ashes powders that are used as substitutes in a cement paste. Ball milling conditions are related to structural modifications of processed powders. These modifications are retrieved from X-ray diffraction, infrared spectroscopy, powder granulometry, and scanning electron microscopy. As an industrial application, the milled fly ashes are substituted to two different cements to show possible effect on compressive strength of cement pastes. Structural analysis of milled fly ashes show loss of crystallinity of the magnetite phase, nanosizing trend of quartz and mullite phases with some straining that takes place after only 1 h of milling. The drop of particle size of the milled fly ashes is also evidenced but with tendency to agglomeration and particle shape modification from spherical to irregular forms. Mechanical performance results related to modified cement pastes indicate successful substitution of cements by milled fly ashes up to 50%. Substitution results in levels of compressive strength as large as 70 MPa for particular combination of milling time, fly ash content and curing time.
Research Interests: Materials Engineering, Mechanical Engineering, Materials Science, Nanomaterials, Structural Analysis, and 14 moreSupplementary Cementitious Materials, Compressive Strength, Cement, Materials Design, Fly Ash, Ball Mill, Elsevier, Mécanosynthèse, Ball Milling, Cement Paste, Milled fly ashes, Cement Substitution, Nanomaterials in Construction Materials, and Clinker
Research Interests:
The consideration of planetary ball mill processing is attempted to obtain modified fly ashes powders that are used as substitutes in a cement paste. Ball milling conditions are related to structuralmodifications of processed powders.... more
The consideration of planetary ball mill processing is attempted to obtain modified fly ashes powders that are used as substitutes in a cement paste. Ball milling conditions are related to structuralmodifications of processed powders. Thesemodifications are retrieved fromX-ray diffraction, infrared spectroscopy, powder granulometry, and scanning electronmicroscopy. As an industrial application, themilled fly ashes are substituted to two differ- ent cements to show possible effect on compressive strength of cement pastes. Structural analysis of milled fly ashes show loss of crystallinity of the magnetite phase, nanosizing trend of quartz and mullite phases with somestraining that takes place after only 1 h of milling. The drop of particle size of the milled fly ashes is also ev- idenced but with tendency to agglomeration and particle shapemodification from spherical to irregular forms. Mechanical performance results related tomodified cement pastes indicate successful substitution of cements by milled fly ashes up to 50%. Substitution results in levels of compressive strength as large as 70MPa for particular combination ofmilling time, fly ash content and curing time.