title: Evaluation the pozzolanic reactivity of sonochemically fabricated nano natural pozzolan.
abstract: Natural pozzolans are appropriate supplementary cementitious materials in cement and concrete industry. A simple sonochemical method was developed to synthesize nanostructures of natural pozzolan. Chemical composition, crystallinity, morphology and reactivity of the natural pozzolan samples were compared before and after the sonochemical process, by using powder X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Thermal Gravimetry and Differential Thermal Analysis (TG/DTA). Compressive strength tests were performed to evaluate the properties of blended cements incorporating nano natural pozzolan. Under optimized conditions, the nano natural pozzolans showed a superior reactivity as compared with the bulk natural pozzolan. Also higher compressive strength was obtained for the cement specimen incorporating nano natural pozzolan.
authors.affiliation: Department of Concrete, Building and Housing Research Center (BHRC), P.O. Box 13145-1696, Tehran, Iran. askarinejada@hotmail.com
authors.forename: Azadeh
authors.initials: A
authors.lastname: Askarinejad
authors.forename: Ali Reza
authors.initials: AR
authors.lastname: Pourkhorshidi
authors.forename: Tayebeh
authors.initials: T
authors.lastname: Parhizkar
mesh_terms: D007220:Industrial Waste; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D033362:Powder Diffraction; D013499:Surface Properties; D014465:Ultrasonics
chemical_list: D007220:Industrial Waste