Abstract
The coal fly ash mechano-chemical activation conducted via high energy ultra-centrifugal mill was optimized using mathematical and statistical tools. The aim of the investigation was to accent the merits of alternations in ash processing schemes with a referral regarding the enhancement of the ash reactivity that will lead to its higher volume utilization as a cement replacement in concrete design. The impact of the processing parameters sets (number of rotor revolutions, current intensity, activation period, circumferential rotor speed, mill capacity) on the on the product?s quality factors (grain size distribution, average grain size, micronization level, agglomeration tendency, specific surface area) was assessed via Response surface method, Standard score analysis and Principal component analysis in order to obtain the most favorable output. Developed models were able to meticulously predict quality parameters in an extensive range of processing parameters. The calculated r2 values were in the range of 0.846-0.999. The optimal ash sample, that reached the Standard Score as high as 0.93, was produced using a set of processing parameters appropriate to experimental sequence with applied 120 ?m sieve mesh. The microstructural characteristics were assessed using image-processing values and histogram plots of the activated fly ash SEM images.
Highlights
The contemporary construction trade is confronted with problems regarding depleting and potential deficiency of natural resources, and imperiled environmental safely
The assets of different ash processing schemes are emphasized, and a specific attention was paid on enhancing of the ash reactivity to achieve its high volume utilization in concrete design
The main purpose of the investigation was to optimize the ash activation via ultra-centrifugal mill using mathematical and statistical tools
Summary
The contemporary construction trade is confronted with problems regarding depleting and potential deficiency of natural resources, and imperiled environmental safely. Concrete is the most commonly utilized building composite due to its strength, durability, resistance to atmospheric, chemical, and thermal impacts. Portland cement with its global fabrication rate of 3.6 billion metric tones per year is the base for concrete production [1]. Since cement production is prone to CO2 emission, there is a huge risk of atmospheric pollution. A task of sustainability has been imposed on the building industry, which means that cement and concrete fabrications have to become cost-effective, energy efficient, A. Terzić et al /Science of Sintering, 49 (2017) 381-397
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
