Textural Alterations in Coal Fly Ash due to Alkali Activation
| Autor: | Devendra Singh, Nevin Koshy |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Soil Stabilization
Materials science 0211 other engineering and technologies Cement 02 engineering and technology Molecular sieve Geopolymer chemistry.chemical_compound 021105 building & construction General Materials Science Sodium Zeolite Porosity Civil and Structural Engineering Calcium hydroxide Waste management Curing Conditions technology industry and agriculture Systems Surface Area Building and Construction Fly Ash 021001 nanoscience & nanotechnology Alkali metal chemistry Chemical engineering Mechanics of Materials Fly ash Calcium Zeolite Zeolites Particle Size Characterization Particle size Mechanism 0210 nano-technology Porous medium |
| Zdroj: | IndraStra Global. |
| ISSN: | 2381-3652 |
| Popis: | Over the years, coal fly ash has been used as a backfill material in embankments, mines, roads and around pipelines. Recently, there has been a growing interest in its alkali activation for synthesis of both geopolymers and highly porous minerals known as zeolites. These end products find applications as cement admixtures, molecular sieves, and for contaminant depuration in aqueous media. In this regard, the textural characteristics, viz, particle size, pore size, and pore structure distribution characteristics of alkali activated fly ashes elucidate their potential as porous additives to cement and concrete, reactive media in permeable reactive barriers, and sorbents for contaminant removal. With this in view, this study investigates the particle size and pore structure modifications occurring in calcium hydroxide-based activation of coal fly ash. Furthermore, the morphological features also show the effect of alkali interaction on the reduction in larger sized particles and on the steady growth in smaller-sized crystals. (C) 2016 American Society of Civil Engineers. |
| Databáze: | OpenAIRE |
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