Influence of fly ash on hydration compounds of high-volume fly ash concrete
| Autor: | Ch. N. Satish Kumar, M. Kanta Rao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Cement
Alite Materials science x-ray diffraction (xrd) and energy dispersion spectroscopy Metallurgy Tobermorite engineering.material compressive strength Durability Portlandite chemistry.chemical_compound Compressive strength hvfa concrete chemistry Fly ash engineering upv TA401-492 rcpt Belite acid resistance Materials of engineering and construction. Mechanics of materials scanning electron microscopy |
| Zdroj: | AIMS Materials Science, Vol 8, Iss 2, Pp 301-320 (2021) |
| ISSN: | 2372-0484 |
| DOI: | 10.3934/matersci.2021020?viewType=HTML |
| Popis: | Development of sustainable materials has become one common goal across the globe to meet the ever-increasing demand for the construction materials. High volume fly ash (HVFA) concrete is one such sustainable construction material which utilizes fly ash in concrete as a partial replacement of cement. Though the existing literature focuses abundantly on high volume fly ash concrete, the present work aimed to explore the intricate hydration process thorough a systematic experimental program. A series of experiments including compressive strength, rapid chloride permeability, UPV, acid resistance, X-ray diffraction, SEM and EDAX were performed to examine the effect of varying proportions of fly ash (0%, 20%, 40%, 60%) on cement replacement. Analysis of results indicated formation of hydration compounds in the form of alite, belite, celite, portlandite and tobermorite (C-S-H gel). Results of mechanical and durability tests showed that, to achieve maximum benefits, cement can be replaced to an optimum value of fly ash of 40%. The authors believe that the formation of hydration compounds tobermorite and celite resulted in attaining enhanced durability and strength in high volume fly ash concrete. |
| Databáze: | OpenAIRE |
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