Dielectric and Spectroscopic Studies of A Fly Ash Blended Cement Paste
- K. Thiruppathi
- S. Barathan
- N. Anandhan
- D. Govindarajan
Abstract
The dielectric constant (?') of Sulfate Resisting Portland Cement (SRPC) blended with 30% of fly ash by addition ismeasured using microwave bench at 9.54 GHz, for initial 30 hours of hydration. The heat of hydration for the same
blend using heat of solution calorimetry is also measured. It is observed that contrary to the usual trend of retarding of
fly ashes, it shows an accelerating trend with increasing strength as times passes. SEM micrographs and XRD patterns
are also recorded and observed that C4Al2SO16 (C4A3S¯) is found to be responsible for the accelerating trend of the mix.
The hydration process in the early period is studied and it is suggested that suitable retarder should be adopted for the
effective utilization.
Cement chemistry notations: C=CaO, A=Al2O3, S¯=SO3, H=H2O, F=Fe2O3, S=SiO2
- Full Text: PDF
- DOI:10.5539/ijc.v2n1p212
This work is licensed under a Creative Commons Attribution 4.0 License.
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