Study of Rice Husk Ash as Potential Source of Acid Resistance Calcium Silicate
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In this paper, acid resistant calcium silicate has been synthesized from silica of rice husk and calcium oxide of analytical grade using Sol-Gel technique to obtain calcium silicates hydrate gels.Abstract:
In present work acid resistant calcium silicate has been synthesized from silica of rice husk and calcium oxide of analytical grade. The silica from rice husk was extracted at 550oC in amorphous form and then allowed to react with calcium oxide in the presence of excess water by Sol-Gel technique to obtain calcium silicate hydrate gels. The molar ratios of Si/Ca were adjusted each time to obtain silica rich calcium silicate hydrates. The gels were dried in oven and calcined in muffle furnace at various temperatures to obtain acid resistant calcium silicate. The products were tested by analytical technique and by FTIR and XRD machines. Studies show that at higher molar ratio of Si/Ca, the heat treatment improves the acid resistivity of calcium silicate whereas at lower molar ratios the heat treatment does not make it acid resistant.read more
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References
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Book
Introduction to Spectroscopy
TL;DR: In this paper, the authors present an overview of the basic concepts of one-dimensional NMR, including spin spin-spin coupling, spin-spin coupling, Heteronuclear coupling with other nuclei, and 13C coupling constants.
Book ChapterDOI
Introduction to Spectroscopy
TL;DR: In this article, the electromagnetic spectrum in Figure 1 illustrates the many different types of electromagnetic radiation, including gamma rays (γ-rays), X-rays, ultraviolet (UV) radiation, visible light, infrared (IR), microwaves, and radio waves.
Journal ArticleDOI
Rice husk ash as an alternate source for active silica production
TL;DR: In this paper, a procedure for obtaining and characterization active silica with a high specific surface area from rice husk ash was developed, and the relative amount of silica was increased after burning out the carbonaceous material at different times and temperatures.
Journal ArticleDOI
A structural investigation relating to the pozzolanic activity of rice husk ashes
TL;DR: A structural study of RHA samples in relation to their reactivity has been performed; Silica in RHA formed by burning rice husk in a laboratory furnace under continuous supply of air have been characterized as a function of incineration temperature, time and cooling regime as mentioned in this paper.
Journal ArticleDOI
Sulfate resistance of blended cements containing fly ash and rice husk ash
TL;DR: In this article, the sulfate resistance of blended Portland cement with fly ash and ground rice husk ash (RHA) was studied, and it was shown that RHA was more effective than fly ash in reducing the expansion of the mortar bars and the pH values.
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