Physical and Chemical Behavior and Environmental Acceptability of Stabilized Scrubber Sludge and Fly Ash in Seawater

ABSTRACTThe physical and chemical properties of fly ash produced at Ottumwa Generating Station have been monitored since April, 1985. The fly ash is produced from burning a low sulfur, sub-bituminous coal obtained from the Powder River Basin near Gillette, Wyoming. One-hundred and sixty samples of fly ash were obtained during the two year period. All of the samples were subjected to physical testing as specified by ASTM C 311. About one-hundred of the samples were also subjected to a series of tests designed to monitor the self-cementing properties of the fly ash. Many of the fly ash samples were subjected to x-ray diffraction and fluorescence analysis to define the mineralogical and chemical composition of the bulk fly ash as a function of sampling date. Hydration products in selected hardened fly ash pastes, were studied by x-ray diffraction and scanning electron microscopy. The studies indicated that power plant operating conditions influenced the compressive strength of the fly ash paste specimens. Mineralogical and morphological studies of the fly ash pastes indicated that stratlingite formation occurred in the highstrength specimens, while ettringite was the major hydration product evident in the low-strength specimens.

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Physical and chemical changes in coal fly ash during acidic or neutral wastes treatment, and its’ effect on the fixation process

Fuel ◽

10.1016/j.fuel.2016.06.107 ◽

2016 ◽

Vol 184 ◽

pp. 69-80 ◽

Cited By ~ 19

Author(s):

Roy Nir Lieberman ◽

Xavier Querol ◽

Natalia Moreno ◽

Yitzhak Mastai ◽

Haim Cohen

Keyword(s):

Fly Ash ◽

Coal Fly Ash ◽

Chemical Changes ◽

Physical And Chemical

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Influence of Peripheral Groups on the Physical and Chemical Behavior of Cinchona Alkaloids

The Journal of Physical Chemistry B ◽

10.1021/jp906538g ◽

2009 ◽

Vol 113 (34) ◽

pp. 11696-11701 ◽

Cited By ~ 37

Author(s):

Jinfeng Lai ◽

Zhen Ma ◽

Larry Mink ◽

Leonard J. Mueller ◽

Francisco Zaera

Keyword(s):

Cinchona Alkaloids ◽

Chemical Behavior ◽

Physical And Chemical

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OPTIMIZATION OF THE USE OF FLY ASH AS AN ADDITIVE PORTLAND COMPOSITE CEMENT (PCC)

SPEKTRA Jurnal Fisika dan Aplikasinya ◽

10.21009/spektra.042.02 ◽

2019 ◽

Vol 4 (2) ◽

pp. 61-72 ◽

Cited By ~ 1

Author(s):

Leni Rumiyanti ◽

Listiani Listiani ◽

Tika Damayanti

Keyword(s):

Fly Ash ◽

Setting Time ◽

Quality Analysis ◽

Insoluble Residue ◽

Optimum Conditions ◽

Free Lime ◽

Composite Cement ◽

Ideal Composition ◽

Physical And Chemical ◽

The Ideal

Research has been carried out on the optimization of the use of Lahat Fly Ash as an Additive Portland Composite Cement (PCC) which aims to determine the optimum conditions for adding Lahat fly ash to produce cement with physical and chemical requirements in accordance with SNI 7064:2014 and discover the ideal composition of cement with fly additions Lahat ash from various cement compositions. The quality analysis in making PCC cement is chemically in the form of Insoluble Residue (IR), Loss of Ignition (LOI), and free lime (FCaO) as well as the quality of physics in the form of Blaine, setting time, and cement mortar compressive strength. The results obtained after the process of making PCC cement with the addition of 14% Lahat fly ash, namely PCC cement in optimum conditions with physical and chemical requirements in accordance with SNI 7064: 2014 where the ideal composition of PCC cement manufacture is 14% Lahat fly ash, clinker 62%, 3% gypsum, 18% limestone, and 3% pozzolans in making PCC cement. Therefore, Lahat fly ash can be used as an alternative mixture in making PCC cement.

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