Study on Physical and Chemical Properties of Fly Ash from Different Area in Malaysia

2013 ◽  
Vol 594-595 ◽  
pp. 985-989 ◽  
Author(s):  
I. Khairul Nizar ◽  
Abdullah Mohd Mustafa Al Bakri ◽  
A.R. Rafiza ◽  
Hussin Kamarudin ◽  
Alida Abdullah ◽  
...  
Keyword(s):  
Fly Ash ◽  
Amorphous Material ◽  
Chemical Properties ◽  
Spherical Particles ◽  
Chemical Compositions ◽  
Physical And Chemical Properties ◽  
Environmental Friendly ◽  
Physical And Chemical ◽  
Different Sources ◽  
And Chemical Properties

Fly ash is residue from the combustion of coal which widely available in worldwide and lead to waste management proposal. Moreover, the use of fly ash is more environmental friendly and save cost compared to OPC. Fly ash mostly consists of silicon dioxide (SiO2), aluminium oxide (Al2O3) and iron oxide (Fe2O3). The chemical compositions of the sample have been examined according to ASTM C618. Different sources of fly ash may result in different chemical composition. The fly ash is mainly an amorphous material with the presents of crystalline phase of quartz and mullite. Fly ash consists of mostly glassy, hollow and spherical particles.

The Extraction of Main Chemical Compositions in Rumex Root

2011 ◽  
Vol 382 ◽  
pp. 372-374
Author(s):  
Yong Jiang ◽  
Zhi Bin Jiang ◽  
Guo Jie Shao ◽  
Dong Cheng Guo ◽  
Yu Tian ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Chemical Properties ◽  
Ethanol Extract ◽  
Chemical Compositions ◽  
Physical And Chemical Properties ◽  
Experimental Basis ◽  
Development And Utilization ◽  
Physical And Chemical ◽  
Root Methods ◽  
And Chemical Properties

Purpose: The purpose of this study was to study the compositions of the polygonaceae medicinal plants called rumex root. Methods: Solvent method and chromatography was used to purificate the chemical compositions of Rumex, and the molecular structure of the compound was identified by physical and chemical properties and spectral data. Results: Two compounds were obtained from the ethanol extract of rumex root, which were identified as Chrysophanol and Physcione. Conclusions: Experimental basis was provided for the further study of the active ingredients of rumex root and the development and utilization of medical resources.

Monitoring of Fluctuations in the Physical and Chemical Properties of a High-Calcium Fly Ash

1987 ◽  
Vol 113 ◽  
Author(s):  
Scott Schlorholtz ◽  
Ken Bergeson ◽  
Turgut Demirel
Keyword(s):  
Fly Ash ◽  
Chemical Properties ◽  
Operating Conditions ◽  
Physical And Chemical Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Morphological Studies ◽  
High Calcium ◽  
Physical And Chemical ◽  
And Chemical Properties

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.

Influence of Fluidized Fly Ash on the Selected Physical-Mechanical Properties of the Autoclaved Aerated Concrete

2014 ◽  
Vol 899 ◽  
pp. 409-414 ◽  
Author(s):  
Alena Struhárová ◽  
Stanislav Unčík ◽  
Svetozár Balkovic ◽  
Mária Hlavinková
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Amorphous Phases ◽  
Autoclaved Aerated Concrete ◽  
Aerated Concrete ◽  
Free Cao ◽  
Physical And Chemical ◽  
And Chemical Properties

Fluidized fly ash has different physical and chemical properties compared to fly ash emerging from classic combustion. It contains amorphous phases resulting from a dehydration of clay minerals as well as unreacted sorbent of CaCO3, free CaO and anhydrite (CaSO4). Work targets the possibilities of production of an autoclaved aerated concrete (AAC) from fluidized fly ash, and its influence on particular physical-mechanical properties of autoclaved aerated concrete.

Influence of Physical and Chemical Properties on the Activity of Fly Ashes

1987 ◽  
Vol 113 ◽  
Author(s):  
F. Sybertz
Keyword(s):  
Particle Size ◽  
Fly Ash ◽  
Hydrochloric Acid ◽  
Potassium Hydroxide ◽  
Chemical Properties ◽  
Experimental Program ◽  
Physical And Chemical Properties ◽  
Fly Ashes ◽  
Physical And Chemical ◽  
And Chemical Properties

ABSTRACTIn an experimental program, the suitability of various methods for testing the pozzolanic activity of fly ash was investigated. The research was conducted on virtually all fly ashes approved as concrete additives in Germany. This paper discusses differences in the particle size distribution and the solubility on dissolution with hydrochloric acid and potassium hydroxide of the fly ashes. It also reports on interrelationships between the physical and chemical properties of the fly ashes and the workability and strength of mortars containing fly ash.

MICROMORPHOLOGICAL, PHYSICAL, AND CHEMICAL PROPERTIES OF A PODZOLIC SOIL WITH A FRAGIPAN

1974 ◽  
Vol 54 (1) ◽  
pp. 29-38 ◽  
Author(s):  
C. R. DE KIMPE ◽  
J. A. McKEAGUE
Keyword(s):  
Bulk Density ◽  
Podzolic Soil ◽  
Amorphous Material ◽  
Chemical Properties ◽  
Clay Mineralogy ◽  
Physical And Chemical Properties ◽  
Marked Contrast ◽  
Physical And Chemical ◽  
Highly Porous ◽  
And Chemical Properties

The soil had a thick, dark brown, highly porous Podzolic B horizon with a high content of amorphous Fe, Al- organic matter complex material and a low bulk density, underlain abruptly by a dense, gray fragipan with a bulk density of nearly 2 g/cm3. Mean pore diameters of subhorizons within the Podzolic B ranged from about 25 to 120 μm and those of the fragipan were about 0.5 μm. The marked contrast in porosity was consistent both with hydraulic conductivity values of about 20 cm/h in the Podzolic B and 0.2 cm/h in the fragipan, and with the micromorphology. Strongly oriented argillans in the fragipan indicated some clay translocation. The clay mineralogy indicated weak weathering of phyllosilicates, but appreciable weathering of primary minerals must have occurred to produce the amorphous Fe and Al- rich amorphous material in the Podzolic B. Seepage along the surface of the fragipan, and the absence of roots in this layer indicated the significance of this horizon with respect to plant growth and to the water regime of the soil.

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