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Study of Gypsum Dehydration by Controlled Transformation Rate
Study of Gypsum Dehydration by Controlled Transformation Rate Thermal Analysis ... of water vapor using Controlled transformation Rate Thermal Analysis .
[ 1-s2.0-S0022459698977970-main.pdf?_tid=0675f832-b0bd-11e4-85b6-00000aab0f6c&acdnat=1423528843_cf85e039826dd201e09acb9b90925bff - Read/Download File

Kinetics of gypsum dehydration - ScienceDirect.com
INTRODUCTION The dehydration of gypsum is a complex operation involving .... Study of Gypsum Dehydration by Controlled Transformation Rate Thermal ...
[ 1-s2.0-004060318285154X-main.pdf?_tid=21c6f3ac-f5d3-11e3-b5f6-00000aab0f6b&acdnat=1402977470_4545c398e417d371189038994713dc2c - Read/Download File

Thermal dehydration kinetics of phosphogypsum - digital-csic Digital
The aim is to study the thermal behavior of two different phosphogypsum sources (Spain and ...... controlled transformation rate thermal analysis (CRTA). J.
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Dehydration behavior of FGD gypsum by simultaneous TG and DSC
Experimental data of non-isothermal analysis have been fitted with two 'model- free' ...... Study of gypsum dehydration by controlled transformation rate thermal ...
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THE EFFECT OF WATER VAPOR UPON THE DEHYDRATION OF
The dehydration of calcium sulphate dihydrate (gypsum) has been studied for decades ..... iVhile changes in the rates of other transformations of calcium sulphate .... Controlled-rate thermal analysis kinetic study in thermal dehydration of ...
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Thermal Analysis - ACS Publications - American Chemical Society
Thermal analysis has been used to study artistic materials (19) and especially the .... capable of EGA at controlled transformation rate, with stepwise isothermal runs, and ... DTA to give information on dehydration (69) and phase transition. ( 70). ..... DSC can be used to determine gypsum and the hemihydrate in cement ( 336).
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Atomistic Observation of Phase Transitions in - ACS Publications
Sep 8, 2015 ... ABSTRACT: The detailed study of phase transition processes among various calcium sulfates ... the phase transformation γ-CaSO4 → β-CaSO4 → CaO is induced by electron beam ... sulfates distinguished by the degree of dehydration: gypsum ..... Controlled Transformation Rate Thermal Analysis (CRTA).
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Kinetics of gypsum dehydration at reduced pressure: an energy
The first analysis of the process ... early study of the kinetics of dehydration of gypsum was ..... Dehydration by Controlled Transformation Rate Thermal. Analysis ...
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Handbook of thermogravimetric system of minerals and its use in
Measurement methods and system of thermal reaction of minerals . .... Sample controlled Thermal Analysis (or controlled rate Thermal Analysis) .
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The pressure dependence of the dehydration of gypsum to bassanite
dehydration reaction, and the method is likely to be of use for other reactions. ... gypsum to the hemihydrate mineral bassanite at pressures ... In the study of the stability ... to the potential thermal expansion of the water ... gramme was placed under the control of the logger ... but rose monotonically at a rate which increased .
[ 51-361-453.pdf - Read/Download File

Dehydration of Gypsum Rock by Solar Energy: Preliminary Study
Jul 12, 2014 ... The dehydration process of gypsum rock was studied under concentrated .... source as solar thermal energy for obtaining plaster from the calcination of gypsum rock. ... To study the influence of the grain size in the transformation of ... The lens movement from east to west is controlled automatically by a ...
[ GM_2014070715501437.pdf - Read/Download File

English (pdf) - SciELO
Characterization of Single Superphosphate Powders – a study of Milling. Effects on ..... As the first gypsum dehydration step corresponds to a mass loss of .... Journal of Controlled Release. 1987 ... transformation rate thermal analysis ( CRTA).
[ 1516-1439-mr-1980-5373-MR-2015-0401.pdf - Read/Download File

Infiltration Kinetics of Wetting in a Building Plaster and the Effect of
Jan 25, 2013 ... technique (the so-called tensiometry) to study the behavior of plaster during .... ( after about 5 minutes to a mixing ratio water-gypsum plaster: ..... “Study of gypsum dehydration by controlled transformation rate thermal analysis.
[ 282743.pdf - Read/Download File

BRINE MIGRATION EXPERIMENTAL STUDIES FOR SALT
interlayer water dehydration from corrensite would release 13 wt % water. ... C. In situ XRD analysis of gypsum transformation as a result of heating shows an ... gypsum in the sample due to the slow rates of gypsum to bassanite transformation. ... The velocity of the brine migration is highly dependent on 1) the thermal.
[ BrineMigrationinExpermntsSaltR1.pdf - Read/Download File

Experimental VNIR reflectance spectroscopy of gypsum dehydration
The spectral behavior of gypsum dehydration in the visible to near-infrared (350– 2500 nm) wave- length range was ... evaporite sequences and hydrothermal systems. ... The primary goal of this study is to document the visible ..... Electron backscatter diffraction (EBSD) analysis of bassanite transformation textures and ...
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the stability of gypsum and anhydrite - [email protected]
anhydrite could be distinguished by differential thermal analysis. These determinations .... TEMPERATURE CONTROL PANEL.. ........ 84 ... and (3) what transformations have they undergone since their ... perimental study of gypsum and its dehydration products in ..... solubility of anhydrite decreases at a more rapid rate after.
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View
involved in the transformation of gypsum (74.53 cm3/mol) to bassanite (53.17 ... terms of a reference study we chose an experimental strategy ... effect on dehydration was controlled by weighing the sam- ... At steady‐state, flow rate was measured at four ... heat the center of the sample to the oven temperature. In the.
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Experimental dehydration kinetics of serpentinite using pore
The reaction rate of intact specimens of initially near-zero porosity was constant up to 50–80% ... transformation approached completion. .... studies of gypsum dehydration (Ko et al., 1995, 1997;. Olgaard .... modal analysis of the starting material is: lizardite. 95 ± 3% .... water pressure was controlled at a value near 120 MPa.
[ 2007_Llana-Funez et al JMG.pdf - Read/Download File

the gypsum-anhydrite equilibrium at one atmosphere pressure1
It follows that the dehydration of gypsum to anhydrite, at atmospheric pressure, is a ... the gypsum-anhydrite conversion rates were found to be relatively ... study to very dilute solutions only, a considerabie disa,dva,ntage bece-"use ... that used in hydrothermal work was employed. ... in thermostaticallv controlled water-baths.
[ AM52_171.pdf - Read/Download File

Permeability of gypsum samples dehydrated in air - Wiley Online
involved in the transformation of gypsum (74.53 cm3/mol) to bassanite (53.17 ... terms of a reference study we chose an experimental strategy ... effect on dehydration was controlled by weighing the sam- ... At steady‐state, flow rate was measured at four ... and fluid properties (air density, viscosity, heat capacity, and.
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