Last edited by Gujas
Saturday, May 16, 2020 | History

2 edition of Microwave methods for measuring the setting time of plaster of Paris. found in the catalog.

Microwave methods for measuring the setting time of plaster of Paris.

Anil Bhusan Mukherji

Microwave methods for measuring the setting time of plaster of Paris.

by Anil Bhusan Mukherji

  • 350 Want to read
  • 4 Currently reading

Published in Bradford .
Written in English


Edition Notes

M.Sc.thesis. Typescript.

SeriesTheses
The Physical Object
Pagination1vol
ID Numbers
Open LibraryOL13694556M

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Microwave methods for measuring the setting time of plaster of Paris by Anil Bhusan Mukherji Download PDF EPUB FB2

Unless you are already experienced and have an eye for the right amounts, always weigh the plaster and use a calibrated jug, etc., for measuring the water, using the water to powder ratios shown in brackets in the left hand column of the table below, e.g.

Fine Casting Plaster () requires litres (i.e. g) of water for every kilogram. three methods investigated, only time of saturation varied. To further investigate saturation time for different sample sizes, 21 more samples with different sizes were tested (using the simple.

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The main constituent of gypsum-based products, including plasters and dental stones, is calcium sulfate hemihydrate (CaSO4½H 2 O) or [2(CaSO 4)H 2 O].

As gypsum is in the form of dihydrate calcium sulfate (CaSO 4 2H 2 O), in order to produce calcium sulfate hemihydrate, first gypsum is crushed and milled and then exposed to heat at °C–°C (°F–°F) in order to lose Author: Touraj Nejatian, Touraj Nejatian, Pegah Firouzmanesh, Azeem Ul Yaqin Syed.

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If the surface is very rough or uneven, grinding or preparation with plaster of Paris or quick-setting mortar may be necessary to provide a smooth surface for transducer application. It is also important that readings are repeated by complete removal and re-application of transducers to obtain a minimum value for the transit time (T).

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Thus, the reaction. Measurement of setting time started from the time when the gypsum powder was added to the water and end of setting time was determined when the needle first failed to penetrate the specimen to a depth of 2 mm (n = 3). Loss of gloss time as an initial setting time was measured when the gloss disappeared from the gypsum surface (n = 3).

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