Impact of Exposure to Pressure of 50 MPa on the Specific Surface Area of Clay

The paper presents results of laboratory tests conducted to determine the impact of pressure of 50 MPa on specific surface area of clay. These tests were carried out in an original, high-pressure test stand. The specific surface area of clay extracted directly from an open pit mine was compared with...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2017-12, Vol.95 (2), p.22020
Main Author: Koszela-Marek, Ewa
Format: Article
Language:English
Subjects:
Clay
Laboratory tests
Microstructure
Open pit mining
Pressure
Pressure chambers
Specific surface
Surface area
Test stands
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Summary:The paper presents results of laboratory tests conducted to determine the impact of pressure of 50 MPa on specific surface area of clay. These tests were carried out in an original, high-pressure test stand. The specific surface area of clay extracted directly from an open pit mine was compared with the specific surface area of the same clay subjected to the pressure of 50 MPa in a high-pressure chamber. The study found that the specific surface area of the clay subjected to the pressure of 50 MPa increased distinctly by over 35 %. The increase in specific surface can be a result of changes in the microstructure of clay particles and microstructural alteration in the soil skeleton, caused by the pressure.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/95/2/022020