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

World Multidisciplinary Earth Sciences Symposium 2017

Koszela-Marek, Ewa^1

Wroclaw University of Science and Technology, Faculty of Civil Engineering Wybrzeze, Wyspianskiego 27, Wroclaw

50-370, Poland^1

关键词: Clay particles;    High pressure;    High pressure chambers;    Laboratory test;    Microstructural alterations;    Soil skeleton;    Specific surface;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/95/2/022020/pdf
DOI  :  10.1088/1755-1315/95/2/022020

来源: IOP

【 摘 要 】

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.