This website uses cookies. You have the possibility to transfer personal data on this website. Your website visit can be evaluated by external companies. Find out more in our privacy policy.

 

Hg porosimetry

Hg porosimetry determines the pore volume based on the volume of mercury injected into a specimen under increasing pressure. The volume of mercury that is pressed in directly gives the pore volume that is reached. With increasing pressures, smaller and smaller pore radii are reached. According to the Washburn equation (Washburn 1921) it is possible from this relationship to calculate - for a non-wetting fluid such as Hg - the reached pore size for each presure level an consequently a frequency distribution of the pore radii:

D = (1/P)*4γ*cosφ

where D is pore diameter, P is the applied pressure, γ the surface tension of mercury, and φ the contact angle between the mercury and the sample.

A A A
                                Login
 

News

Gesteinslabor does numerous strength tests for NAGRA

In September Gesteinslabor was awarded by NAGRA with UCS, Brazilian and triaxial tests on neighbouring rocks of the Opalinus Clay - the rock which will host Switzerland's future facilities for nuclear waste disposal. The testing program commenced in November.

Read more …