TY - JOUR A1 - Klobes, Peter A1 - Riesemeier, Heinrich A1 - Meyer, Klaus A1 - Goebbels, Jürgen A1 - Hellmuth, k.-H. T1 - Rock porosity determination by combination of X-ray computerized tomography with mercury porosimetry JF - Fresenius' journal of analytical chemistry N2 - Abstract First results are described of coupling of mercury porosimetry with X-ray computerized tomography (CT) as a new combination technique for rock porosity studies. This technique is suitable for rock samples with a pronounced mercury intrusion-extrusion hysteresis and includes CT measurements before and after mercury intrusion. The entrapped portion of mercury, when the pressure after the intrusion into the rock sample is reduced to 0.1 MPa, serves as a contrast agent in the porous network to localize spatial distribution of rock porosity by CT. The results obtained show that the mercury intrusion and therefore the porosity were quite different for the separate mineral phases. Therefore the combination of mercury porosimetry and computer tomography can give 3-D data on mineral-specific porosity distributions with additional pore size information. In contrast to mercury porosimetry as a single method, results of the combination technique with CT represent a direct visualization of porosity variation and do not depend on any special pore network model. PY - 1997 SN - 0937-0633 VL - 357 IS - 5 SP - 543 EP - 547 PB - Springer CY - Berlin AN - OPUS4-11970 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -