Mercury porosimetry: state of the art

Brakel, Jaap Van; Modrý, S.; Svatá, M.

doi:10.1016/0032-5910(81)85001-2

Cited by 253 publications

(122 citation statements)

References 21 publications

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“…To determine the pore size distribution of the samples, mercury porosimetry was applied (van Brakel et al 1981). The investigations were carried out with pressures up to 2 kbar, which allows the evaluation of pore radii of about 0.005 lm.…”

Section: Dimension Stones: Petrophysical Propertiesmentioning

confidence: 99%

Weathering behaviour and construction suitability of dimension stones from the Drei Gleichen area (Thuringia, Germany)

2011

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The construction suitability of a dimension stone depends on its weathering properties along with the petrology and the petrophysical properties. The aim of this study was to evaluate the suitability of the dimension stones from the ''Drei Gleichen'' area for construction and replacement purposes. In total, six sandstones (Ingersleben, Wachsenburg, Hindfelden, Seeberg, Röhnberg, Gleichenberg; Upper Triassic) as well as two carbonates (Wachsenburg sinter; Quaternary, Wandersleben dolomite; Middle Triassic) were analysed. The results from our laboratory and on-site studies of the dimension stones show that rocks from the same stratigraphic layer, like the sandstones from the upper Triassic, can show major differences in their petrophysical and weathering properties. These differences are attributed to their different diagenesis, resulting, e.g. in varying pore space, water balance and strength properties. The pore size distribution can be divided into four different groups based on their occurring maxima and micropore content. The determined water balance properties as well as moisture expansion and salt attack depend on these groups. Next to this, the mineralogical composition significantly influences the weathering resistance. Sandstones with a high content of altered lithoclasts show a high amount of moisture expansion, low strength and, in consequence, a low weathering resistance against salt attack. Based on the results of the present study, an evaluation of construction suitability could be accomplished. From the analysed sandstones, only the Seebergen sandstone is suitable for construction purposes due to its good availability, good strength properties (high compressive and tensile strength, low softening degree) as well as a low porosity. Furthermore, the Wachsenburg sandstone also shows good petrophysical and petrological properties, but exploitable deposits are too sparse to be of commercial interest. From the carbonates, the Wachsenburg sinter shows very suitable rock parameters, but only sparse outcrops occur, which are not appropriate for mining.

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Section: Dimension Stones: Petrophysical Propertiesmentioning

confidence: 99%

Weathering behaviour and construction suitability of dimension stones from the Drei Gleichen area (Thuringia, Germany)

2011

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“…van Brakel et al 1981). The pattern of the pore radii spectrum exhibit for both investigated marbles an unequal porous bimodal distribution of pore sizes (Fig.…”

Section: Pore Space Propertiesmentioning

confidence: 81%

Development and assessment of protective winter covers for marble statuaries of the Schlossbrücke, Berlin (Germany)

Ruedrich¹,

Rieffel²,

Pirskawetz

et al. 2010

Environ Earth Sci

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The present study documents the results of an inter-disciplinary model project that was planned with the aim of developing an innovative winter covering system for marble statuaries located on the Schlossbrücke (Berlin). Such a system would need to fulfil the various requirements for structural stability, aesthetics, climate and practical use. This applied research represents the first complex scientific study of the sustainability of a winter covering system. The study is characterised by the use of complex scientific instruments such as special laboratory analysis and numerical simulation tools. The interaction between the environment and the artefacts in connection with the innovative winter covering structures were studied by extensive climatic monitoring.

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“…The pore size distribution of the rocks was determined by using mercury porosimetry (Brakel et al 1981). The investigations were carried out with pressures up to 2 kbar, which allows the evaluation of pore radii of about 0.005 lm.…”

Section: Pore Radii Distributionmentioning

confidence: 99%

Stability assessment of marble statuaries of the Schlossbrücke (Berlin, Germany) based on rock strength measurements and ultrasonic wave velocities

Ruedrich

Knell

Enseleit³

et al. 2013

Environ Earth Sci

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The degree of weathering in natural stones on buildings and sculptures has been determined for many years in numerous cases by means of ultrasonic measurements. Conclusions concerning the strength of the rock and the type of weathering can thus be drawn. This relationship has not been established for all rock types. Most of the progress utilizing this method has been made in the analysis of marbles, where an increasing degree of weathering shows lower ultrasonic velocities. In the present study, four Carrara marble samples showing similar rock fabrics, but with respect to weathering exhibit considerable differences are investigated. Porosity varies between 0.2 vol. % and ca. 2.4 vol. %, whereby with increasing porosity the pore radii changes as well. Parallel to this the ultrasonic velocities change in dry samples from about 5.5 to 1.6 km/s, respectively. Model calculations reveal that the velocity reduction is caused by cracks with an extremely small aspect ratio of about 0.005 or even less. After a specific loss of strength, however, solution processes can become active, which modify the microcracks and generate an opposite trend. In the process a strong porosity increase correlates to a relatively small velocity reduction. With the presence of water the V p porosity weathering relationship experiences a considerable modification. Parallel to the reduction of the ultrasonic velocities, it was determined that the mechanical strength (compressive strength, flexural strength, etc.) as well as the static Young's modulus is reduced almost equally by a progressive advancement of the weathering front. In one case study dealing with tensile strengths, it was clearly documented how tensile cracks develop and propagate in dependence of the rock fabric. The rock mechanical and ultrasonic velocity data were used for stability assessments applied to the marble statuaries from the Schlossbrücke in Berlin. Stability assessments of the sculpture group 4 reveal that some critical parts must be replaced due to safety reasons.

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Mercury porosimetry: state of the art

Cited by 253 publications

References 21 publications

Weathering behaviour and construction suitability of dimension stones from the Drei Gleichen area (Thuringia, Germany)

Weathering behaviour and construction suitability of dimension stones from the Drei Gleichen area (Thuringia, Germany)

Development and assessment of protective winter covers for marble statuaries of the Schlossbrücke, Berlin (Germany)

Stability assessment of marble statuaries of the Schlossbrücke (Berlin, Germany) based on rock strength measurements and ultrasonic wave velocities

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