Cole[26] found at least 98wt% calcite in cores analysed by X-ray diffraction. Geological Survey Bulletin 1248, US Government Printing Office, Washington, http://projects.bre.co.uk/ConDiv/stonelist/stonelist.html, Roels S (2000) Modelling unsaturated moisture transport in heterogeneous limestone. However, most were geological field specimens, and we include here only the three sets of data obtained on quarry stones. Zinc barium borotellurite glasses with the composition 10ZnO-30BaO-30B2O3-(30-x)TeO2 -CeF3 have been fabricated by using the melt-quenching technique hbbd``b``D D /b`03@ l' Simulations were conducted using the immersed boundary method for particle Reynolds numbers of 2070 with an Archimedes number of 23 600. Geological Society, London, pp 3146 (Special Publication), Vzquez P, Alonso FJ, Carrizo L, Molina E, Cultrone G, Blanco M, Zamora I (2013) Evaluation of the petrophysical properties of sedimentary building stones in order to establish quality criteria. Second, wherever possible the bulk volume of the specimen should be calculated by measuring the specimen dimensions, and this value of \(V_{\mathrm {b}}\) compared with the Archimedes value obtained from Eq. Outlier 2 is Ham Hill Lower Bed limestone. PhD thesis, Gttingen, Hughes T, Lott GK, Poultney MJ, Cooper BJ (2013) Portland stone: a nomination for Global Heritage Stone Resource from the United Kingdom. For the outlier Portland specimens 1, 3, there are no mineralogical reasons to expect an abnormal solid density. It is an exceptionally porous material, with f as high as 0.55. Not all published porositydensity data on limestones conform closely to the pattern of Fig. To these, we can add also three high-calcite Spanish limestones for which real density data are given by Vzquez et al. Introduction Porous ceramics are used extensively in high-temperature processes due to low thermal conductivity, high permeability, low density, high specific Purpose of the investigation. Determination of the mass of the dry test samples: The test samples are kept in an oven at 110C over night to ensure that test samples are completely dry. When doing so, the pressure will increase in the enclosure compared to the atmospheric pressure. To estimate the porosity of acoustical facings which have a usual thickness of 1 mm or less and can have a porosity lower than 1% a particular method has been developped by Jaouen & Bcot [JB11]. However some published porositydensity data are inconsistent with the known mineralogy. = ( This is a preview of subscription content, access via your institution. Instead of measuring the pressure increase, one has to equal the volume of the chamber containing the porous sample with the volume of a reference chamber by means of syringes. Right shows the data of Cole and of Allison from Table2. The Archimedes density method and the fracture surface method result in different porosity values but appear to be correlated quite closely for this AM material, The effect of this is to increase slightly the mineral density, so that calcite containing 1.5 mol% Mg has a density of 2715kg/m3, compared with 2709kg/m3 for pure calcite. However there is broad agreement that the calcite content of Portland stone is generally at least 95wt%.
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