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Determination of porosity related property changes in bricks after penetration with paraffin
Published in Paul Fazio, Hua Ge, Jiwu Rao, Guylaine Desmarais, Research in Building Physics and Building Engineering, 2020
R. Majdalani, C. Hecht, J. Dreyer
The mercury intrusion porosimetry represents a very fast method to determine the pore-size distribution of a material. The substantial characteristic of this method is the usage of a non-moistening liquid (mercury) for the filling of pore areas. If mercury is in contact with a porous building material, it cannot be taken up, due to its surface tension. There is no wetting. It is possible to fill the cavities of the material by applying an overpressure. The mercury intrusion porosimetry provides very good information about the pore size characteristic.
Expanded Polytetrafluoroethylene Membranes and Their Applications
Published in Maik W. Jornitz, Filtration and Purification in the Biopharmaceutical Industry, 2019
Michael Wikol, Bryce Hartmann, Michael Debes, Cherish Robinson, Scott Ross, Uwe Beuscher
Mercury porosimetry is similar to the water breakthrough test. Mercury, a non-wetting liquid, is forced into the porous structure. The pressure is continually increased forcing the mercury into smaller and smaller pores according to the equation in Figure 20.9. The measured relationship of applied pressure to the volume occupied by mercury leads to a measurement of volumetric pore size distribution. It is important to recognize that the pore-size distribution measured by these two methods differ from each other. Mercury porosimetry is an equilibrium method based on the volume of the pores, whereas capillary flow porometry is a dynamic method based on the flow through the evacuated pores. In addition, the measured pore-size distribution is not only influenced by the pore sizes in the membrane but also by the connectedness of the pores and the experimental protocol, as both will change the sequence in which the pores evacuate (or fill with) the liquid.
Embankments
Published in Bernardo Caicedo, Geotechnics of Roads: Fundamentals, 2018
Mercury porosimetry characterizes a material’s porosity by applying increments of pressure to a sample immersed in mercury. As the mercury’s pressure increases, it begins to intrude into the largest diameter pores. Afterward, as the pressure increases, intrusion continues into pores of smaller diameter as shown in Figure 4.34a.
Characterization of RCAs and their concrete using simple test methods
Published in Journal of Sustainable Cement-Based Materials, 2020
Yogiraj Sargam, Bharath Melugiri Shankaramurthy, Kejin Wang
The RCAs used in this study had higher absorption as compared to that of NA, and this might have affected the total porosity of hardened RACs. In order to analyze this, the ASTM C642 (2013) standard test was performed that can be used to determine the volume of permeable pore space in the concrete. Four 25 mm (1-in.) thick cylindrical concrete specimens (for each mixture) were tested for their oven-dry mass, saturated mass after water-immersion, saturated mass after boiling, and immersed apparent mass. It should be pointed out here that this test method may not be sufficient to quantify the impermeable pore space. High-pressure techniques such as mercury intrusion porosimetry (MIP) are often employed for this purpose. In this study, however, vacuum saturation was performed to fill as many pores as possible so that representative data could be obtained.
Porosimetric features of calcium sulfoaluminate and Portland cement pastes: testing protocols and data analysis
Published in Journal of Structural Integrity and Maintenance, 2018
Seongwon Hong, Kyle de Bruyn, Eric Bescher, Chris Ramseyer, Thomas H.-K. Kang
The porosimetry generally denotes the measurement of porosity-related features of a composite such as the pore size, volume, distribution, and density of a porous material. Since the porosity of a substance is highly related to its physical properties including the adsorption, density, permeability, and strength, understanding the formations and pore structures of porous materials is of considerable importance. However, very little research has been conducted on the porosity of calcium sulfoaluminate ()-based cement. There has been one published paper where the pore structure of and portland cements was analyzed as they changed with time during the hydration process (Bernardo, Telesca, & Valenti, 2006). Mercury intrusion porosimetry was employed to measure the pore volume and size distribution. Although the unique pore structure of cement paste contributing to its early strength properties, relative impermeability, chemical resistance, and other engineering properties was investigated, the analysis of porosity of cement was not enough to fully understand the pore size distribution because other pore analysis techniques to provide data on pore diameters smaller than 10 nm, which can provide valuable insight into the microstructure of cement paste, were required.
Effect of sucrose and citric acid on the quality of explosion puffing dried yellow peach slices
Published in Drying Technology, 2022
Jia Guo, Chun-ju Liu, Yue Li, Jia-xin Liu, Song Jiang, Da-jing Li, Jiang-feng Song, Li-ying Niu, Zhong-yuan Zhang, Min Zhang
The porosity of the EPD yellow peach slices was measured and analyzed using an automatic mercury porosimeter (AutoPore IV 9510; Mecromeritics Instrument Co., Ltd, Norcross, GA, USA). The mercury porosimetry analysis technique is based on the intrusion of mercury into a porous structure under stringently controlled pressure.[29] The pore size was converted by the pressure.[30] The pore diameter range was analyzed from 0.002 to 350 μm, and the pressure ranged from 0.1 to 20,000 psi. Evacuation was targeted at 90 μm Hg. The mercury surface tension was 485 dynes/cm, and the mercury contact angle was 130°. The mercury density was 13.5 g/mL and mercury filling pressure was 0.5 psi.