Pore Size Distribution Patterns in Tropical Soils Obtained by Mercury Intrusion Porosimetry: The Multifractal Approach

Capturing the long-term performance of concrete must be underpinned by a detailed understanding of the pore structure. Mercury intrusion porosimetry (MIP) is a widely used technique for pore structure characterization. However, it has been proven inappropriate to measure the pore size distribution of cementitious materials due to the ink-bottle effect. MIP with cyclic pressurization–depressurization can overcome the ink-bottle effect and enables a distinction between large (ink-bottle) pores and small (throat) pores. In this paper, pressurization–depressurization cycling mercury intrusion porosimetry (PDC-MIP) is adopted to characterize the pore structure in a range of cementitious pastes cured from 28 to 370 days. The results indicate that PDC-MIP provides a more accurate estimation of the pore size distribution in cementitious pastes than the standard MIP. Bimodal pore size distributions can be obtained by performing PDC-MIP measurements on cementitious pastes, regardless of the age. Water–binder ratio, fly ash and limestone powder have considerable influences on the formation of capillary pores ranging from 0.01 to 0.5 µm.

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Hydraulic conductivity of clay mixed with nanomaterials

Canadian Geotechnical Journal ◽

10.1139/cgj-2014-0313 ◽

2015 ◽

Vol 52 (6) ◽

pp. 808-811 ◽

Cited By ~ 20

Author(s):

C.W.W. Ng ◽

J.L. Coo

Keyword(s):

Hydraulic Conductivity ◽

Aluminum Oxide ◽

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Mercury Intrusion Porosimetry ◽

Flow Paths ◽

Mercury Intrusion ◽

Flexible Wall ◽

Conductivity Behavior

The focus of this note is to investigate the hydraulic conductivity behavior of clay mixed with nanomaterials. Two different nanomaterials — namely, gamma-aluminum oxide powder (γ-Al2O3) and nano-copper oxide (CuO) — were selected and mixed with clay at different percentages (i.e., 2%, 4%, and 6%). Hydraulic conductivity tests were carried out in a flexible wall permeameter following the ASTM D5084 standard. Mercury intrusion porosimetry (MIP) tests were also carried out to determine the pore-size distribution. At 2% of γ-Al2O3 and nano-CuO, the hydraulic conductivity of clay decreased 30% and 45%, respectively. As the proportion of the nanomaterial increases, the reduction of hydraulic conductivity becomes less prominent as flow paths devoid of nanomaterials are unlikely. Reduction of hydraulic conductivity is due to the pores of clay being clogged by the nanomaterial. Pore-size distribution curves show that the largest pore size reduced by 20% when clay was mixed with 4% nano-CuO.

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Pore Size Distribution of Rocks Determined by Mercury Intrusion Porosimetry

Journal of the Japan Society of Engineering Geology ◽

10.5110/jjseg.57.201 ◽

2016 ◽

Vol 57 (5) ◽

pp. 201-212 ◽

Cited By ~ 2

Author(s):

Weiren LIN ◽

Manabu TAKAHASHI ◽

Daisaku SATO ◽

En-Chao YEH ◽

Yoshitaka HASHIMOTO ◽

...

Keyword(s):

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Mercury Intrusion Porosimetry ◽

Mercury Intrusion

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Physical parameters of Fluvisols on flooded and non-flooded terraces

International Agrophysics ◽

10.1515/intag-2016-0026 ◽

2017 ◽

Vol 31 (1) ◽

pp. 73-82 ◽

Cited By ~ 3

Author(s):

Milena Kercheva ◽

Zofia Sokołowska ◽

Mieczysław Hajnos ◽

Kamil Skic ◽

Toma Shishkov

Keyword(s):

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Mercury Intrusion Porosimetry ◽

Water Retention Curve ◽

Anthropogenic Factors ◽

Physical Parameters ◽

Water Desorption ◽

Mercury Intrusion ◽

The Impact

Abstract The heterogeneity of soil physical properties of Fluvisols, lack of large pristine areas, and different moisture regimes on non-flooded and flooded terraces impede the possibility to find a soil profile which can serve as a baseline for estimating the impact of natural or anthropogenic factors on soil evolution. The aim of this study is to compare the pore size distribution of pristine Fluvisols on flooded and non-flooded terraces using the method of the soil water retention curve, mercury intrusion porosimetry, nitrogen adsorption isotherms, and water vapour sorption. The pore size distribution of humic horizons of pristine Fluvisols on the non-flooded terrace differs from pore size distribution of Fluvisols on the flooded terrace. The peaks of textural and structural pores are higher in the humic horizons under more humid conditions. The structural characteristics of subsoil horizons depend on soil texture and evolution stage. The peaks of textural pores at about 1 mm diminish with lowering of the soil organic content. Structureless horizons are characterized by uni-modal pore size distribution. Although the content of structural pores of the subsoil horizons of Fluvisols on the non-flooded terrace is low, these pores are represented by biopores, as the coefficient of filtration is moderately high. The difference between non-flooded and flooded profiles is well expressed by the available water storage, volume and mean radius of pores, obtained by mercury intrusion porosimetry and water desorption, which are higher in the surface horizons of frequently flooded Fluvisols.

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Effects of freezing-thawing and cyclic loading on pore size distribution of silty clay by mercury intrusion porosimetry

Cold Regions Science and Technology ◽

10.1016/j.coldregions.2017.11.002 ◽

2018 ◽

Vol 145 ◽

pp. 185-196 ◽

Cited By ~ 16

Author(s):

Zhong-Liang Zhang ◽

Zhen-Dong Cui

Keyword(s):

Cyclic Loading ◽

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Mercury Intrusion Porosimetry ◽

Silty Clay ◽

Mercury Intrusion

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Chloride Permeability Of Concrete Containing A Flyash And A Blastfurnace Slag

MRS Proceedings ◽

10.1557/proc-137-411 ◽

1988 ◽

Vol 137 ◽

Cited By ~ 7

Author(s):

Mitsunori Kawamura ◽

Kazuyuki Torii

Keyword(s):

Portland Cement ◽

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Mercury Intrusion Porosimetry ◽

Chloride Permeability ◽

Curing Conditions ◽

Mercury Intrusion ◽

Blastfurnace Slag ◽

Low Humidity

AbstractThe effects of curing conditions on the chloride permeability of concrete with various replacements of Portland cement by a flyash and a blastfurnace slag was investigated. In order to relate the porosity and pore size distribution of concretes to their chloride permeability, mercury intrusion porosimetry measurements were also conducted. The results showed that exposure of concretes to a relatively low humidity at early ages increased their chloride permeability. It was also found that the chloride permeability of concrete increased proportionally with increasing volume of pores larger than 0.1 μm in diameter.

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POROSITY AND PORE SIZE DISTRIBUTION OF RECENT AND ANCIENT BURIED PHOEBE ZHENNAN WOOD DETERMINED BY MERCURY INTRUSION POROSIMETRY

Wood Research ◽

10.37763/wr.1336-4561/66.2.277284 ◽

2021 ◽

Vol 66 (2) ◽

pp. 277-284

Author(s):

Jialin Zhang ◽

Hui Xiao ◽

Yuzhu Chen ◽

Jinqiu Qi ◽

Jiulong Xie

Keyword(s):

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Pore Diameter ◽

Mercury Intrusion Porosimetry ◽

Sorption Behaviour ◽

Mercury Intrusion ◽

Pore Area ◽

Phoebe Zhennan ◽

Ancient Buried Wood

The porosity and pore size distribution of recent and ancient buried Phoebe zhennan are studied in this paper by means of mercury intrusion porosimetry. The results show that the micropore and mesopore diameters of recent and buried wood are mainly distributed in range of 40.3 nm and 183.1 nm respectively, while the macropore in 45276.6 nm and 3503.9 nm separately. For both samples, the pores with diameters below 349.9 nm account for about 60% of the total intrusion volume, and contribute more than 98% of the surface area. The cumulative pore area of recent wood is slightly greater and the pore diameter ranges from 50.3 nm to 349.9 nm. While the cumulative pore area of buried wood is significantly larger than and the pore diameter ranges until 50.3 nm. These results can provide information for further investigations on the sorption behaviour and the liquid permeability of ancient buried wood.

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The processing of Pinus radiata: Pore size distribution changes in the cell wall structure studied by pressure plate technique and mercury intrusion porosimetry

BioResources ◽

10.15376/biores.14.2.2827-2841 ◽

2019 ◽

Vol 14 (2) ◽

pp. 2827-2841

Author(s):

Dante Giacomozzi ◽

Olli Joutsimo ◽

Samuel L. Zelinka

Keyword(s):

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Cell Walls ◽

Mercury Intrusion Porosimetry ◽

Mercury Porosimetry ◽

Wall Structure ◽

Pressure Plate ◽

Mercury Intrusion ◽

Plate Technique

The pore size distribution of cell walls in softwood pulps was studied using the pressure plate technique and mercury intrusion porosimetry, which together make it possible to cover the range from 101 to 106 nm in pore sizes (mesopores and macropores). The differences in pore size distribution between never-dried pulp from a fiber line, industrially-dried pulp, and laboratory-dried pulps were evaluated. The results showed an increase in the relative pore volume (100 to 2,000 nm) between industrial washing and bleaching stages. Also, mercury porosimetry showed a broadening of the pore size distribution of cell walls after industrial drying. Results showed that, besides the changes in micropore and mesopore size distributions, the macropore range is also affected by processing and drying.

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