The Experts below are selected from a list of 104025 Experts worldwide ranked by ideXlab platform
D. Ryu - One of the best experts on this subject based on the ideXlab platform.
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experimental investigation of Dry Density effects on dielectric properties of soil water mixtures with different specific surface areas
Acta Geotechnica, 2020Co-Authors: A. Orangi, Guillermo A Narsilio, Yuhsing Wang, D. RyuAbstract:The dielectric constant of soil is used to estimate its water content in a range of applications. Unlike the widely known effect of water content on the soil dielectric constant (consistent direct proportionality), only a limited number of studies have reported the effects of soil Dry Density, however, with equivocal results. This paper, therefore, investigates the effects of Dry Density or degree of compaction on the dielectric constant of five different soil types. The results of the experimental work for the soils ranging from sand to Bentonite clay with distinct specific surface areas were evaluated based on the use of two simple mixture models (De Loor and Birchak). The effects of Dry Density on the soil dielectric constant were found to be soil type dependent. This is demonstrated by the experimental data and further proven by the modified De Loor model. The behavior is shown to be defined by the changes in the free water, bound water, and solid particle volume fractions, ultimately controlled by the soil specific surface area. The dielectric constant changes from being directly proportional to Dry Density to inversely proportional at a threshold specific surface area of between 122 and 147 m2/g. Supported by the experimental observations, parametric analysis has revealed that the range for the dielectric constant of bound water was found to be 9–37, while the geometrical parameter α in the Birchak model was found to be 0.4–0.8.
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Experimental investigation of Dry Density effects on dielectric properties of soil–water mixtures with different specific surface areas
Acta Geotechnica, 2019Co-Authors: A. Orangi, Guillermo A Narsilio, Y H Wang, D. RyuAbstract:The dielectric constant of soil is used to estimate its water content in a range of applications. Unlike the widely known effect of water content on the soil dielectric constant (consistent direct proportionality), only a limited number of studies have reported the effects of soil Dry Density, however, with equivocal results. This paper, therefore, investigates the effects of Dry Density or degree of compaction on the dielectric constant of five different soil types. The results of the experimental work for the soils ranging from sand to Bentonite clay with distinct specific surface areas were evaluated based on the use of two simple mixture models (De Loor and Birchak). The effects of Dry Density on the soil dielectric constant were found to be soil type dependent. This is demonstrated by the experimental data and further proven by the modified De Loor model. The behavior is shown to be defined by the changes in the free water, bound water, and solid particle volume fractions, ultimately controlled by the soil specific surface area. The dielectric constant changes from being directly proportional to Dry Density to inversely proportional at a threshold specific surface area of between 122 and 147 m^2/g. Supported by the experimental observations, parametric analysis has revealed that the range for the dielectric constant of bound water was found to be 9–37, while the geometrical parameter α in the Birchak model was found to be 0.4–0.8.
A. Orangi - One of the best experts on this subject based on the ideXlab platform.
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experimental investigation of Dry Density effects on dielectric properties of soil water mixtures with different specific surface areas
Acta Geotechnica, 2020Co-Authors: A. Orangi, Guillermo A Narsilio, Yuhsing Wang, D. RyuAbstract:The dielectric constant of soil is used to estimate its water content in a range of applications. Unlike the widely known effect of water content on the soil dielectric constant (consistent direct proportionality), only a limited number of studies have reported the effects of soil Dry Density, however, with equivocal results. This paper, therefore, investigates the effects of Dry Density or degree of compaction on the dielectric constant of five different soil types. The results of the experimental work for the soils ranging from sand to Bentonite clay with distinct specific surface areas were evaluated based on the use of two simple mixture models (De Loor and Birchak). The effects of Dry Density on the soil dielectric constant were found to be soil type dependent. This is demonstrated by the experimental data and further proven by the modified De Loor model. The behavior is shown to be defined by the changes in the free water, bound water, and solid particle volume fractions, ultimately controlled by the soil specific surface area. The dielectric constant changes from being directly proportional to Dry Density to inversely proportional at a threshold specific surface area of between 122 and 147 m2/g. Supported by the experimental observations, parametric analysis has revealed that the range for the dielectric constant of bound water was found to be 9–37, while the geometrical parameter α in the Birchak model was found to be 0.4–0.8.
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Experimental investigation of Dry Density effects on dielectric properties of soil–water mixtures with different specific surface areas
Acta Geotechnica, 2019Co-Authors: A. Orangi, Guillermo A Narsilio, Y H Wang, D. RyuAbstract:The dielectric constant of soil is used to estimate its water content in a range of applications. Unlike the widely known effect of water content on the soil dielectric constant (consistent direct proportionality), only a limited number of studies have reported the effects of soil Dry Density, however, with equivocal results. This paper, therefore, investigates the effects of Dry Density or degree of compaction on the dielectric constant of five different soil types. The results of the experimental work for the soils ranging from sand to Bentonite clay with distinct specific surface areas were evaluated based on the use of two simple mixture models (De Loor and Birchak). The effects of Dry Density on the soil dielectric constant were found to be soil type dependent. This is demonstrated by the experimental data and further proven by the modified De Loor model. The behavior is shown to be defined by the changes in the free water, bound water, and solid particle volume fractions, ultimately controlled by the soil specific surface area. The dielectric constant changes from being directly proportional to Dry Density to inversely proportional at a threshold specific surface area of between 122 and 147 m^2/g. Supported by the experimental observations, parametric analysis has revealed that the range for the dielectric constant of bound water was found to be 9–37, while the geometrical parameter α in the Birchak model was found to be 0.4–0.8.
Reiner Dohrmann - One of the best experts on this subject based on the ideXlab platform.
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about differences of swelling pressure Dry Density relations of compacted bentonites
Applied Clay Science, 2015Co-Authors: Stephan Kaufhold, Wiebke Baille, Tom Schanz, Reiner DohrmannAbstract:Abstract The swelling capacity is one of the most characteristic properties of bentonites. This property, along with others, made bentonite a candidate material for the safe disposal of high-level radioactive waste (HLRW). For HLRW-barrier systems the swelling pressure is of particular interest because it basically controls sealing properties (a large swelling pressure generally results in low permeability). Commonly, the swelling pressure is investigated as a function of compaction and hence plotted against the Density, usually the Dry Density. Different Dry Density/swelling pressure relations of bentonites were published. Therefore, the aim of the present study was to identify reasons for these differences. To be able to compare a significant set of different bentonites, a small scale swelling pressure device was developed which is based on measuring a swelling pressure related value of 500 mg bentonite powder. This device allowed recording about 200 single values (in duplicate) and hence Dry Density/swelling pressure relations of thirty six different bentonites. The differences of the Dry Density/swelling pressure plots of different bentonites could be explained by i) different ways to obtain a range of Dry densities (either constant load or constant water content), ii) different portions of uncompactable porosity of the different bentonites, and iii) different smectite contents.
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About differences of swelling pressure — Dry Density relations of compacted bentonites
Applied Clay Science, 2015Co-Authors: Stephan Kaufhold, Wiebke Baille, Tom Schanz, Reiner DohrmannAbstract:Abstract The swelling capacity is one of the most characteristic properties of bentonites. This property, along with others, made bentonite a candidate material for the safe disposal of high-level radioactive waste (HLRW). For HLRW-barrier systems the swelling pressure is of particular interest because it basically controls sealing properties (a large swelling pressure generally results in low permeability). Commonly, the swelling pressure is investigated as a function of compaction and hence plotted against the Density, usually the Dry Density. Different Dry Density/swelling pressure relations of bentonites were published. Therefore, the aim of the present study was to identify reasons for these differences. To be able to compare a significant set of different bentonites, a small scale swelling pressure device was developed which is based on measuring a swelling pressure related value of 500 mg bentonite powder. This device allowed recording about 200 single values (in duplicate) and hence Dry Density/swelling pressure relations of thirty six different bentonites. The differences of the Dry Density/swelling pressure plots of different bentonites could be explained by i) different ways to obtain a range of Dry densities (either constant load or constant water content), ii) different portions of uncompactable porosity of the different bentonites, and iii) different smectite contents.
Guillermo A Narsilio - One of the best experts on this subject based on the ideXlab platform.
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experimental investigation of Dry Density effects on dielectric properties of soil water mixtures with different specific surface areas
Acta Geotechnica, 2020Co-Authors: A. Orangi, Guillermo A Narsilio, Yuhsing Wang, D. RyuAbstract:The dielectric constant of soil is used to estimate its water content in a range of applications. Unlike the widely known effect of water content on the soil dielectric constant (consistent direct proportionality), only a limited number of studies have reported the effects of soil Dry Density, however, with equivocal results. This paper, therefore, investigates the effects of Dry Density or degree of compaction on the dielectric constant of five different soil types. The results of the experimental work for the soils ranging from sand to Bentonite clay with distinct specific surface areas were evaluated based on the use of two simple mixture models (De Loor and Birchak). The effects of Dry Density on the soil dielectric constant were found to be soil type dependent. This is demonstrated by the experimental data and further proven by the modified De Loor model. The behavior is shown to be defined by the changes in the free water, bound water, and solid particle volume fractions, ultimately controlled by the soil specific surface area. The dielectric constant changes from being directly proportional to Dry Density to inversely proportional at a threshold specific surface area of between 122 and 147 m2/g. Supported by the experimental observations, parametric analysis has revealed that the range for the dielectric constant of bound water was found to be 9–37, while the geometrical parameter α in the Birchak model was found to be 0.4–0.8.
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Experimental investigation of Dry Density effects on dielectric properties of soil–water mixtures with different specific surface areas
Acta Geotechnica, 2019Co-Authors: A. Orangi, Guillermo A Narsilio, Y H Wang, D. RyuAbstract:The dielectric constant of soil is used to estimate its water content in a range of applications. Unlike the widely known effect of water content on the soil dielectric constant (consistent direct proportionality), only a limited number of studies have reported the effects of soil Dry Density, however, with equivocal results. This paper, therefore, investigates the effects of Dry Density or degree of compaction on the dielectric constant of five different soil types. The results of the experimental work for the soils ranging from sand to Bentonite clay with distinct specific surface areas were evaluated based on the use of two simple mixture models (De Loor and Birchak). The effects of Dry Density on the soil dielectric constant were found to be soil type dependent. This is demonstrated by the experimental data and further proven by the modified De Loor model. The behavior is shown to be defined by the changes in the free water, bound water, and solid particle volume fractions, ultimately controlled by the soil specific surface area. The dielectric constant changes from being directly proportional to Dry Density to inversely proportional at a threshold specific surface area of between 122 and 147 m^2/g. Supported by the experimental observations, parametric analysis has revealed that the range for the dielectric constant of bound water was found to be 9–37, while the geometrical parameter α in the Birchak model was found to be 0.4–0.8.
Stephan Kaufhold - One of the best experts on this subject based on the ideXlab platform.
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about differences of swelling pressure Dry Density relations of compacted bentonites
Applied Clay Science, 2015Co-Authors: Stephan Kaufhold, Wiebke Baille, Tom Schanz, Reiner DohrmannAbstract:Abstract The swelling capacity is one of the most characteristic properties of bentonites. This property, along with others, made bentonite a candidate material for the safe disposal of high-level radioactive waste (HLRW). For HLRW-barrier systems the swelling pressure is of particular interest because it basically controls sealing properties (a large swelling pressure generally results in low permeability). Commonly, the swelling pressure is investigated as a function of compaction and hence plotted against the Density, usually the Dry Density. Different Dry Density/swelling pressure relations of bentonites were published. Therefore, the aim of the present study was to identify reasons for these differences. To be able to compare a significant set of different bentonites, a small scale swelling pressure device was developed which is based on measuring a swelling pressure related value of 500 mg bentonite powder. This device allowed recording about 200 single values (in duplicate) and hence Dry Density/swelling pressure relations of thirty six different bentonites. The differences of the Dry Density/swelling pressure plots of different bentonites could be explained by i) different ways to obtain a range of Dry densities (either constant load or constant water content), ii) different portions of uncompactable porosity of the different bentonites, and iii) different smectite contents.
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About differences of swelling pressure — Dry Density relations of compacted bentonites
Applied Clay Science, 2015Co-Authors: Stephan Kaufhold, Wiebke Baille, Tom Schanz, Reiner DohrmannAbstract:Abstract The swelling capacity is one of the most characteristic properties of bentonites. This property, along with others, made bentonite a candidate material for the safe disposal of high-level radioactive waste (HLRW). For HLRW-barrier systems the swelling pressure is of particular interest because it basically controls sealing properties (a large swelling pressure generally results in low permeability). Commonly, the swelling pressure is investigated as a function of compaction and hence plotted against the Density, usually the Dry Density. Different Dry Density/swelling pressure relations of bentonites were published. Therefore, the aim of the present study was to identify reasons for these differences. To be able to compare a significant set of different bentonites, a small scale swelling pressure device was developed which is based on measuring a swelling pressure related value of 500 mg bentonite powder. This device allowed recording about 200 single values (in duplicate) and hence Dry Density/swelling pressure relations of thirty six different bentonites. The differences of the Dry Density/swelling pressure plots of different bentonites could be explained by i) different ways to obtain a range of Dry densities (either constant load or constant water content), ii) different portions of uncompactable porosity of the different bentonites, and iii) different smectite contents.
