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Influences of PSD curve and vibration on the packing dry density of crushed bentonite pellet mixtures.

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Title: Influences of PSD curve and vibration on the packing dry density of crushed bentonite pellet mixtures.
Authors: Zhang, Zhao1, Ye, Wei-Min1,2 ye_tju@tongji.edu.cn, Liu, Zhang-Rong1, Chen, Bao1, Cui, Yu-Jun1,3
Source: Construction & Building Materials. Oct2018, Vol. 185, p246-255. 10p.
Subjects: Bentonite, Radioactive wastes, Mixing ratio (Atmospheric chemistry), Vibration (Mechanics), Particle size distribution
Abstract: Crushed high-density bentonite pellet mixture has been proposed for filling up gaps in the deep geological repository for disposal of high-level radioactive waste (HLW), due to its swelling capacity and easily to be handled. In this regard, for the long term safety evaluation of a deep geological repository, it is of great importance to investigate the packing behavior of the crushed bentonite pellet mixtures for achieving an adequate bulk dry density of the engineering barrier system. In the present work, crushed high-density GMZ bentonite pellets (1.94–1.95 Mg/m 3 ) with different sizes were produced. Particle size distribution (PSD) curves of pellet mixtures were established using the distribution modulus method (DMM) and the mixing ratio method (MRM). A series of packing density tests were conducted by free fall packing with or without vibration. Results show that the PSD curves of pellet mixtures had great influences on the packing dry density, which first increased and then turned to decrease with increasing distribution modulus q (or the coarse/fine mass ratio α cf ). In the meantime, vibration during packing process can significantly improve the packing dry density and this vibration effect is relative to the composition of the pellet mixture. [ABSTRACT FROM AUTHOR]
Copyright of Construction & Building Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 131091503
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Influences of PSD curve and vibration on the packing dry density of crushed bentonite pellet mixtures.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Zhao%22">Zhang, Zhao</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ye%2C+Wei-Min%22">Ye, Wei-Min</searchLink><relatesTo>1,2</relatesTo><i> ye_tju@tongji.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Liu%2C+Zhang-Rong%22">Liu, Zhang-Rong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+Bao%22">Chen, Bao</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Cui%2C+Yu-Jun%22">Cui, Yu-Jun</searchLink><relatesTo>1,3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Construction+%26+Building+Materials%22">Construction & Building Materials</searchLink>. Oct2018, Vol. 185, p246-255. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Bentonite%22">Bentonite</searchLink><br /><searchLink fieldCode="DE" term="%22Radioactive+wastes%22">Radioactive wastes</searchLink><br /><searchLink fieldCode="DE" term="%22Mixing+ratio+%28Atmospheric+chemistry%29%22">Mixing ratio (Atmospheric chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Vibration+%28Mechanics%29%22">Vibration (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+size+distribution%22">Particle size distribution</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Crushed high-density bentonite pellet mixture has been proposed for filling up gaps in the deep geological repository for disposal of high-level radioactive waste (HLW), due to its swelling capacity and easily to be handled. In this regard, for the long term safety evaluation of a deep geological repository, it is of great importance to investigate the packing behavior of the crushed bentonite pellet mixtures for achieving an adequate bulk dry density of the engineering barrier system. In the present work, crushed high-density GMZ bentonite pellets (1.94–1.95 Mg/m 3 ) with different sizes were produced. Particle size distribution (PSD) curves of pellet mixtures were established using the distribution modulus method (DMM) and the mixing ratio method (MRM). A series of packing density tests were conducted by free fall packing with or without vibration. Results show that the PSD curves of pellet mixtures had great influences on the packing dry density, which first increased and then turned to decrease with increasing distribution modulus q (or the coarse/fine mass ratio α cf ). In the meantime, vibration during packing process can significantly improve the packing dry density and this vibration effect is relative to the composition of the pellet mixture. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Construction & Building Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.conbuildmat.2018.07.096
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 246
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      – SubjectFull: Bentonite
        Type: general
      – SubjectFull: Radioactive wastes
        Type: general
      – SubjectFull: Mixing ratio (Atmospheric chemistry)
        Type: general
      – SubjectFull: Vibration (Mechanics)
        Type: general
      – SubjectFull: Particle size distribution
        Type: general
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      – TitleFull: Influences of PSD curve and vibration on the packing dry density of crushed bentonite pellet mixtures.
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            NameFull: Zhang, Zhao
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            NameFull: Ye, Wei-Min
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            NameFull: Liu, Zhang-Rong
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            NameFull: Chen, Bao
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            NameFull: Cui, Yu-Jun
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              M: 10
              Text: Oct2018
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              Y: 2018
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