Title:
天然粘土鉱物砕石遮水材の締め固め度の品質管理方法
Document Type and Number:
Japanese Patent JP5828918
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a low water-permeability crushed stone material of a natural clay mineral, which has uniform quality and is inexpensive and with which water can be shut off permanently, and to provide a method for measuring density of the same.SOLUTION: In a low water-permeability crushed stone material of a natural clay mineral, in crushed stones formed from the natural clay material containing smectite and having grain diameters of 25 mm or less, natural moisture content ratio is adjusted within a range where an upper limit value is set to the optimum moisture ratio or less and a lower limit value is set to the optimum moisture ratio -10% or more, or is adjusted within a range where a coefficient of water permeability, subjected to moisture content ratio adjustment, is 1×10cm/sec or less. Further, density of the crushed stones formed from the natural clay material containing the smectite and having the grain diameters of 25 mm or less is measured with a handy typed bearing capacity tester (CASPOL).
Inventors:
Hajime Nakamura
Seiichi Narishima
Seiichi Narishima
Application Number:
JP2014003751A
Publication Date:
December 09, 2015
Filing Date:
January 10, 2014
Export Citation:
Assignee:
Hojun Co., Ltd.
Seiichi Narishima
Seiichi Narishima
International Classes:
G01N33/24; B09B1/00; C01B33/40; E02B17/02
Other References:
市川隆文 ほか,衝撃加速度法を用いたベントナイト混合土の品質管理について,土木学会第57回年次学術講演会,2002年 9月,265-266
Attorney, Agent or Firm:
Patent business corporation glory patent office
Yuriko Hamada
Hironori Honda
Yuriko Hamada
Hironori Honda
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