Title:
METHOD FOR USING CEMENTITIOUS MIXTURE CONTAINING FLY ASH
Document Type and Number:
Japanese Patent JP2552983
Kind Code:
B2
Abstract:
PURPOSE: To improve water permeability by once solidifying an aq. suspension contg. a cementitious mixture consisting of alkaline earth metal hydroxides, fly ashes and alkaline earth metal sulfites, then crushing the mixture to granular shapes.
CONSTITUTION: Exhaust gases of power plants are introduced into a limestone slurry to prepare the slurry contg. the alkaline earth metal sulfites and sulfates such as CaSO3.1/2H2O and CaSO4.2H2O. A prescribed amt. of the fly ashes are added to this slurry and after the moisture thereof is adjusted, lime is incorporated therein to obtain the slurry contg. 30 to 90% cementitious mixture consisting of 25 to 70wt.% (hereafter %) alkaline earth metal hydroxides, such as Ca(OH)2, 0.25 to 70% alkaline earth metal sulfites (contg. partly, sulfate) and 10 to 99.5% fly ashes. This slurry is pressurized and once solidified to 10 to 60kg/cm2 compressive strength after natural drying or moisture adjustment. The solidified mixture is then crushed and a gravel-like building material having the water permeability of 0.075 to 4.76mm grain sizes is obtd.
Inventors:
YAMAMOTO MICHIAKI
NAGAYA YOJI
NAGAYA YOJI
Application Number:
JP13906592A
Publication Date:
November 13, 1996
Filing Date:
May 29, 1992
Export Citation:
Assignee:
MITSUI CONSTR
International Classes:
C04B7/26; C04B7/34; C04B11/30; C04B18/06; E01C3/00; E02D3/10; B09B3/00; (IPC1-7): C04B7/26; B09B3/00; C04B7/34; C04B11/30; C04B18/06; E01C3/00; E02D3/10
Domestic Patent References:
| JP5710057B2 |
Other References:
【文献】 永井彰一郎編新しい工業材料の科学新軽量建設材料昭和49年8月30日金原出版株式会社発行89~92頁
Attorney, Agent or Firm:
Kinichi Kitamura (2 others)
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