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Title:
RAPID AGING METHOD FOR STEEL SLAG
Document Type and Number:
Japanese Patent JP2011105519
Kind Code:
A
Abstract:

To provide a rapid aging method for steel slag, which has high effect to slag exhibiting the expansion of f-MgO base among steel slag, and can perform treatment in a short time.

The rapid aging method is performed to steel slag for the roadbed of a road or for an asphalt mixture securing expansion stability less than the standard value in JIS shown in Fig.1 regarding the steel slag with f-MgO as a factor. The steel slag is subjected to aging treatment by hydration reaction treatment with saturated water vapor of 1.0 to 2.0 MPa. By the aging treatment as hydration reaction treatment to the expansion properties of the steel slag in which, particularly, f-MgO becomes an expansion factor in the steel slag, e.g. for reducing the ratio of the slag in which the soaked expansion coefficient before the aging of about 3.0% to ≤1.5%, the aging treatment is performed for less than 4 hr as hydration reaction treatment which has been required for 6 hr in the saturated water vapor of 0.5 MPa.


Inventors:
ICHIHARA AKIE
Application Number:
JP2009258890A
Publication Date:
June 02, 2011
Filing Date:
November 12, 2009
Export Citation:
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Assignee:
SANYO SPECIAL STEEL CO LTD
International Classes:
C04B5/00; C21C5/28; C21C5/52; F27D15/00
Domestic Patent References:
JP2005061863A2005-03-10
JPH06206743A1994-07-26
JPH0834643A1996-02-06
JPH10152364A1998-06-09
Attorney, Agent or Firm:
Kenji Yokoi
Yokoi Satoshi