You are not logged in Total: 7journals, 20,213articles Online
AccountAccount
Login / Register
Forgot Login?
 
Main menuMain menu
What's new
Journal list
Visiting ranking
Phrase ranking
Polls
About us
 
SearchSearch
 
Journal Site
Advanced Search
 

Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.66  No.8 (2017)  >  pp.574-581

Journal of the Society of Materials Science, Japan
<<Previous article Vol.66  No.8 (2017)   pp.574 - 581 Next article>>

Total utilization of Shirasu as construction materials through dry gravity classification and pulverization

Kenichi SODEYAMA1), Atsushi TOMOYOSE2), Takafumi NOGUCHI2), Kazuro HIGASHI3)
1) Kagoshima prefectural institute of industrial technology. 2) The University of Tokyo, Graduate School of Engineering. 3) Principle Co.,Ltd.

“Shirasu” is a whitish sand found in pyroclastic flow deposits that includes a crystal mineral and an amorphous silicate. It has the properties of both a fine aggregate and a mineral admixture owing to its pozzolanic reaction. To utilize Shirasu as industrial resource, separation of the amorphous silicate and the crystal mineral is required. It is shown in this study that dry gravity classification is effective for dividing Shirasu into the crystal mineral and pumice, and can be used to obtain the amorphous silicate. This paper reports fundamental experiments on a high-strength concrete with a pulverized fine Shirasu powder used as a mineral admixture. In particular, fine Shirasu powder comprising the amorphous silicate pulverized to a particle size of 1μm exhibited high performance as mineral admixture equivalent to that of silica fume.




Keyword:
Shirasu, Pyroclastic flow deposite, Gravity classification, Pulverization, Roller mill, Jet mill, Glass content, Amorphous silicate, Pozzolanic reaction, Strength of concrete

Received: January 10, 2017
Published online: August 20, 2017

PDFPDF file (J-STAGE)J-STAGEJ-STAGE


SPARC Japan

Terms of Use | Privacy Policy