Title:
RECYCLED FINE POWDER, METHOD FOR RECOVERING THE SAME, CONCRETE COMPOSITION USING THE SAME, AND CLASSIFIER
Document Type and Number:
Japanese Patent JP2012006811
Kind Code:
A
Abstract:
To provide recycled fine powder that contains many components originated from cement hardened body and large amount of calcium hydroxide and is useful as an admixture material for concrete, and a concrete composition formable of a high-strength hardened body in which neutralization is controlled using the recycled fine powder.
The recycled powder is a classified material of demolished concrete powder arising from demolished concrete structures, from which coarse aggregate and fine aggregate were recovered, and contains particles having 10 μm or less of accumulative 50% diameter and 20 μm or less of accumulative 90% diameter. Preferably, the recycled powder contains 4-15 mass% of calcium hydroxide.
Inventors:
IKEO YOSAKU
YONEZAWA TOSHIO
HASUMI TAKASHI
MITSUI TATEO
YONEZAWA TOSHIO
HASUMI TAKASHI
MITSUI TATEO
Application Number:
JP2010146627A
Publication Date:
January 12, 2012
Filing Date:
June 28, 2010
Export Citation:
Assignee:
TAKENAKA KOMUTEN CO
International Classes:
C04B18/16; B02C21/00; B07B7/083; B07B7/10; B09B3/00; B09B5/00; C04B28/02
Domestic Patent References:
| JPH10114556A | 1998-05-06 | |||
| JPH1112003A | 1999-01-19 | |||
| JPH06331794A | 1994-12-02 | |||
| JPH0421550A | 1992-01-24 | |||
| JP2005289673A | 2005-10-20 | |||
| JP2012006812A | 2012-01-12 | |||
| JP2012505150A | 2012-03-01 | |||
| JP2010285303A | 2010-12-24 |
Foreign References:
| WO2010042838A2 | 2010-04-15 |
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Hiroshi Fukuda
Kato Kazunori
Hiroshi Fukuda