Title:
自己治癒性重量コンクリート、プレキャストコンクリート、及び自己治癒性重量コンクリートの製造方法
Document Type and Number:
Japanese Patent JP6760754
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a self-healing heavy concrete that is applicable to a containment vessel for radiation shielding in which it is difficult to repair a crack after the construction of the containment vessel and that has improved water cut-off performance.SOLUTION: The self-healing heavy concrete is produced by blending a powder containing cement, fly ash and an expansive admixture, water and a heavyweight aggregate. In this case, a weight ratio between the water and the powder is 17 to 40%. Also fly ash of 120 to 200 kg and the expansive admixture of 30 to 80 kg are blended per volume of 1 cubic meter. Further the expansive admixture is activated by being vapor cured after removal of forms. Thereby heavy concrete can be self-healed around 21 days even when the crack has 0.2 mm width or less and has an initial permeated water amount of about 0.30 cm/s or less.SELECTED DRAWING: Figure 4
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Inventors:
Hideo Eguchi
Hideki Ikawa
Hideki Ikawa
Application Number:
JP2016077095A
Publication Date:
September 23, 2020
Filing Date:
April 07, 2016
Export Citation:
Assignee:
Nippon Hume Co., Ltd.
International Classes:
C04B28/02; B28B1/20; C04B16/06; C04B18/08; C04B22/06; C04B22/14; C04B40/02; G21C13/08; G21F1/04
Domestic Patent References:
| JP2014231450A | ||||
| JP62275049A | ||||
| JP2003267765A | ||||
| JP2014185044A | ||||
| JP2007246308A | ||||
| JP2014148446A | ||||
| JP2014001129A | ||||
| JP2011057520A |
Attorney, Agent or Firm:
Shiroyuki Hori
Yukihiko Maejima
Akira Hasegawa
Daiyu Murakami
Taku Ogawa
Yukihiko Maejima
Akira Hasegawa
Daiyu Murakami
Taku Ogawa