Title:
A freezing-and-thawing-resistance low contraction AE concrete constituent and its hardening object
Document Type and Number:
Japanese Patent JP5975716
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a freeze-thaw resistance low shrinkage AE concrete composition capable of obtaining a hardened body having a dry shrinkage rate reduced to ≤400 micro, and having excellent freeze-thaw resistance; and to provide a hardened body obtained by hardening the composition.SOLUTION: In an AE concrete composition including high-early-strength portland cement, water, fine aggregate, coarse aggregate, a drying shrinkage reducing agent, a cement dispersant and an air amount adjusting agent, a specific drying shrinkage reducing agent is used at the rate of a unit amount of 7-30 kg/m, and the unit amount ratio determined from expression 1: unit amount ratio (%)=(unit amount of water+unit amount of drying shrinkage reducing agent)/(unit amount of early strength portland cement)×100 (%), is controlled in the range of 30-43%.
Inventors:
Kazumasa Inoue
Kenro Mitsui
Hidehito Shiigai
Toshiyuki Sato
Mitsuo Kinoshita
Kazuhide Saito
Ryuhei Kobayashi
Kenro Mitsui
Hidehito Shiigai
Toshiyuki Sato
Mitsuo Kinoshita
Kazuhide Saito
Ryuhei Kobayashi
Application Number:
JP2012101248A
Publication Date:
August 23, 2016
Filing Date:
April 26, 2012
Export Citation:
Assignee:
TAKENAKA CORPORATION
Takemoto Yushi Co., Ltd.
Takemoto Yushi Co., Ltd.
International Classes:
C04B28/04; C04B18/14; C04B24/00; C04B24/02; C04B24/26; C04B24/32; C04B24/34; C08F220/28
Domestic Patent References:
| JP2010006662A | ||||
| JP2009249228A | ||||
| JP1226757A | ||||
| JP58074552A | ||||
| JP2011006305A | ||||
| JP11180747A | ||||
| JP2001294466A |
Attorney, Agent or Firm:
Hiromasa Iriyama
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