Title:
CEMENT COMPOSITION AND METHOD FOR MANUFACTURING ULTRA-HIGH STRENGTH CEMENTITIOUS HARDENED BODY
Document Type and Number:
Japanese Patent JP2022152433
Kind Code:
A
Abstract:
To increase the compressive strength of an ultra-high strength cementitious hardened body and reduce the shrinkage strain, and to simplify the manufacturing process of an ultra-high strength cementitious hardened body.SOLUTION: A cement composition contains low-heat Portland cement, silica fume with a BET specific surface area of 15-25 m2/g, an inorganic powder with a 50% volume cumulative particle size of 0.8-5 μm, aggregate A with a maximum particle size of 1.2 mm or less, a high-performance water reducing agent, an antifoaming agent and water. To the cement composition, a lightweight aggregate B is further added, in which the lightweight aggregate having a boiling water absorption ratio of 15% or more is made into a saturated water absorption state. An amount of the lightweight aggregate B added is 0.5-2.5 vol.% in a total of 100 vol.% of the aggregate A and the lightweight aggregate B.SELECTED DRAWING: Figure 1
Inventors:
KURONO JOTARO
KONO KATSUYA
KONO KATSUYA
Application Number:
JP2021055209A
Publication Date:
October 12, 2022
Filing Date:
March 29, 2021
Export Citation:
Assignee:
TAIHEIYO CEMENT CORP
International Classes:
C04B28/04; B28B11/24; C04B14/02; C04B14/06; C04B18/14; C04B40/02
Attorney, Agent or Firm:
Takeo Fukuchi
Yoichi Shirakawa
Ryuichi Hayakawa
Yoichi Shirakawa
Ryuichi Hayakawa
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