Title:
速硬コンクリート
Document Type and Number:
Japanese Patent JP7383525
Kind Code:
B2
Abstract:
To provide quick-hardening concrete that exhibits early material age even under low temperature environments, can be demolded, and has high resistance to sulfate.SOLUTION: Quick-hardening concrete comprises: high-early-strength Portland cement; a hardening accelerator comprising calcium nitrate and/or calcium nitrite; a polymer for cement admixture; an aggregate; and water, wherein: a total unit quantity of the calcium nitrate and calcium nitrite in the hardening accelerator is 4-8 kg/m3; a unit quantity of the polymer for cement admixture is 30-63 kg/m3 in terms of solid content; and the amount of water is 18-35 pts.mass based on 100 pts.mass of the high-early-strength Portland cement.SELECTED DRAWING: None
Inventors:
Akiya Okada
Yasushi Nagashio
Yasushi Nagashio
Application Number:
JP2020033066A
Publication Date:
November 20, 2023
Filing Date:
February 28, 2020
Export Citation:
Assignee:
Taiheiyo Materials Co., Ltd.
International Classes:
C04B28/04; C04B22/08; C04B24/26
Domestic Patent References:
| JP2009132558A | ||||
| JP2019142732A | ||||
| JP2019112276A | ||||
| JP62000561A | ||||
| JP2015067491A | ||||
| JP2018076190A | ||||
| JP2008087978A | ||||
| JP6199555A | ||||
| JP2020158371A |
Foreign References:
| US5340385 | ||||
| US4337094 |
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