Hydrothermal solidification of CaCO3

Makoto Kotama; Takeyuki Yamamoto; Osamu Watanabe; Hideki Ishida

doi:10.2109/jcersj.105.660

Hydrothermal solidification of CaCO₃

Makoto Kotama, Takeyuki Yamamoto, Osamu Watanabe, Hideki Ishida

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The possibility of the solidification of CaCO₃ with saving energy consumption was discussed in the system CaCO₃-CaO-SiO₂ (88.2 :1.8 : 10.0 mass%). Two kinds of bodies - "calcination system" where CaO was supplied from partially calcined CaCO₃ at 800°C for 3h and "addition system" where CaO was added - were prepared and hydrothermally processed under the saturated vapor pressure at 150-200°C for 2-10h. In the calcination system, flexural strength of the body cured at 150°C for 10h or at 200°C for 5h showed 9 MPa which was three times higher than that in the addition system. The strength was controlled by the formed fibrous or lath-like C-S-H gels and C-S-H gels in the calcination system gave larger volume and more uniform distribution than in the addition system. Some parts of C-S-H gels were formed from CaCO₃ and 13% of CaCO₃ was observed to react in the calcination system at 150°C for 10h or at 200°C for 5h curing.

Original language	English
Pages (from-to)	660-663
Number of pages	4
Journal	Journal of the Ceramic Society of Japan
Volume	105
Issue number	8
DOIs	https://doi.org/10.2109/jcersj.105.660
Publication status	Published - 1997 Aug
Externally published	Yes

Keywords

C-S-H gel
CaCO
Calcination
Flexural strength
Hydrothermal solidification

ASJC Scopus subject areas

Ceramics and Composites
Chemistry(all)
Condensed Matter Physics
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.2109/jcersj.105.660

Cite this

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abstract = "The possibility of the solidification of CaCO3 with saving energy consumption was discussed in the system CaCO3-CaO-SiO2 (88.2 :1.8 : 10.0 mass%). Two kinds of bodies - {"}calcination system{"} where CaO was supplied from partially calcined CaCO3 at 800°C for 3h and {"}addition system{"} where CaO was added - were prepared and hydrothermally processed under the saturated vapor pressure at 150-200°C for 2-10h. In the calcination system, flexural strength of the body cured at 150°C for 10h or at 200°C for 5h showed 9 MPa which was three times higher than that in the addition system. The strength was controlled by the formed fibrous or lath-like C-S-H gels and C-S-H gels in the calcination system gave larger volume and more uniform distribution than in the addition system. Some parts of C-S-H gels were formed from CaCO3 and 13% of CaCO3 was observed to react in the calcination system at 150°C for 10h or at 200°C for 5h curing.",

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author = "Makoto Kotama and Takeyuki Yamamoto and Osamu Watanabe and Hideki Ishida",

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AU - Kotama, Makoto

AU - Yamamoto, Takeyuki

AU - Watanabe, Osamu

AU - Ishida, Hideki

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N2 - The possibility of the solidification of CaCO3 with saving energy consumption was discussed in the system CaCO3-CaO-SiO2 (88.2 :1.8 : 10.0 mass%). Two kinds of bodies - "calcination system" where CaO was supplied from partially calcined CaCO3 at 800°C for 3h and "addition system" where CaO was added - were prepared and hydrothermally processed under the saturated vapor pressure at 150-200°C for 2-10h. In the calcination system, flexural strength of the body cured at 150°C for 10h or at 200°C for 5h showed 9 MPa which was three times higher than that in the addition system. The strength was controlled by the formed fibrous or lath-like C-S-H gels and C-S-H gels in the calcination system gave larger volume and more uniform distribution than in the addition system. Some parts of C-S-H gels were formed from CaCO3 and 13% of CaCO3 was observed to react in the calcination system at 150°C for 10h or at 200°C for 5h curing.

AB - The possibility of the solidification of CaCO3 with saving energy consumption was discussed in the system CaCO3-CaO-SiO2 (88.2 :1.8 : 10.0 mass%). Two kinds of bodies - "calcination system" where CaO was supplied from partially calcined CaCO3 at 800°C for 3h and "addition system" where CaO was added - were prepared and hydrothermally processed under the saturated vapor pressure at 150-200°C for 2-10h. In the calcination system, flexural strength of the body cured at 150°C for 10h or at 200°C for 5h showed 9 MPa which was three times higher than that in the addition system. The strength was controlled by the formed fibrous or lath-like C-S-H gels and C-S-H gels in the calcination system gave larger volume and more uniform distribution than in the addition system. Some parts of C-S-H gels were formed from CaCO3 and 13% of CaCO3 was observed to react in the calcination system at 150°C for 10h or at 200°C for 5h curing.

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KW - Flexural strength

KW - Hydrothermal solidification

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