Recycle of inorganic wastes by hydrothermal technology

Mikihiro Oida; Hiroki Maenami; Norifumi Isu; Hideki Ishida

doi:10.1109/ECODIM.2005.1619231

Recycle of inorganic wastes by hydrothermal technology

Mikihiro Oida, Hiroki Maenami, Norifumi Isu, Hideki Ishida

Environmental Studies

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In order to build up a sustainable society, the authors have investigated the recycling technology of inorganic wastes with low energy consumption. Sewage sludge ash, concrete waste, and construction sludge were used as raw materials. These waste were mixed with Ca(OH)₂ and formed by uniaxial pressing. The specimens were autoclaved for 6 h at 180°C under saturated steam pressure. The flexural strength of the specimens varied from 3.2 to 9.4 MPa with the bulk density of 1200 to 1550 kg/m³. The strength development was caused by filling of the initial void among the particles with tobermorite (Ca₅(Si₆O₁₈H₂)·4H ₂O) and hydrogarnet (Ca₃Al₂(SiO ₄)(OH)₈) formed by hydrothermal treatment. To apply these solidified inorganic waste to paving tile, we determined that Ca(OH) ₂/wastes mass ratio is 15/85 for plant production condition. The paving tile had comparable performance with brick, block and concrete pavement.

Original language	English
Title of host publication	Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005
Pages	304-305
Number of pages	2
DOIs	https://doi.org/10.1109/ECODIM.2005.1619231
Publication status	Published - 2005 Dec 1
Event	4th International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005 - Tokyo, Japan Duration: 2005 Dec 12 → 2005 Dec 14

Publication series

Name	Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005
Volume	2005

Other

Other	4th International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005
Country/Territory	Japan
City	Tokyo
Period	05/12/12 → 05/12/14

Keywords

Flexural strength
Heavy metal fixation
Hydrothermal treatment
Paving tile
Waste

ASJC Scopus subject areas

Engineering(all)

UN SDGs

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

Access to Document

10.1109/ECODIM.2005.1619231

Cite this

Oida, M., Maenami, H., Isu, N., & Ishida, H. (2005). Recycle of inorganic wastes by hydrothermal technology. In Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005 (pp. 304-305). [1619231] (Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005; Vol. 2005). https://doi.org/10.1109/ECODIM.2005.1619231

Recycle of inorganic wastes by hydrothermal technology. / Oida, Mikihiro; Maenami, Hiroki; Isu, Norifumi; Ishida, Hideki.

Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005. 2005. p. 304-305 1619231 (Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005; Vol. 2005).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Oida, M, Maenami, H, Isu, N & Ishida, H 2005, Recycle of inorganic wastes by hydrothermal technology. in Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005., 1619231, Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005, vol. 2005, pp. 304-305, 4th International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005, Tokyo, Japan, 05/12/12. https://doi.org/10.1109/ECODIM.2005.1619231

Oida M, Maenami H, Isu N, Ishida H. Recycle of inorganic wastes by hydrothermal technology. In Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005. 2005. p. 304-305. 1619231. (Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005). https://doi.org/10.1109/ECODIM.2005.1619231

Oida, Mikihiro ; Maenami, Hiroki ; Isu, Norifumi ; Ishida, Hideki. / Recycle of inorganic wastes by hydrothermal technology. Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005. 2005. pp. 304-305 (Proceedings - Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing, Eco Design 2005).

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AB - In order to build up a sustainable society, the authors have investigated the recycling technology of inorganic wastes with low energy consumption. Sewage sludge ash, concrete waste, and construction sludge were used as raw materials. These waste were mixed with Ca(OH)2 and formed by uniaxial pressing. The specimens were autoclaved for 6 h at 180°C under saturated steam pressure. The flexural strength of the specimens varied from 3.2 to 9.4 MPa with the bulk density of 1200 to 1550 kg/m3. The strength development was caused by filling of the initial void among the particles with tobermorite (Ca5(Si6O18H2)·4H 2O) and hydrogarnet (Ca3Al2(SiO 4)(OH)8) formed by hydrothermal treatment. To apply these solidified inorganic waste to paving tile, we determined that Ca(OH) 2/wastes mass ratio is 15/85 for plant production condition. The paving tile had comparable performance with brick, block and concrete pavement.

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Recycle of inorganic wastes by hydrothermal technology

Abstract

Publication series

Other

Keywords

ASJC Scopus subject areas

UN SDGs

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