Preparation and Characterization of Calcium Silicate/Vermiculite Composite

Masaru Akao; Yoshiaki Fukuda; Atsushi Yamazaki; Masahisa Inoue; Kojun Setsu; Tohru Takagi; Kan Rui; Miho Okauchi; Ryo Tamamura

doi:10.2485/jhtb.15.101

Original

Preparation and Characterization of Calcium Silicate/Vermiculite Composite

Masaru Akao, Yoshiaki Fukuda, Atsushi Yamazaki, Masahisa Inoue, Kojun Setsu, Tohru Takagi, Kan Rui, Miho Okauchi, Ryo Tamamura

Author information

Masaru Akao
Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University
Yoshiaki Fukuda
Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
Atsushi Yamazaki
Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University
Masahisa Inoue
Laboratory for Structure and Function Research, Faculty of Pharmaceutical Sciences, Tokushima Bunri University
Kojun Setsu
Laboratory for Structure and Function Research, Faculty of Pharmaceutical Sciences, Tokushima Bunri University
Tohru Takagi
Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama University
Kan Rui
Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama University
Miho Okauchi
Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama University
Ryo Tamamura
Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama University

Keywords: Calcium silicate, Vermiculite, Mechanical properties, Humidity control, Formaldehyde adsorption

JOURNAL FREE ACCESS

2006 Volume 15 Issue 3 Pages 101-104

DOI https://doi.org/10.2485/jhtb.15.101

Details

Abstract

A new calcium silicate/vermiculite composite for building material has been prepared from unfired vermiculite, calcium hydroxide, silica and pulp by autoclaving at 187°C at a pressure of 1.08 MPa. The product exhibited the vermiculite crystals dispersed uniformly in a definite direction among the matrix of calcium silicate. The composite showed marked plastic deformation caused by interlayer sliding of vermiculite. The building material was fixed by nails and screws and also possible to cut and saw like artificial wood. The board had superior humidity control originated from chemical adsorption of water molecules at the interlayer of vermiculite, and relative humidity in an experimental house was maintained to be 50%. Formaldehyde was chemically adsorbed to the composite, and there was no release of formaldehyde at elevated temperature.

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