STRENGTHENING OF HYDROTHERMAL HOT-PRESSED CONCRETE WASTES BY THE ADDITION OF FRESH CEMENT

Citation
Y. Nakane et al., STRENGTHENING OF HYDROTHERMAL HOT-PRESSED CONCRETE WASTES BY THE ADDITION OF FRESH CEMENT, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 103(5), 1995, pp. 511-514
Citations number
1
Language
GIAPPONESE
art.tipo
Article
Categorie Soggetti
Material Science, Ceramics
ISSN journal
0914-5400
Volume
103
Issue
5
Year of publication
1995
Pages
511 - 514
Database
ISI
SICI code
0914-5400(1995)103:5<511:SOHHCW>2.0.ZU;2-T
Abstract
In order to recycle concrete wastes, a new processing method for solid ifying pulverized concrete wastes has been developed using a hydrother mal hot-pressing method. The effect of addition of fresh cement was ex amined to further increase the strength of solidified concrete wastes, Hydrothermal hot-pressing tests were carried out at 200-250 degrees C with the water content of 10-30 mass% under the pressure of 20 MPa fo r 20 min. Fresh cement of 0-50 mass% was added to the mixture. It is s hown that the formation of tobermorite improved the tensile strength. The tensile strength determined by a Brazilian test reached approximat ely 13 MPa under the conditions; the temperature:230 degrees C, fresh cement content :50 mass%, and water content:30 mass%.