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フルテキストURLKJ00004351115.pdf ( 545.0KB ) 公開日 2010-04-19
タイトルCementitious materials of pozzolanic type prepared from red mud and fly ash with gypsum and portlandite as activators
作成者Ikida, Ko
作成者ヨミイケダ, コウ
作成者別表記池田, 攻
作成者所属山口大学工学部
内容記述(抄録等)Bauxite from Australia contains boehmite which remains intact in the red mud after extraction of alumina. Therefore, this kind of red mud can be used as cementitious mateirals without clinkering process. Gypsum and/or portlandite were added to the red mud as activators. Two series of mixtures were prepared to produce ettringite and/or C_4AH_<13>. These cementitious mixtures called the red mud mixes are hydraulic themselves. Howevr, they are no use as cementitious materials due to the unstable hydration strength. To improve this defect fly ash was introduced to the red mud mixes together with 7 percent extra addition of portlandite to the fly ash. Thus, cementitious materials of pozzolanic type with moderately high strength have been obtained by water curing, resulting compressive strength up to 9.7, 16.4 and 20.1 MPa at 7, 28 and 91-day ages, respectively. Depressions of strength encountered in some specimens especially in air curing have been improved by blending fly ash and more activators. The depressions are closely related to the disintegrations of ettringite, C_4AH_<13> and/or C_4AHCH_<12>.
本文言語eng
主題工学
資料タイプtext
ファイル形式application/pdf
出版者山口大学工学部
出版者ヨミヤマグチ ダイガク コウガクブ
NII資料タイプ紀要論文
ISSN0386-3433
NCIDAA0086073X
学内刊行物(紀要等)Technology reports of the Yamaguchi University
掲載誌名Technology reports of the Yamaguchi University
4
3
開始ページ195
終了ページ205
発行日1989-12
著者版/出版社版出版社版
備考本文データは国立情報学研究所において電子化したものである
リポジトリIDKJ00004351115
地域区分山口大学
URIhttp://www.lib.yamaguchi-u.ac.jp/yunoca/handle/KJ00004351115