The Application of Flyash Cement in Mining Backfill Material

Hideki Shimada, Takashi Sasaoka, S. Kubota, K. Matsui, Y. Yoshida

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

10 被引用数 (Scopus)

抄録

A large amount of wastes from the preparation plant is produced. The properties of these wastes vary depending on the mineralogical contents of the mother rock in which the coal is embedded. The waste quality depends on the method of mining and cleaning. The waste mainly consists of clays, quartz, carbonaceous materials, mica, pyrites and so on About 55 per cent of coal-ash is now utilised and the remains are disposed of at the disposal sites, however, the life of the disposal site is limited. Moreover, it is difficult to find new disposal sites. Therefore, it is requested that the percentage of the utilisation of the coal-ash be increased in every field in Japan. So, it is very much available if the injection material for natural/artificial openings can be applied on the cement that is added to flyash. Among the man-made pozzolans, a flyash is probably the most successful component used in grout injection. When flyash is added to Portland cement concrete, the same kinds of oxides as those of the cement are being added. As an injection component, flyash acts, in part, as a fine aggregate and, in part, as a binding component. However, there is not a substantial alteration of the properties of the original component. From these points of view, in order to clarify to what degree the flyash content affects the properties of the injected grout mixture; different combinations of flyash, Portland cement and water were considered by means of several experiments.

本文言語英語
ホスト出版物のタイトル12th International Symposium on Mine Planning and Equipment Selection
ページ199-204
ページ数6
1
出版ステータス出版済み - 2003
イベントTwelfth International Symposium on Mine Planning and Equipment Selection - Kalgoorlie, WA, オーストラリア
継続期間: 4 23 20034 25 2003

その他

その他Twelfth International Symposium on Mine Planning and Equipment Selection
国/地域オーストラリア
CityKalgoorlie, WA
Period4/23/034/25/03

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)

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