Application of material mixed with flyash and chemical additives on slurry pipe jacking

Hideki Shimada, Keisuke Takahashi, Kikuo Matsui, Shuichi Fujita, Takashi Kawai, Seiichi Mineshita, Tatsuya Mizunuma, Yasuhiro Yoshida, Iwao Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A large amount of waste is produced by coal-burning power stations. The properties of the waste varies, dependent 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 80% of coal-ash is now utilized and the remainder is disposed of at disposal sites. However, the life span of the disposal sites is limited, and it is difficult to find new disposal sites. It is therefore requested that the percentage of utilization of flyash be increased in every field in Japan. So, it is very desirable that cement with flyash added be used as the injection material for natural/artificial openings. From these points of view, in order to clarify to what degree the contents of chemical additives affect the properties of the injected flyash mixture in slurry pipe jacking, different combinations of flyash, additives and water were considered by means of several experiments.

Original languageEnglish
Title of host publicationInternational Society for Trenchless Technology - 23rd No-Dig International Conference and Exhibition, No-Dig 2005
Pages1-8
Number of pages8
Publication statusPublished - 2005
Event23rd No-Dig International Conference and Exhibition, No-Dig 2005 - Rotterdam, Netherlands
Duration: Sep 19 2005Sep 21 2005

Publication series

NameInternational Society for Trenchless Technology - 23rd No-Dig International Conference and Exhibition, No-Dig 2005

Other

Other23rd No-Dig International Conference and Exhibition, No-Dig 2005
CountryNetherlands
CityRotterdam
Period9/19/059/21/05

All Science Journal Classification (ASJC) codes

  • Geology
  • Geophysics
  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Mechanical Engineering
  • Building and Construction

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