Utilization of wasted carbon dioxide to cement lining method

Research Project

Project/Area Number	06838009
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	時限
Research Field	都市施設保全工学
Research Institution	Hiroshima Institute of Technology
Principal Investigator	SUZUKI Takeo Hiroshima Institute of technology professor, 工学部, 教授 (40087953)
Project Period (FY)	1994 – 1996
Project Status	Completed (Fiscal Year 1996)
Budget Amount *help	¥2,100,000 (Direct Cost: ¥2,100,000) Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000) Fiscal Year 1995: ¥900,000 (Direct Cost: ¥900,000) Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Keywords	Cement lining method / Carbon dioxide / Early strength / unconfined compressive strength / tunnel / セメント吹付け工法 / セメント / 吹付け工法 / モルタル / セメントペースト / 短期強度発現 / 温度上昇 / 吹付け装置
Research Abstract	In the lavolatory experiments, utilization of carbon dioxide to cement lining was studied to get early strength by the hydration of cement. In the change of cement lining condition, kinds of cement ; ordinary portland cement, high early portland cement, moderate portland cement, portland blast-furnace slag cement, water cement ratio : 27-60%, carbon dioxide concentration in the air ; 0-10%, the temperature of mixing water ; 10ﾟC-20ﾟC,curing time : 1hour-7days, the test pieces are made and tested by the unconfined compressive strength. Good test results were obtained at 40%-60% carbon dioxide concentration for each cements. By this research, that were found utilization of carbon dioxide to cement were very effective.