Experiment of self-healing function of sand cemented by calcium carbonate precipitation

• Project/Area Number: 22860073
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Geotechnical engineering
• Research Institution: Wakayama National College of Technology
• Principal Investigator: HAYASHI Kazuyuki 和歌山工業高等専門学校, 環境都市工学科, 准教授 (30587853)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥2,782,000 (Direct Cost: ¥2,140,000、Indirect Cost: ¥642,000); Fiscal Year 2011: ¥1,144,000 (Direct Cost: ¥880,000、Indirect Cost: ¥264,000); Fiscal Year 2010: ¥1,638,000 (Direct Cost: ¥1,260,000、Indirect Cost: ¥378,000)
• Keywords: 液状化 / カルサイト / 自己修復機能 / ウレアーゼ

Research Abstract

Self-healing function of sand cemented by calcium carbonate precipitation is presented. Cyclic undrained triaxial tests to clarify this function indicate that curing for a few days is not enough to recover of liquefaction resistance of destructed sand cemented by 1%. wt calcium carbonate, but increase in the amount of calcite precipitation gives self-healing function to sand.