Chapter
Apr 26, 2012
Prediction Method for Ca Leaching and Related Property Change of Cement Treated Soil
Authors: Takahiro Nishida, Masaaki Terashi, Dr.Eng., Nobuaki Otsuki, and Kanta OhishiAuthor Affiliations
Publication: Grouting and Ground Treatment
Abstract
Deep mixing method has been applied to improve soft ground for over 25 years in Japan. However, the possibility of deterioration of treated soils has not been studied in detail. In this paper, long-term strength change of treated soil was investigated. The paper consists of three parts. In the first part, the strength characteristic of in-situ treated soil after 17 years is investigated. In the second part, Ca (calcium) leaching phenomenon from treated soil to surrounding soil is investigated in situ. And in the third part, the numerical prediction method for Ca leaching from treated soil is proposed. It is confirmed that after 17 years the treated soil has sufficient strength characteristics, although it is slightly influenced by Ca leaching. The related property change to Ca leaching from treated soil can be expressed using numerical analysis considering ion migration model and Ca leaching model.
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© 2003 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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ASCE Technical Topics:
- Chemical processes
- Chemistry
- Engineering fundamentals
- Engineering materials (by type)
- Environmental engineering
- Field tests
- Foundation construction
- Foundations
- Geomechanics
- Geotechnical engineering
- Leaching
- Materials engineering
- Pollution
- Soft soils
- Soil cement
- Soil mechanics
- Soil mixing
- Soil pollution
- Soil properties
- Soil strength
- Soil treatment
- Soils (by type)
- Tests (by type)
Authors
Affiliations
Takahiro Nishida
Research Associate, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, 152-8552 Tokyo, Japan
Masaaki Terashi, Dr.Eng.
M.ASCE
Director, Nikken Sekkei Nakase Geotechnical Institute, 4-11-1 Minamikase, Saiwai-ku, Kawasaki, 212-0055 Japan
Nobuaki Otsuki
M.ASCE
Professor, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8552 Japan
Kanta Ohishi
Research Engineer, Nikken Sekkei Nakase Geotechnical Institute, 4-11-1 Minamikase, Saiwai-ku, Kawasaki, 212-0055 Japan
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