Cementation Stress Characteristic Curve for Sands Treated by Microbially Induced Carbonate Precipitation
文献类型：期刊论文
| 作者 | Lin, Hai2; Dong, Yi3; Park, Joon Soo2; Montoya, Brina M.1 |
| 刊名 | JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 149期号:12页码:17 |
| 关键词 | Cementation stress Cementation stress characteristic curve Effective stress Microbially induced carbonate precipitation (MICP) Cemented sand Biomediated soil improvement |
| ISSN号 | 1090-0241 |
| DOI | 10.1061/JGGEFK.GTENG-11403 |
| 英文摘要 | Microbially induced carbonate precipitation (MICP) has been widely studied as an innovative method for ground improvement applications by taking advantage of the cementation effect of the porous geomaterial and thus enhancing its stiffness and strength. Yet, a quantitative and precise description of the interparticle stresses induced by CaCO3 cementation, and the effective stress of MICP-treated sands remain elusive and obscure. Note that bonding among particles induced by the calcium carbonate bridging is ubiquitous in a more general term of cementing granular materials commonly seen by capillary water, ice or gas hydrates, polymers, etc. In this work, the concept of cementation stress for MICP-treated sands was proposed, which was found to be equal to the isotropic tensile strength of MICP-treated sands, to unify the effective stress in uncemented and MICP-treated sands. The cementation stress characteristic curve can be defined as the relationship between the cementation stress and CaCO3 content to describe how CaCO3 cementation develops for sands as CaCO3 precipitates. Cementation stress characteristic curves were used to predict the shear strength of MICP-treated sands at different CaCO3 contents and the contour of shear strength distribution of a MICP-treated sand box, which compared favorably with the measured shear strengths from triaxial, direct shear, and unconfined compression tests. The validity of the cementation stress characteristic curve was confirmed for several sands and test conditions, considering factors of CaCO3 contents (up to 25%), poorly graded sands with particle size ranging from 0.1 to 2 mm, confining pressure (up to 400 kPa), and concentrations of urea and calcium chloride between 50 mM and 1 M. The cementation stress characteristic curve provides a potentially simple and practical way to describe the state of stress in MICP-treated sands and contributes a unified method to quantify the CaCO3 cementation effects and predict the shear strength of MICP-treated sands. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001256363500004 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41825]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Lin, Hai |
| 作者单位 | 1.North Carolina State Univ, Dept Civil Construct & Environm Engn, 915 Partners Way, Raleigh, NC 27695 USA 2.Louisiana State Univ, Dept Civil & Environm Engn, 3255 Patrick F Taylor Hall, Baton Rouge, LA 70803 USA 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Hai,Dong, Yi,Park, Joon Soo,et al. Cementation Stress Characteristic Curve for Sands Treated by Microbially Induced Carbonate Precipitation[J]. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING,2023,149(12):17. |
| APA | Lin, Hai,Dong, Yi,Park, Joon Soo,&Montoya, Brina M..(2023).Cementation Stress Characteristic Curve for Sands Treated by Microbially Induced Carbonate Precipitation.JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING,149(12),17. |
| MLA | Lin, Hai,et al."Cementation Stress Characteristic Curve for Sands Treated by Microbially Induced Carbonate Precipitation".JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING 149.12(2023):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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