RESEARCH ON EFFECT OF MICROBES ON SOME ENGINEERING PROPERTIES OF SILT
-
摘要: 将微生物技术引入岩土改性中,筛选出多种碳酸盐矿化菌和多糖黏胶菌,利用碳酸盐矿化菌ATCC64533、和多糖黏胶菌5的代谢产物对粉土的工程性能进行改性,并对改性土体进行渗透和无侧限抗压强度试验,测定土体工程指标的变化。通过扫描电镜(ESEM)分析,研究不同微生物改性粉土的微观结构特征,揭示微生物改性粉土的机理。研究表明,掺碳酸盐矿化菌和多糖黏胶菌对粉土的渗透性和无侧限抗压强度均有不同程度的影响。Abstract: The microbiology is introduced in foundation treatment.Several carbonate-mineralization microbes and polysaccharides viscose microbes are screened and isolated, and microbes ATCC6453 , No.3 and No.5 are used in silt modification.Engineering properties of silt before and after modification are compared by unconfined compressive strength test and indoor seepage test.The microstructures of silt incorporating different microbes are analysed by mean of scanning electron microscope, the modification mechanism of silt is revealed. These studies indicate that certain engineering properties of silt can be improved by incorporating microbes.
-
Key words:
- silt /
- microbe /
- permeability coefficient /
- unconfined compressive strength /
- microstructure /
- modification mechanism
-
.Stocks-Fischer S, Galinat J K, Bang S S. Microbiological Precipitation of CaCO3[J]. Soil Biology and Biochemistry, 1999, 31: 1563-1571. [2] .Bang S S, Galinat J K, Ramakrishnan V. Calcite Precipitation Induced by Polyurethane-Immobilized Bacillus past eurii[J]. Enzyme and Microbial Technology, 2001, 28: 404 -409. [3] .Ramachandran S K , Ramakrishnan V, Bang S S.Remediation of Concrete Using Microorganisms [J]. American Concrete Institute Materials Journal, 2001, 98: 3-9. [4] .Bachmeier K L , Williams A E, Warmington J R, et al.Urease Activity in Microbiologically-Induced Calcite Precipitation[J]. Journal of Biotechnology, 2002, 93: 171-181. [5] .Lappin-Scott H M, Cusack F, Costerton. Nutrient Resuscitation and Growth of Starved Cells in Sandstone Cores :a N ovel Approach to Enhanced Oil Recovery[J]. Applied and Environmental Microbiology, 1988, 54: 1373-1382. [6] .Vemuri S L , Panchalan R K, Ramakrishnan V, et al.Plastic Shrinkage Crack Remediation Capacity of Bacterial Concrete-a Smart Biomaterial[C]//Proceedings of the ICFRC International Conference on Fibre Composites, High Performance Concretes and Smart Materials. Chennai, India: 2004: 1057-1067. [7] .周芳琴, 罗鸿禧, 王银善. 微生物对某些岩土工程性质的影响[J]. 岩土力学, 1997, 18(2): 17-22. [8] .胡春香, 刘永定, 张德禄, 等. 荒漠藻结皮的胶结机理[J]. 科学通报, 2002(12): 931-937. [9] .周东, 欧孝夺, 杜静, 等. 生物技术改良膨胀土探讨[J]. 广西大学学报(自然科学版), 2004, 29(3): 197-200. [10] .崔艳红, 黄现青. 微生物孢外多糖研究进展[J]. 生物技术通报, 2006(2): 25-28. [11] .王瑞兴, 钱春香, 王剑云. 微生物沉积碳酸钙研究[J].东南大学学报(自然科学版), 2005, 35(增刊I): 191-195. [12] .张莉. 微生物改性粉土的试验及机理研究[D]. 扬州: 扬州大学, 2008.
点击查看大图
计量
- 文章访问数: 103
- HTML全文浏览量: 5
- PDF下载量: 67
- 被引次数: 0