金属离子种类对珊瑚砂微生物固化影响研究
发布时间：2019-01-19 10:10
【摘要】：选用巴斯德芽孢杆菌,对微生物诱导钙离子、镁离子以及铁离子形成碳酸盐固化松散珊瑚砂颗粒的效果进行对比研究。试验结果表明,在相同试验方法、相同注入次数的条件下,微生物诱导形成的碳酸钙和碳酸镁能将珊瑚砂松散颗粒固化成为整体,加入铁离子的试样因为反应过程的原因没有成功。通过渗透性、干密度变化、无侧限抗压强度及微观结构等方面进行对比分析,钙离子试样相对于镁离子试样,具有固化过程平稳、干密度增量大、强度高、微观颗粒包裹更好的优点。综合试验结果得出,钙离子是现阶段微生物固化珊瑚砂较为理想的金属离子。本试验首次探讨了金属离子种类对珊瑚砂微生物固化效果的影响,为微生物固化技术提供了一定理论基础,对该技术的进一步应用具有一定借鉴意义。
[Abstract]:The effects of calcium, magnesium and iron ions induced by microbes on the formation of carbonate solidified loose coral sand particles were studied by using Pasteurella spp. The results showed that under the same test method and the same injection times, calcium carbonate and magnesium carbonate induced by microorganisms could solidify the loose particles of coral sand into a whole. The sample with iron ion did not succeed because of the reaction process. Through the comparative analysis of permeability, dry density change, unconfined compressive strength and microstructure, the calcium ion sample has steady curing process, large dry density increment and high strength compared with magnesium ion sample. Microparticles encapsulate better advantages. The results show that calcium ion is an ideal metal ion for microorganism solidified coral sand at present. The effect of metal ions on the microbial solidification effect of coral sand is discussed for the first time, which provides a theoretical basis for the microbial solidification technology, and has a certain reference value for the further application of this technology.
【作者单位】： 中国人民解放军后勤工程学院土木工程系;重庆科技学院建筑工程学院;
【基金】：国家自然科学基金项目(51479208,11272354) 总后勤部基建营房部资助项目(CY114C022)~~
【分类号】：P75
本文编号：2411270
[Abstract]:The effects of calcium, magnesium and iron ions induced by microbes on the formation of carbonate solidified loose coral sand particles were studied by using Pasteurella spp. The results showed that under the same test method and the same injection times, calcium carbonate and magnesium carbonate induced by microorganisms could solidify the loose particles of coral sand into a whole. The sample with iron ion did not succeed because of the reaction process. Through the comparative analysis of permeability, dry density change, unconfined compressive strength and microstructure, the calcium ion sample has steady curing process, large dry density increment and high strength compared with magnesium ion sample. Microparticles encapsulate better advantages. The results show that calcium ion is an ideal metal ion for microorganism solidified coral sand at present. The effect of metal ions on the microbial solidification effect of coral sand is discussed for the first time, which provides a theoretical basis for the microbial solidification technology, and has a certain reference value for the further application of this technology.
【作者单位】： 中国人民解放军后勤工程学院土木工程系;重庆科技学院建筑工程学院;
【基金】：国家自然科学基金项目(51479208,11272354) 总后勤部基建营房部资助项目(CY114C022)~~
【分类号】：P75
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