Application of a Microbial Immobilization Technique in Remediation of Concrete Cracks

微生物固定化技术在混凝土裂缝修复中的应用

• 批准号: 9802127
• 负责人: Sookie Bang
• 金额: $ 21.3万
• 依托单位: South Dakota School of Mines and Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-07-15 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9802127&HistoricalAwards=false
• 关键词: Application; Microbial; Immobilization; Technique; Remediation

9802127 Bang A new approach has been directed in the research to overcome the difficulties in concrete remediation, focusing on several reinforcement properties of microbial remediation of cracks in concrete; high retention of filling materials containing microorganisms, reduction of permeability, and high bonding strength between crack filling and concrete which can sustain environmental changes. In detail, the research is to employ an immobilization technique for remediation of cracks in concrete, where microbial cells encapsulated in polymers induce calcium carbonate precipitation to fill up the gap and enhance the strength for selective cementation. Extensive kinetic studies in the immobolized cell system are planned to understand the relationship of calcite precipitation to the chemical bonding between filling materials and concrete. Results from the kinetic studies will then be scaled up using mathematical models and directly incorporated into field application.

9802127 Bang 提出了一种新的方法来克服混凝土修复中的困难，重点关注微生物修复混凝土裂缝的几种增强性能；含有微生物的填充材料的保留率高，渗透性降低，裂缝填充物与混凝土之间的结合强度高，可以承受环境变化。 具体来说，该研究是采用固定化技术来修复混凝土裂缝，其中封装在聚合物中的微生物细胞诱导碳酸钙沉淀以填充间隙并增强选择性胶结的强度。 计划对固定细胞系统进行广泛的动力学研究，以了解方解石沉淀与填充材料和混凝土之间的化学键合的关系。 然后，动力学研究的结果将使用数学模型进行放大，并直接纳入现场应用。