CAREER: Mollusk and Arthropod-inspired Bio-Cemented Composites for Sustainable, Resilient, and Multifunctional Ground Improvement

职业：受软体动物和节肢动物启发的生物水泥复合材料，用于可持续、有弹性和多功能的地面改良

• 批准号: 2045058
• 负责人: Michael Gomez
• 金额: $ 50万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-07-01 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2045058&HistoricalAwards=false
• 关键词: CAREER; Mollusk; Arthropod; inspired; Bio

This Faculty Early Career Development (CAREER) award will explore the potential for incorporating bio-inspired principles from natural composites found in mollusks and arthropods with existing bio-cementation soil improvement to yield multifunctional, resilient, and sustainable bio-cemented composites for the improvement of weak and problematic soils. While bio-cementation has been shown to dramatically improve soil engineering behaviors, the presence of cementation can also result in some potentially unfavorable responses including rapid strength and stiffness losses. This project will draw inspiration from the structure and mechanisms associated with mechanically superior biogenic composites to modify existing bio-cementation and further enhance soil engineering behaviors to provide transformative benefits with respect to the environmental sustainability, economic efficacy, long-term resilience, and multifunctionality of geotechnical soil improvement and reliant civil infrastructure. Project education and outreach activities will address critical deficiencies in the pipeline of underrepresented minority students towards STEM-based higher education by: (1) increasing the awareness of underrepresented minority students of STEM fields, higher education, and careers through outreach at various venues including the Seattle Aquarium, (2) improving the recruitment of underrepresented minority students to STEM-based higher education through modules, mobile outreach toolkits, an academy for K-12 teachers, and implementation of content in classrooms, and (3) enhancing underrepresented minority student retention in STEM through research experiences, integration with support programs, and incorporation of project outcomes in curricula. Over 600 K-12 and community college students will be engaged annually from remote and diverse student populations. Project research will leverage small-scale biogeochemical experiments, reactive transport numerical modeling, triaxial and resonant column geotechnical laboratory tests, and advanced chemical, biological, and material analyses to: (1) explore the potential of bio-inspired principles to be translated to bio-cemented soils to achieve bio-cemented composites with enhanced fracture toughness, ductility, and strength, (2) investigate the engineering behaviors of bio-cemented composite treated soils including (a) pre-yielding, post-yielding, and critical state behaviors, (b) low-strain dynamic properties, and (c) liquefaction behaviors, (3) examine the ability of bio-cemented composites to provide new functionalities including contaminant removal and thermal and hydraulic enhancements, and (4) explore the resilience of bio-cemented composites to biogeochemical and mechanical stressors and the environmental and economic efficacy of composites relative to existing technologies. The project will advance the emerging field of bio-mediated soil improvement by leveraging novel bio-mediated processes and bio-inspired principles to develop new materials for geotechnical ground improvement that can improve the resiliency, sustainability, and multifunctionality of civil infrastructure.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该教师早期职业发展（职业）奖将探索从软体动物和节肢动物中发现的生物启发的原理，具有现有的生物渗透土壤改善，从而产生多功能，弹性和可持续的生物粘液材料，以改善弱土壤和有问题的土壤。虽然已经证明生物缩放可极大地改善土壤工程行为，但胶结的存在也会导致一些潜在的不利反应，包括快速强度和僵硬损失。该项目将从与机械上卓越的生物源复合材料相关的结构和机制中汲取灵感，以修改现有的生物缩减，并进一步增强土壤工程行为，以在环境可持续性，经济疗效，长期抵抗力以及岩土技术的改善和重大的民用基础设施的多功能性方面提供变革性的好处。项目教育和推广活动将解决少数群体学生对基于STEM的高等教育的关键缺陷，通过：（1）通过以下方式提高对STEM领域的代表性不足的少数群体，高等教育，高等教育和职业的认识，通过在包括西雅图水族馆的各种场所进行外展活动，包括在内K-12教师的学院，以及在课堂上实施内容，以及（3）通过研究经验，与支持计划的整合以及在课程中的项目成果结合来增强代表性不足的少数族裔学生的保留。超过600 K-12和社区大学生将每年从偏远和多样化的学生人群中参与。项目研究将利用小规模的生物地球化学实验，反应性传输数值建模，三轴和谐振柱岩土岩土实验室测试以及先进的化学，生物学和材料分析，以探索：（1）探索生物启发的原理的潜力，可将生物渗透的土壤融合到生物液的范围内，以增强生物渗透性，以增强填充的富有效率，并增强效率（增强效率），（研究生物污染复合处理的土壤的工程行为，包括（a）（a）预恢复，产生后和临界状态行为，（（b）低形式动态特性，以及（c）液化行为，（c）液化性，（3）检查生物渗入的综合能力，以提供新的功能，包括新的功能，包括挑剔的（4型）富含水力化的（4级）水力化的功能，并进行水力化的（均匀的水力化），并提供了水力化的（均匀的杂物）。生物污染的复合材料与生物地球化学和机械压力源以及复合材料相对于现有技术的环境和经济功效。 The project will advance the emerging field of bio-mediated soil improvement by leveraging novel bio-mediated processes and bio-inspired principles to develop new materials for geotechnical ground improvement that can improve the resiliency, sustainability, and multifunctionality of civil infrastructure.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review 标准。