CLIMA/Collaborative Research: Enhancing Soil-Based Infrastructure Resilience to Climate Change: Harnessing the Potential of Fractured Soil by Adding Biopolymers

CLIMA/合作研究：增强土壤基础设施对气候变化的抵御能力：通过添加生物聚合物来利用破碎土壤的潜力

• 批准号: 2332081
• 负责人: Marta Miletic
• 金额: $ 39.76万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-01 至 2026-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2332081&HistoricalAwards=false
• 关键词: CLIMA; Collaborative; Research; Enhancing; Soil

This CiviL Infrastructure research for climate change Mitigation and Adaptation (CLIMA) award supports research that will investigate a novel class of soil composites and their multi-physical coupled phenomenon to mitigate climate change effects on already fractured soil-based infrastructures by enhancing their durability and resilience. In the context of materials employed in soil-based infrastructure applications, traditional and calcium-based materials, as well as synthetic products, have led to greenhouse gas emissions, directly and indirectly contributing to global warming. Thus, there is a growing need for environmentally-friendly and efficient solutions to improve soil characteristics. Biopolymers have demonstrated their effectiveness in soil stabilization for intact natural soils. However, their potential impact on the coupled thermo-hydro-mechanical behavior of already fractured soil, and their role as a fracture stabilizer has been relatively unexplored. Through this collaborative CLIMA project, the researchers will investigate the potential of biopolymers as fracture stabilizers to enhance the strength and resilience of soil-based infrastructure, particularly concerning climate-induced soil fractures. The research outcomes will be integrated into various educational and outreach activities, engaging students at different academic levels (K-12, undergraduate, and graduate) and diverse backgrounds (women and individuals from underrepresented groups) to promote research on green soil-based infrastructure. Additionally, the project aims to foster multi-institutional collaboration across different classifications (R1 and R2) by developing teaching modules, lectures, and special panel discussions on this subject at conferences.The specific goal of the research is to comprehend the complex interplay between biopolymer, water content, and fracture orientation in fractured biopolymer-soil composites. To achieve this goal, this project will advance scientific knowledge by (1) fully integrating multi-scale multi-physics theoretical formulations, experimental data, and numerical models, (2) pioneering high-resolution 4D in-situ thermo-mechanical characterization methods for biopolymer fractured soil, (3) conducting state-of-the-art thermo-mechanical characterization at the microscale, (4) identifying and quantifying the effect of biopolymers on different water populations in various pore systems, and (5) carrying out the extensive macro-scale fully-coupled thermo-hydro-mechanical experimental program. The outcomes of this CLIMA project will provide a foundational technical roadmap for including biopolymers in soil-based infrastructure, promoting environmental and community-conscious choices, and generating positive societal impacts essential for building a climate-resilient future.This project is supported by the Engineering for Civil Infrastructure (ECI) Program and the Mechanics of Materials and Structures (MoMS) Program of the Division of Civil, Mechanical and Manufacturing Innovation (CMMI) of the Directorate for Engineering (ENG).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.

该气候变化减缓和适应民用基础设施研究 (CLIMA) 奖项支持研究新型土壤复合材料及其多物理耦合现象，通过提高其耐久性和弹性来减轻气候变化对已经破裂的土基基础设施的影响。就土壤基础设施应用中使用的材料而言，传统材料和钙基材料以及合成产品会导致温室气体排放，直接和间接导致全球变暖。因此，越来越需要环境友好且有效的解决方案来改善土壤特性。生物聚合物已证明其在稳定完整天然土壤方面的有效性。然而，它们对已裂隙土壤的热-水-机械耦合行为的潜在影响以及它们作为断裂稳定剂的作用尚未得到探索。通过这个 CLIMA 合作项目，研究人员将研究生物聚合物作为断裂稳定剂的潜力，以增强土壤基础设施的强度和弹性，特别是在气候引起的土壤断裂方面。研究成果将融入各种教育和推广活动，吸引不同学术水平（K-12、本科生和研究生）和不同背景（女性和来自弱势群体的个人）的学生参与，以促进绿色土壤基础设施的研究。此外，该项目旨在通过开发教学模块、讲座和会议上有关该主题的特别小组讨论，促进跨不同分类（R1 和 R2）的多机构合作。该研究的具体目标是理解生物聚合物之间复杂的相互作用、断裂生物聚合物-土壤复合材料中的含水量和断裂方向。为了实现这一目标，该项目将通过以下方式推进科学知识的发展：(1) 充分整合多尺度多物理理论公式、实验数据和数值模型，(2) 开创性的高分辨率 4D 原位热机械表征方法生物聚合物裂隙土，(3) 在微尺度上进行最先进的热机械表征，(4) 识别和量化生物聚合物对各种孔隙系统中不同水群体的影响，以及 (5)制定了广泛的宏观尺度全耦合热-水-机械实验计划。该 CLIMA 项目的成果将为将生物聚合物纳入土壤基础设施提供基础技术路线图，促进环境和社区意识的选择，并产生对建设气候适应型未来至关重要的积极社会影响。该项目得到了工程部的支持土木基础设施 (ECI) 计划和工程理事会 (ENG) 土木、机械和制造创新 (CMMI) 部门的材料和结构力学 (MoMS) 计划。该奖项反映了 NSF 的法定使命和通过使用基金会的智力价值和更广泛的影响审查标准进行评估，该项目被认为值得支持。