CAREER: Sustainable Material Harvesting in Civil Engineering: A Building Lifecycle Approach to Maximize Recyclable and Reusable Demolition Waste

这个职业项目的研究目标是调查不同利益相关者在建筑生命周期中做出的决定对材料使用、再利用和回收的影响，并开发一种整体方法，以在拆除阶段最大限度地提高可回收和可重复使用的材料产量。许多研究人员强调了在建筑整个生命周期中优化材料使用的重要性，但大多数方法主要集中在早期阶段(即设计和施工)。这是因为对所有相关利益相关者(即建筑物业主、拆迁承包商和政府机构)在建筑物使用寿命期间做出的集体决策的影响了解有限，而且缺乏一种方法来整合他们的独立行动，以实现下游的可持续性。该项目解决了这一知识鸿沟。具体的研究活动包括：(I)通过将回收的拆迁物质利益纳入建筑物业主的维护、维修和修复(MR&amp；R)决策过程中，促进对利益相关者决策过程的了解；(Ii)量化不同拆迁方案的生产力；以及(Iii)评估它们在不同环境政策执行情景下对回收和再利用的影响。该项目以社区一级(即佛罗里达州塔拉哈西)为重点，将为可持续的拆迁材料收获制定一种综合规划方法。教育目标是向学生和公众灌输一种积极的态度，将拆卸废物视为具有未开发潜力的可回收材料，并教育下一代工程师采用可持续发展的做法。教育活动包括：(I)为本科和研究生教学编制关于回收建筑材料和可持续材料收获的教育单元，(Ii)让本科生和K-12学生参与可持续材料收集概念的小规模演示，以及(Iii)通过与学生分会合作，宣传回收/再利用建筑材料和可持续做法的好处。教育活动旨在通过与学生和公众的互动来改善人们对拆迁废物的负面看法。该项目将创建一种可持续拆卸材料收集的整体方法，不仅改进了特定阶段的可持续发展方法，还使整合能够在建筑的整个生命周期中最大限度地实现下游可持续发展。对于建筑物的使用和使用阶段，该项目将开发一个新的随机模型，以评估在建筑物的使用寿命内所做的MR&Amp；R决策对回收的碳节约潜力的贡献，并使建筑物所有者的决策朝着可持续发展方向优化。该项目将量化不同管理和操作条件下拆除方法的时间性能。此外，该项目还将制定一个政策规划框架，以最大限度地提高回收拆迁材料的产量，从而使决策过程相互关联和推动。将对开发的综合材料收获规划工具进行修改，使之成为研究生易于理解的学习媒介，以解决区域材料问题(例如，飓风过后重建对材料的高需求)，从而促进当地环境的可持续性。研究和教育成果将通过PI与自然灾害和建筑工程研究社区的联系在全国范围内传播。少数族裔学生和K-12学生将通过FAMU-FSU工程学院与少数族裔服务机构的独特合作伙伴关系和FSU现有的课程从事研究和教育。作为该项目的一部分，将建立一个新的工程与艺术合作，以改善学生和公众对拆迁浪费的看法。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The research objectives of this CAREER project are to investigate impacts of decisions made by various stakeholders across a building’s lifecycle on material use, reuse, and recycle, and to develop a holistic approach to maximize recyclable and reusable material yields during the demolition phase. Many investigators have emphasized the importance of optimizing the use of materials throughout a building’s lifecycle, but most approaches have primarily focused on early stages (i.e., design and construction). This is because there is only a limited understanding of the impacts of collective decisions made by all relevant stakeholders (i.e., building owners, demolition contractors, and government agencies) across a building’s service life and the lack of a method to integrate their independent actions toward achieving downstream sustainability. This project addresses this knowledge gap. Specific research activities include advancing understanding of the decision-making process of stakeholders, (i) through the incorporation of recovered demolition material benefits within building owners’ maintenance, repair, and rehabilitation (MR&R) decision-making process, (ii) the quantification of productivity of different demolition options, and (iii) evaluating their impacts on recycling and reuse under different scenarios of environmental policy implementation. Focusing at a community level (i.e., in Tallahassee, Florida), this project will develop an integrated planning method for sustainable demolition material harvesting. The educational objectives are to instill in students and as much as possible in the general public a positive attitude about demolition waste as recoverable materials with untapped potential, and to educate the next generation of engineers to adopt sustainable practices. Educational activities include (i) developing educational modules on recycled construction materials and sustainable material harvesting for undergraduate and graduate teaching, (ii) engaging undergraduate and K-12 students in small-scale demonstration of the sustainable material harvesting concept, and (iii) promoting the benefits of recycled/reused construction materials and sustainable practices by working with student chapters. The educational activities are designed to improve the negative perception of demolition waste through interaction with students and the public.This project will create a holistic approach to sustainable demolition material harvesting, which not only advances phase-specific sustainability methods but also enables integration to maximize downstream sustainability across a building’s lifecycle. For the building use & occupation phase, this project will develop a new stochastic model to evaluate MR&R decisions made over a building's service life with respect to their contribution to the carbon- saving potential of recycling, and enable optimization of building owners’ decision-making toward sustainability. The project will quantify the time-performance of demolition methods under various management and operational conditions. Additionally, the project will develop a policy- planning framework, which enables interrelating and driving decision-making processes in a way that maximizes demolition material yields for recovery. The integrated material harvesting planning tool developed will be modified for use as an easy-to-comprehend learning medium by graduate students to address regional material issues (e.g., high material needs for rebuilding after a hurricane), thereby contributing to local environmental sustainability. Research and education outcomes will be disseminated nationally through the PI’s connection with natural hazards and construction engineering research communities. Minority and K-12 students will be engaged in research and education through FAMU-FSU College of Engineering's unique partnership with a minority-serving institution and FSU's existing programs. As part of the project, a new engineering-art collaboration will be created to improve students’ and the public’s perception of demolition waste.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.