PFI: AIR - TT: Developing A Bio-based Rejuvenator to Revitalize Asphalt in Scrap Roofing Shingles

这个PFI: AIR技术翻译项目的重点是翻译生物改性再生沥青的科学，以填补对萎缩的石油基胶粘剂的替代和补充供应的需求。生物改性再生沥青瓦（BRAS）是重要的，因为它使废弃瓦的使用，否则将被处置在垃圾填埋场，升级为沥青粘合剂的补充产品。这项技术意义重大，因为自从炼油厂采用焦化技术以来，沥青供应正在迅速减少。因此，该PFI项目将为路面施工中使用的BRAS提供概念验证。新开发的产品BRAS具有低成本、耐用和环保的特点，可以提高路面的使用寿命，同时降低路面建设成本和碳足迹。此外，BRAS的生产使用来自两种废物流（废瓦和动物废物）的产品，这也提供了一种具有成本效益的废物管理解决方案。因此，与建筑行业现有产品相比，BRAS在节约成本、延长耐用性、环境影响和节能方面具有优势。该项目解决了以下技术差距，因为它从研究发现转化为商业应用。在废瓦中发现的沥青粘合剂由于多年的使用而被高度氧化。氧化通常通过转化马氏烯部分和增加沥青烯聚集来扰乱沥青结构的胶体稳定性。因此，这个PFI项目正在使用从动物粪便中提取的特定分子物种来恢复沥青的稳定性并增强其性能。多尺度建模和表征，随后进行实验和原型设计，将用于开发具有与原始沥青粘合剂相似性能的BRAS。该项目将涉及具有机械、化学和材料科学专业知识的研究学者和学生来进行这项研究。参与该项目的学生和学者将接受创业培训，同时与客户面谈，并与潜在的行业合作伙伴会面，以促进技术推广。

This PFI: AIR Technology Translation project focuses on translating the science of bio-modified recycled asphalt to fill the need for substitute and supplementary supply for shrinking petroleum-based adhesives. The Bio-modified Recycled Asphalt Shingle (BRAS) is important because it enables the use of scrap shingles, which are otherwise being disposed of in landfills, to be upgraded for use as a supplementary product to asphalt binder. This technology is significant because asphalt supplies are diminishing rapidly since the advent and adaptation of coking technologies by refineries. Accordingly, this PFI project will result in a proof-of-concept for BRAS for use in pavement construction. The newly developed product, BRAS, is low-cost, durable and environmentally friendly, features that improve pavement service life while reducing pavement construction cost and carbon footprint. In addition, the production of BRAS uses products from two waste streams (scrap shingles and animal waste), which also provides a cost-effective waste management solution. Thus, BRAS is superior in terms of cost savings, extended durability, environmental impact and energy savings when compared to the existing products in the construction industry.This project addresses the following technology gaps as it translates from research discovery toward commercial application. The supply of asphalt binder found in scrap shingles are highly oxidized from years of prior service. Oxidation typically disturbs colloidal stability of asphalt structure by converting maltene portions and increasing asphaltene aggregation. Accordingly, this PFI project is using specific molecular species extracted from animal waste to restore asphalt stability and enhance its properties. A multi-scale modeling and characterization followed by experiments and prototyping will be used to develop BRAS with properties similar to that of virgin asphalt binder. The project will involve research scholars and students with mechanical, chemical and material science expertise to undertake this research. Students and scholars involved in the project will receive entrepreneurship training while conducting customer interviews and meetings with potential industry partners to facilitate technology scale-up.