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

该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，以满足对收缩石油基粘合剂的替代和补充供应的需求。生物改性沥青瓦（布拉斯）是重要的，因为它使使用废瓦，否则被处置在垃圾填埋场，升级作为补充产品，以沥青粘合剂。这项技术意义重大，因为自从炼油厂采用焦化技术以来，沥青供应迅速减少。因此，该PFI项目将导致布拉斯用于路面施工的概念验证。新开发的布拉斯产品成本低、耐用、环保，可提高路面使用寿命，同时降低路面建设成本和碳足迹。此外，布拉斯的生产使用来自两种废物流的产品（废木瓦和动物废物），这也提供了一种具有成本效益的废物管理解决方案。因此，与建筑行业现有的产品相比，布拉斯在节约成本、延长耐久性、环境影响和节能方面具有上级优势。该项目解决了从研究发现到商业应用的以下技术差距。在废瓦中发现的沥青粘合剂的供应由于多年的先前服务而高度氧化。氧化通常通过转化软质部分和增加沥青质聚集来扰乱沥青结构的胶体稳定性。因此，该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稳定性并增强其性能。一个多尺度的建模和表征，然后实验和原型将被用来开发布拉斯的性质类似的原生沥青结合料。 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，同时与潜在的行业合作伙伴进行客户访谈和会议，以促进技术规模的扩大。

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.