A New Approach to Recycle Asphalt Shingles in Hot Mix Asphalt

热拌沥青中沥青瓦回收的新方法

• 批准号: 1030184
• 负责人: Mostafa Elseifi
• 金额: $ 16.4万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-10-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1030184&HistoricalAwards=false
• 关键词: New; Approach; Recycle; Asphalt; Shingles

The objective of this project is to test the hypothesis that roofing shingle scrap may be blended with asphalt binder through a wet process, in which the ground recycled material is blended with the binder at high temperature prior to mixing with the aggregates. Results of this research may revolutionize recycling practices of asphalt shingles in pavement construction by validating a new approach to incorporate discarded asphalt shingles into asphalt pavement construction. Current practices of dry blending Recycled Asphalt Shingles (RAS) with the aggregates before the asphalt binder is added to the batch are often criticized due to the large variability observed in the asphalt content of asphalt shingles. The proposed wet process may offer the potential to increase the percentage of asphalt shingles used in the mixture and may allow for a better control of the chemical and physical reactions taking place in the blend.The proposed approach has the potential to cope with the increase in construction waste while reducing the consumption of petroleum products in asphalt construction and increase resource efficiency. Educational activities will seek to promote the understanding of sustainability concepts among undergraduate and high school students and to engage students from underrepresented groups into laboratory activities by offering two summer internships for a student from Southern University, a historically black institution, and for one female engineering student from LSU. Proposed educational activities will also establish a partnership between LSU, the flagship institution for the state, and Southern University and high schools predominantly serving underrepresented groups.

本项目的目的是检验屋顶瓦废料可通过湿法工艺与沥青粘合剂混合的假设，在湿法工艺中，在与骨料混合之前，在高温下将磨碎的回收材料与粘合剂混合。 这项研究的结果可能会彻底改变回收实践中的沥青瓦在路面建设中，通过验证一种新的方法，将废弃的沥青瓦到沥青路面建设。 在将沥青结合料加入到批料中之前，干混破碎的沥青瓦（RAS）与集料的当前实践经常受到批评，这是由于在沥青瓦的沥青含量中观察到的大的可变性。 建议的湿法工艺可能会增加混合物中使用的沥青瓦的百分比，并可能允许更好地控制混合物中发生的化学和物理反应。建议的方法有可能科普建筑垃圾的增加，同时减少沥青施工中石油产品的消耗，提高资源效率。 教育活动将寻求促进本科生和高中生对可持续性概念的理解，并通过为南方大学（一个历史悠久的黑人机构）的一名学生和路易斯安那州立大学的一名女工程学生提供两个暑期实习机会，使代表性不足的群体的学生参与实验室活动。 拟议的教育活动还将在路易斯安那州立大学（该州的旗舰机构）与南方大学和主要为代表性不足的群体服务的高中之间建立伙伴关系。