Determining quantity of recycled asphalt pavement (RAP) in hot mix asphalt (HMA)

热拌沥青（HMA）中再生沥青路面（RAP）用量的测定

• 批准号: 441670-2012
• 负责人: Tighe, Susan
• 金额: $ 3.36万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=534050
• 关键词: Determining; quantity; recycled; asphalt; pavement

Recycled Asphalt Pavement (RAP) has many benefits including: saves on dwindling aggregate resources, recovers non-renewable petrochemical resources, diverts large volumes of materials from overloaded landfills, reduces road building costs and contributes significantly to provincial and municipal recycling obligations. Several challenges can occur with introducing the RAP into HMA. The source of RAP can have an effect on the performance of the mix such as pavements that were extensively damaged before being removed often contain binders which have experienced more aging than a pavement in better condition. The primary concern with increasing RAP percentages into HMA mixes are its effect on moisture susceptibility of the mix and endurance against fatigue and thermal cracking. The common question that many agencies have within the pavement industry is whether RAP acts as a "black rock" or the aged Asphalt Cement in RAP blends with the new Asphalt Cement in the mix.

再生沥青路面（RAP）具有许多优点，包括：节省日益减少的骨料资源，回收不可再生的石化资源，从超载的垃圾填埋场转移大量材料，降低道路建设成本，并为省和市的回收义务做出重大贡献。将RAP引入HMA可能会出现一些挑战。RAP的来源可能对混合物的性能产生影响，例如在被移除之前被广泛损坏的路面通常含有比状况更好的路面经历更多老化的粘合剂。增加RAP在HMA混合料中的百分比的主要关注点是其对混合料的湿度敏感性以及对疲劳和热开裂的耐久性的影响。路面行业内许多机构的共同问题是RAP是否充当“黑色岩石”或RAP中的老化沥青水泥与混合物中的新沥青水泥混合。