Effect of warm mix additives on asphalt cement, asphalt rubber and asphalt mixture quality and durability

温拌添加剂对沥青水泥、沥青橡胶及沥青混合料质量和耐久性的影响

• 批准号: 434768-2012
• 负责人: Hesp, Simon
• 金额: $ 5.25万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=498744
• 关键词: Effect; warm; mix; additives; asphalt

The proposed research is to investigate the effect of warm mix asphalt technologies on asphalt quality and durability. Over the past decade, the Ontario Ministry of Transportation (MTO) has embarked on several programs that improve sustainability. The recent introduction of warm mix asphalt facilitates compaction at much reduced temperatures (30C-50C). Last year MTO placed 220,000 tonnes of warm mix and this amount is expected to increase significantly in years to come. The use of asphalt rubber allows for the recycling of large quantities of rubber tires and has the potential to significantly improve lifecycle costs. In support, MTO has constructed numerous trials using crumb rubber modifier. The Ontario Tire Stewardship (OTS) and MTO are now committed to the construction of three warm mix asphalt rubber trials in 2013. The lower temperatures facilitated by warm mixes provide several advantages that are particularly desirable for asphalt rubber: reduced emissions, reduced energy costs, facilitation of longer haul distances, and late season paving. However, there is a dearth of studies that specifically assess the effect such additives have on quality and durability. We define quality as the ability of an asphalt cement to resist rutting, fatigue, thermal cracking, and moisture damage. Durability is defined as the ability to maintain desired properties over a long service life. We hypothesize that there will be pronounced quality and durability differences for the various additives (warm mix and rubber) that have yet to be recognized by users and producers alike. Cold temperatures in much of Canada could produce unwanted early distress resulting in future costs, making the continued use of potentially beneficial concepts in cold climate paving unsustainable. The research results will help the asphalt industry with the selection of warm mix and asphalt rubber technologies that provide the greatest benefit in terms of long term cost and risk control. The project will train a number of graduate and undergraduate students in the latest aspects of asphalt science and engineering. The findings related to the interaction of warm mix additives with the asphalt cement could also have potential applications in other areas such as petroleum processing.

拟议的研究是研究温暖混合沥青技术对沥青质量和耐用性的影响。在过去的十年中，安大略省运输部（MTO）启动了一些改善可持续性的计划。最近引入温暖的混合物沥青在温度降低（30C-50C）下有助于压实。去年，MTO放置了220,000吨温暖的混合物，预计未来几年的这一数量将大大增加。沥青橡胶的使用允许回收大量橡胶轮胎，并有可能显着提高生命周期成本。为了支持，MTO使用Crumb橡胶修饰符构建了许多试验。安大略轮胎管理（OTS）和MTO现在致力于在2013年建造三种温暖的沥青橡胶试验。温暖混合物促进的较低温度为沥青橡胶尤为需要的几个优势：减少的排放，减少的能源成本，降低的能源成本，促进Haul Distances sileser sileser sileser silesel sileser selesh sileser和peash predances selleshance selesh selesh selesh selleshance selleshance selesh perspaving和paving。但是，缺乏研究，专门评估了这些添加剂对质量和耐用性的影响。我们将质量定义为沥青水泥抵抗车辙，疲劳，热裂和水分损伤的能力。耐用性被定义为在长期使用寿命中维持所需属性的能力。我们假设，各种添加剂（温暖混合物和橡胶）将存在明显的质量和耐用性差异，这些添加剂尚未得到用户和生产商的认可。加拿大大部分地区的寒冷温度可能会导致不必要的早期困扰，从而导致未来的成本，从而在寒冷的气候铺路中继续使用潜在的有益概念。研究结果将帮助沥青行业选择温暖的混合和沥青橡胶技术，这些技术在长期成本和风险控制方面提供了最大的好处。该项目将在沥青科学和工程学的最新方面培训许多研究生和本科生。与温暖混合添加剂与沥青水泥的相互作用有关的发现也可能在其他领域（例如石油加工）中使用。