Improving Sustainability and Durability of Pavement Structures in Cold Regions

提高寒冷地区路面结构的可持续性和耐久性

• 批准号: RGPIN-2020-06340
• 负责人: Soliman, Haithem
• 金额: $ 1.89万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749532
• 关键词: Improving; Sustainability; Durability; Pavement; Structures

The need to construct and maintain large road networks with limited resources and under extreme temperatures is a challenge to Canadian transportation agencies, especially in the prairie region. Expansive soils and depletion of high quality aggregates are additional challenges to constructing low-maintenance pavement structures. Soil/aggregate stabilization techniques can be used to increase stability and stiffness of expansive soil and poor aggregates. However, durability of stabilized soil/aggregate layers is a concern in cold climates. The large uncertainty associated with the long-term performance of stabilized layers is a limitation to their use in cold regions. In addition to the above challenges, management of plastic waste has been an environmental challenge for municipalities because it does not degrade with time. While plastic waste can be diverted from landfills through recycling, some plastic waste materials cannot be recycled in domestically used products. To address this problem, several studies have investigated the use of plastic waste in production of asphalt mixtures. While it has shown some promise, only a limited number of studies have investigated the performance of asphalt mixtures containing plastic waste in cold regions. The long-term objective of this research program is to identify economic and sustainable solutions for pavement design and construction in cold climates. This long-term objective can be achieved by reducing uncertainty associated with innovative construction techniques, optimizing the use of limited resources, and using recycled materials in pavement construction. The specific short-term objectives of the proposed research program are as follows: a. Evaluate the suitability of different stabilization techniques for the available soils, aggregate materials, and climatic conditions in the study region. b. Characterize the durability and long-term performance of stabilized soil and aggregate layers using performance-based accelerated laboratory testing. c. Investigate the feasibility of using plastic waste in asphalt concrete mixtures in cold regions. d. Utilize imaging techniques to characterize the properties and freeze-thaw durability of asphalt concrete mixtures containing plastic waste. e. Provide guidelines for using plastic waste in asphalt mixtures and stabilization of soil and aggregate layers in cold regions based on the findings of this research program. f. Improve knowledge and skills of students related to advanced testing of pavement materials and design methods for pavement structures. The research program will have a significant impact on improving the sustainability and durability of pavement structures in cold regions. As a result, transportation agencies and municipalities will optimize the utilization of limited budgets, which is a challenge for agencies in cold regions and Canadian Prairies, and reduce the carbon footprint of pavement construction.

对于加拿大运输机构，尤其是在大草原地区，建造和维护具有有限资源的大型道路网络的需求是一个挑战。膨胀的土壤和高质量聚集体的耗竭是建造低维护的路面结构的其他挑战。土壤/骨料稳定技术可用于提高膨胀土壤和骨料差的稳定性和僵硬。但是，稳定的土壤/骨料层的耐用性是寒冷气候的关注点。与稳定层的长期性能相关的巨大不确定性是它们在寒冷地区使用的限制。除上述挑战外，塑料废物的管理一直是市政当局的环境挑战，因为它不会随着时间的推移而降级。虽然可以通过回收利用塑料废物从垃圾填埋场转移，但某些塑料废料不能在国内使用的产品中回收。为了解决这个问题，一些研究研究了塑料废物在沥青混合物的生产中的使用。尽管它表现出了一些希望，但只有有限的研究研究了寒冷地区含有塑料废物的沥青混合物的性能。该研究计划的长期目标是在寒冷的气候下确定路面设计和建设的经济和可持续解决方案。可以通过减少与创新施工技术相关的不确定性，优化有限资源的使用以及在路面构造中使用再生材料来实现这一长期目标。拟议的研究计划的特定短期目标如下：评估研究区域中不同稳定技术对可用土壤，骨料材料和气候条件的适用性。 b。使用基于性能的加速实验室测试来表征稳定土壤和骨料层的耐用性和长期性能。 c。研究在冷区域中沥青混凝土混合物中使用塑料废物的可行性。 d。利用成像技术来表征含有塑料废物的沥青混凝土混合物的冻结耐用性。 e。根据该研究计划的发现，提供了在沥青混合物中使用塑料废物以及在冷区域中土壤和骨料层稳定的准则。 f。改善与人行道材料的高级测试有关的学生的知识和技能，并为人行道结构设计方法。该研究计划将对改善寒冷地区路面结构的可持续性和耐用性产生重大影响。结果，运输机构和市政当局将优化预算有限的利用，这是对寒冷地区和加拿大大草原的机构的挑战，并减少了人行道建设的碳足迹。