Improvement of long-term performance of low volume road using hydraulic road binders

加拿大的公路网由大约104万公里的铺面和未铺面道路组成。在这80万公里中，75%是每天服务车辆不到1000辆的低交通量道路。低交通量道路主要面向农村道路系统，对加拿大的社会和经济发展非常重要。路面工程师面临的主要挑战之一是开发一种具有良好长期性能的低成本路面结构，该项目的主要目标是通过解决加拿大环境下的长期性能问题，找到创新、可持续和成本效益高的低成本路面初期建设和维护解决方案。研发工作将集中在使用液压道路粘结剂(路基稳定和全深度填海)建造LVR的两项主要技术上。这些技术允许使用现有的就地材料(土壤和损坏的路面)和回收材料，从而最大限度地减少对不可再生骨料资源的使用。该系统也是一种可持续的做法，因为它增加了颗粒层的强度，允许在同等的路面设计中使用更薄的路面结构。在这些技术中使用的这些类型的粘结剂将大大节省材料成本，并显著减少二氧化碳排放和减少原材料的使用。科学进步将帮助道路工程师和设计师在道路建设中使用HRBS，并使他们意识到更环保的替代方案和更便宜的道路建设解决方案。降低成本将有利于纳税人和市政当局，更长的道路和减少使用不可再生资源的环境影响将对整个社会产生积极的影响。

The Canadian road network consists approximately 1.04 million km of paved and unpaved roads. Among these 800,000 km, or 75% are low-volume roads servicing less than 1,000 vehicles/day. Low-volume roads (LVR) are mainly oriented toward rural road systems and are very important for social and economic development in Canada. One of the key challenges of the pavement engineers is developing a cost effective pavement structure with good long-term performance of the LVRs.The main objective of this project is to find innovative, sustainable and cost effective initial construction and maintenance solutions for LVRs by addressing long-term performance under Canadian environment. The R&D work will focus on two main techniques to build LVRs using Hydraulic Road Binders (Subgrade Stabilization and Full Depth Reclamation). These techniques allow using existing in-place materials (soils and damaged pavements) and recycled materials, which minimizes the use of non-renewable aggregate resources. This system is also a sustainable practice as it increases the strength of the granular layer allowing for a thinner pavement structure for an equivalent pavement design. These types of binders used in these techniques would then allow important savings in the material cost, as well as, a significant reduction of CO2 emissions and decrease in the use of raw materials.The scientific advances will assist road engineers and designers in the use of HRBs in road construction and make them aware of greener alternatives and less expensive solutions to road construction. The cost reduction will be beneficial for tax payers and municipalities and the environmental impact of longer lasting roads and reduction in the use of non-renewable resources will be positive for the society in general.