Jadidi Kazem, Esmaeili Morteza, Kalantari Mehdi, Khalili Mehdi, Karakouzian Moses
Howard R. Hughes College of Engineering, University of Nevada Las Vegas, Las Vegas, NV 89154, USA.
School of Railway Engineering, Iran University of Science and Technology, Tehran 13114-16846, Iran.
Materials (Basel). 2020 Dec 31;14(1):169. doi: 10.3390/ma14010169.
Asphalt is a common material that is used extensively for roadways. Furthermore, bituminous mixes have been used in railways, both as asphalt and as mortar. Different agencies and research institutes have investigated and suggested various applications. These studies indicate the benefits of bituminous material under railways, such as improving a substructure's stiffness and bearing capacity; enhancing its dynamic characteristics and response, especially under high-speed train loads; waterproofing the subgrade; protecting the top layers against fine contamination. These potential applications can improve the overall track structure performance and lead to minimizing settlement under heavy loads. They can also guarantee an appropriate response under high-speed loads, especially in comparison to a rigid slab track. This review paper documents the literature related to the utilization of asphalt and bituminous mixes in railway tracks. This paper presents a critical review of the research in the application of asphalt and bituminous mixes in railway tracks. Additionally, this paper reviews the design and construction recommendations and procedures for asphalt and bituminous mixes in railway tracks as practiced in different countries. This paper also provides case studies of projects where asphalt and bituminous mixes have been utilized in railway tracks. It is anticipated that this review paper will facilitate (1) the exchange of ideas and innovations in the area of the design and construction of railway tracks and (2) the development of unified standards for the design and construction of railway tracks with asphalt and bituminous mixtures.
沥青是一种广泛用于道路的常见材料。此外，沥青混合料已用于铁路，既用作沥青，也用作砂浆。不同的机构和研究机构已经进行了调查并提出了各种应用。这些研究表明了铁路下方沥青材料的益处，例如提高下部结构的刚度和承载能力；增强其动态特性和响应，特别是在高速列车荷载作用下；对路基进行防水处理；保护顶层免受细颗粒污染。这些潜在应用可以改善轨道结构的整体性能，并使重载下的沉降最小化。它们还可以确保在高速荷载下有适当的响应，特别是与刚性板式轨道相比。这篇综述文章记录了与铁路轨道中沥青和沥青混合料利用相关的文献。本文对沥青和沥青混合料在铁路轨道应用方面的研究进行了批判性综述。此外，本文还回顾了不同国家在铁路轨道中沥青和沥青混合料的设计和施工建议及程序。本文还提供了在铁路轨道中使用沥青和沥青混合料的项目案例研究。预计这篇综述文章将促进（1）铁路轨道设计和施工领域的思想和创新交流，以及（2）制定使用沥青和沥青混合料的铁路轨道设计和施工统一标准。
