Author
Miguel Sol-Sánchez
Bio: Miguel Sol-Sánchez is an academic researcher from University of Granada. The author has contributed to research in topics: Track (rail transport) & Asphalt. The author has an hindex of 19, co-authored 61 publications receiving 1006 citations.
Topics: Track (rail transport), Asphalt, Ballast, Crumb rubber, Natural rubber
Papers
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TL;DR: In this paper, an overview of a number of studies related to the ageing process in bitumen, to determine the main component affecting this phenomenon is provided, and a review is presented of the in-laboratory tests used to simulate the different ageing processes (short-term ageing, long-term aging, UV ageing) that occur in the field, along with a description of the techniques currently employed to analyse what happens to the binder after ageing.
192 citations
TL;DR: In this paper, the authors discuss the problems associated with track stiffness, geometry degradation, and vibrations, and at the same time, studies the characteristics of elastic elements as well as the research carried out to test and evaluate their effectiveness.
127 citations
TL;DR: In this paper, the authors focused on the use of crumb rubber (from end-of-life tires) as elastic aggregates mixed with ballast particles, which could reduce ballast degradation and consumption of natural aggregates.
106 citations
TL;DR: In this paper, the authors evaluate the mechanical and thermal properties of graphene modified asphalt binders and show that the presence of graphene produces a more elastic response in asphalt binder, but the resulting recovery capacity is not as effective as that provided by other asphalt modifiers such as elastomers.
86 citations
TL;DR: In this article, the authors focused on the improvement of the mechanical performance of high modulus asphalt mixtures through the use of additives (crumb rubber and acrylic fibers), which could increase their fatigue resistance by maintaining the stiffness required.
66 citations
Cited by
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491 citations
TL;DR: The properties of waste tyre rubber and engineering applications have been previously reported in a range of publications with respect to the environmental, economic, and technical factors as discussed by the authors, with a focus on geotechnical engineering applications, such as earthworks and infrastructure construction.
Abstract: Waste tyres and their accumulation is a global environmental concern; they are not biodegradable, and, globally, an estimated 1.5 billion are generated annually. Waste tyres in landfill and stockpiles are renowned for leaching toxic chemicals into the surrounding environment, acting as breeding grounds for mosquitoes, and fuelling inextinguishable fires. The properties of waste tyre rubber and engineering applications have been previously reported in a range of publications with respect to the environmental, economic, and technical factors. This study compiles and reviews this research with a focus on geotechnical engineering applications, such as earthworks and infrastructure construction. The applications of waste rubber in construction materials includes cementitious concrete, asphalt concrete, and granular materials for earth structures. Crumb rubber, when used as a sand replacement in flowable concrete fill, improved ductility and strength-to-weight ratio. A 40 MPa concrete mix with 0.6% rubber crumb content exhibited optimal strength and air entrainment capabilities, displaying minimal damage after 56 freeze/thaw cycles. Rubber, as a partial replacement for aggregate in road base and sub-base layers, adversely affected the California Bearing Ratio (CBR) of the graded aggregate base course. Rubber-soil mixtures as the interface of foundation and structure yielded a 60–70 % reduction in vertical and horizontal ground accelerations when subjected to earthquake simulation modelling. There is concern regarding the toxicity of waste rubber incorporated products due to leachates of heavy metals and other chemicals common in tyres. Further comprehensive studies in this area are needed. Leachate studies should be conducted under different pH and liquid to solid ratios.
247 citations
TL;DR: The properties of tyre waste and their potential reuse, the enhancement of end-of-life tires and the various types of recovery, such as the reconstruction of tyres and the material recovery are considered.
212 citations
TL;DR: In this paper, an overview of a number of studies related to the ageing process in bitumen, to determine the main component affecting this phenomenon is provided, and a review is presented of the in-laboratory tests used to simulate the different ageing processes (short-term ageing, long-term aging, UV ageing) that occur in the field, along with a description of the techniques currently employed to analyse what happens to the binder after ageing.
192 citations
TL;DR: In this article, a transdisciplinary overview on changes in policy and approach to waste tyres that leads to both solving environmental problem of post-consumer tyres and creating environmentally friendlier novel materials are presented.
184 citations