Behaviour of a capping layer reinforced with recycled tyres. Issue 3 (31st January 2019)

• Record Type: Journal Article
• Authors: Sun, Qideng; Indraratna, Buddhima; Heitor, Ana
• Is Part Of: Proceedings of the Institution of Civil Engineers. Volume 172:Issue 3(2019:Aug.)
• Page Start: 127
• Page End: 137
• Publication Date: 2019-01-31
• Subjects: railway tracks -- recycling & reuse of materials -- soil-geosynthetic interaction; Soil stabilization -- Periodicals; Geotechnical engineering -- Periodicals; Grouting (Soil stabilization) -- Periodicals; 624.1513605
• DOI: 10.1680/jgrim.18.00030
• Languages: English
• ISSNs: 1755-0750

Abstract

Abstract : In this paper, a sustainable approach for reducing lateral displacement in a track by increasing the confining pressure in the track substructure is demonstrated by placing a cellular rubber (tyre) membrane infilled with crushed ballast, as an alternative to a traditional capping layer of compacted granulates. Plate-load tests on a single tyre filled with gravel and subjected to a vertical load were carried out to investigate the interaction between tyre and gravel. A track model with tyre reinforcement was created to evaluate the performance of a tyre-reinforced capping layer under cyclic loading, and a numerical model was developed to determine the benefit that tyres would provide to railway substructure, especially when spent ballast is recycled as capping layer materials.