期刊
ACTA GEOTECHNICA
卷 17, 期 5, 页码 1847-1858出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11440-021-01342-2
关键词
Ballast breakage; Modulus degradation; Rubber intermixed ballast; Triaxial compression test
资金
- Australian Research Council Discovery Project [ARC-DP180101916]
- ARC Industry Transformation Training Centre for Advanced Rail Track Technologies (ITTC-Rail) [IC170100006]
This study focuses on the concept of using rubber granules from waste tyres as elastic aggregates blended with traditional ballast particles to improve the performance of rail tracks, forming a Rubber Intermixed Ballast System (RIBS). The research indicates that RIBS with over 10% rubber content consistently reduce dilation under changing confining pressures and effectively control ballast fouling within the granular matrix. The results also show that rubber particles ranging from 9.5 to 19 mm with similar angularity to ballast aggregates are advantageous in reducing the breakage of load-bearing larger aggregates.
This study aims to promote the concept of using rubber granules from waste tyres as elastic aggregates blended with traditional ballast particles for better performance of rail tracks, i.e. a Rubber Intermixed Ballast System (RIBS). This paper describes the mechanical and compressibility characteristics of RIBS under monotonic loads and a criterion designed to determine the optimum rubber content in the proposed RIBS. The most interesting findings of this study embrace how the rubber granules in the blended rockfill assembly significantly reduce the dilation and modulus degradation, and the breakage of ballast aggregates. RIBS with more than 10% of rubber demonstrates a seemingly consistent reduction in dilation under changing confining pressures. Increased deviator stress and larger effective confining pressure compress the rubber particles within the RIBS which may cause relatively large initial settlements in the ballast layer, if the rubber content becomes excessive. It is also evident from the results that rubber particles ranging from 9.5 to 19 mm with similar angularity to ballast aggregates is advantageous, because, they reduce the breakage of load-bearing larger aggregates, thus effectively controlling ballast fouling within the granular matrix.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据