Evaluation of Dry Asphalt Rubber Concrete in Railway Sub-Ballast using the Four Point Bending Test

  1. F. Martinez Soto 1
  2. G. Di Mino 2
  3. C.M. Di Liberto 2
  1. 1 Department of Civil Engineering University of Palermo, Italy
  2. 2 Department of Civil, Materials and Environmental Engineering University of Palermo, Italy
Actas:
Third International Conference on Railway Technology: Research, Development and Maintenance

Editorial: Civil-Comp Press, Stirlingshire, UK

ISSN: 1759-3433

Año de publicación: 2016

Páginas: 37

Congreso: Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance

Tipo: Aportación congreso

DOI: 10.4203/CCP.110.37 GOOGLE SCHOLAR lock_openAcceso abierto editor

Resumen

The study of bituminous mixes can be related to tyre rubber material recycling. Encouraging scrap tyre disposal and cutting down on pit employment are the environmental aims. In the field of railways, technological processes involved in the use of crumb rubber are the wet-dry processes. In the mechanical characterisation of the asphalt concrete in terms of both the fatigue resistance and the stiffness modulus it is necessary to use a design method for the sub-ballast railway material, even more so if the asphalt concrete investigated is an innovative material such as a dry asphalt rubber concrete (DARC) (i.e. a bituminous mixture with crumb rubber formed by a dry process). Such material is less known and investigated than the wet process, even if its application implies peculiar economic and environmental advantages such as no specialized equipment or significant plant modifications and a large quantity of recycled waste tires compared to the wet process. Different kinds of test are usually used in the experimental work such as bending tests or uni-axial tests, but they do not give the same answer.

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