Shear strength behaviour of tire derived aggregate - lateritic soil mixtures

Yuri D. Costa, Karísia B. Franco, Olavo F. Santos Jr., Carina L. Costa

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Embankments and Dams

ABSTRACT: Use of tire derived aggregate (TDA) soil mixtures in embankment construction is becoming an accepted technique among the alternative technologies for environmentally correct disposal of scrap tires. Applications of TDA in tropical soils require knowledge on the mechanical response of the resulting mixtures. In this paper, an experimental testing program was carried out using a direct shear apparatus in order to examine the shear strength behaviour of mixtures of TDA (tire buffings) and a lateritic soil. For the range of confinement levels considered in this study, TDA was found to considerably increase the shear strength of the mixture. The reinforcement provided by the TDA in the soil is maximum for a TDA content of 40% by weight. The contribution of the TDA to reinforcement mechanisms was comparatively less significant at low strains.

RESUMEN: El uso de mezclas de agregados derivados de neumáticos y suelo para la construcción de rellenos se está convirtiendo en una práctica común entre las alternativas tecnológicas para la eliminación correcta de los neumáticos de desecho. Aplicaciones de agregados de neumáticos en los suelos tropicales necesitan de conocimientos previos sobre la respuesta mecánica de la mezcla resultante. En este trabajo, un programa experimental fue desarrollado a través de ensayos de corte directo a fin de examinar la resistencia al corte de las mezclas de agregados de neumáticos y un suelo laterítico. Para los niveles de confinamiento utilizados, se encontró que el agregado de neumáticos aumenta considerablemente la resistencia al corte de la mezcla. El refuerzo proporcionado por la adición de neumáticos es máximo para un contenido de neumáticos de 40% en peso. La contribución del agregado de neumático como refuerzo para la mezcla fue menos importante en bajas deformaciones.

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Cite this article:
Yuri D. Costa; Karísia B. Franco; Olavo F. Santos Jr.; Carina L. Costa (2011) Shear strength behaviour of tire derived aggregate - lateritic soil mixtures in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO11Paper692,author = Yuri D. Costa; Karísia B. Franco; Olavo F. Santos Jr.; Carina L. Costa ,title = Shear strength behaviour of tire derived aggregate - lateritic soil mixtures,year = 2011}