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Geomechanics and Engineering Volume 9, Number 4, October 2015 , pages 447-464 DOI: https://doi.org/10.12989/gae.2015.9.4.447 |
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Geotechnical properties of tire-sand mixtures as backfill material for buried pipe installations |
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Niyazi U. Terzi, C. Erenson and Murat E. Selçuk
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| Abstract | ||
| Millions of scrap tires are discarded annually in Turkey. The bulk of which are currently landfilled or stockpiled. These tires consume valuable landfill space or if improperly disposed, create a fire hazard and provide a prolific breeding ground for rats and mosquitoes. Used tires pose both a serious public and environmental health problem which means that economically feasible alternatives for scrap tire disposal must be found. Some of the current uses of scrap tires are tire-derived fuel, creating barrier reefs and as an asphalt additive in the form of crumb rubber. However, there is a much need for the development of additional uses for scrap tires. One development the creation of shreds from scrap tires that are coarse grained, free draining and have a low compacted density thus offering significant advantages for use as lightweight subgrade fill and backfill material. This paper reports a comprehensive laboratory study that was performed to evaluate the use of a shredded tire-sand mixture as a backfill material in trench conditions. A steel frame test tank with glass walls was created to replicate a classical trench section in field conditions. The results of the test demonstrated that shredded tires mixed with sand have a definite potential to be effectively used as backfill material for buried pipe installations. | ||
| Key Words | ||
| tire rubber; backfill material; HDPE flexible pipe | ||
| Address | ||
| (1) Niyazi U. Terzi, C. Erenson: Aksaray University, Engineering Faculty, Department of Civil Engineering, Geotechnics Division, Aksaray, Turkey; (2) Murat E. Selçuk; YıldızTechnical University, Civil Engineering Faculty, Department of Civil Engineering, Geotechnics Division, Istanbul, Turkey. | ||