Browsing by Subject "Waste tires"
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Item Gravity and mechanically stabilized earth walls using whole scrap tires(Texas Tech University, 2000-05) Retterer, Taya AnnAs more and more vehicles enter today's highways there is a greater and greater need to find uses for the scrap tires produced by these automobiles. There is no longer enough space to stockpile them and the hazards of stockpiling are too great. This problem has caused a need to find ways to recycle or reuse scrap tires. Some of these methods are tire pyrolysis, tire derived fuel, and retreading. In the field of civil engineering tires have been used to build marine reefs, protect shorelines, as a lightweight fill material, highway crash barriers and in bituminous pavements. The focus of this paper is on the use of scrap tires in the area of retaining walls and erosion control structures. Three retaining walls that have been built by tires are presented. Mechanically stabilized earth and gravity walls were chosen to be investigated further. Design methods were determined for these wall types. Once design parameters, such as wall heights and soil parameters, were set, the methods where used to create a series of design charts. These charts give the designs for a variety of walls. They cover walls of different heights, configurations, and batters. Construction details are given in order to assure the integrity of the walls. Conclusions looked at economic aspects, constructability issues, and the high volume use of tires. Some final recommendations included the building of a test wall, completing a life cycle cost analysis, and the compiling of an environmental impact statement.Item Use of tire bales in building earth retaining walls: stability analysis and construction guidelines(Texas Tech University, 2000-12) Hossain, Mohammad SadiqueIn the United States, about 270 million automobile and truck tires are sold each year, with most of those tires eventually making a trip to the landfill, adding to the existing inventory of about 400 million. This thesis presentation focuses on the possible use of tire bales for building retaining walls. Tire bales are scrap tires compressed to a reduced volume. Two types of tire bales that have been used for different purposes were identified in the literature review. They are Eco-Bloc and En-Core Tire Bales. The tire bales can be used for building mechanically stabilized earth and gravity retaining walls. Detailed stability analysis and design was done for these two types of retaining walls. The stability analyses investigated both external and internal failure modes. Repeated analysis was done for different site and loading conditions, different wall configurations and different soil parameters. After all the design combinations were put into design, the designs were combined to form design charts. These charts may be used in projects that match the site and loading descriptions provided in the charts. Some construction guidelines are provided to assist in constructing the retaining walls. It is recommended that full-scale test walls of both mechanically stabilized and gravity retaining wall be testbuilt before their commercial use. The fiill-scale tests should enable the constructability review, economic analysis and environmental impact analysis to be done.