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ENGINEERING PROPERTIES OF SHREDDED TIRES IN LIGHTWEIGHT FILL APPLICATIONS.
| 题名： | ENGINEERING PROPERTIES OF SHREDDED TIRES IN LIGHTWEIGHT FILL APPLICATIONS. |
| 作者： | Newcomb-DE; Drescher-A |
| 关键词： | SHREDDED-TIRES; ENGINEERING-PROPERTIES; LIGHTWEIGHT-MATERIALS; FILL-EMBANKMENT; FIELD-TESTS; LABORATORY-TESTS; COMPACTION-EFFORT; COMPRESSIBILITY-; GRADATION-; BULK-DENSITY; POROSITY-; VOID-RATIOS; ANISOTROPY- |
| 摘要： | It is estimated that approximately 240 million automobile and truck tires are discarded annually in the United States. Until recently, these have typically been disposed of in landfills and in tire stockpile sites where they pose potential safety and health problems as well as being unsightly. The latest use of shredded tires as lightweight fill material is encouraging, however, and the number of applications may grow provided that their engineering properties become more understandable and the quantifying parameters are known. Exploratory field and laboratory tests for determining the basic properties of shredded tires are reported in this paper. In the field tests, where large-size shreds were used, the effort necessary for compacting layers of shredded tires with a bulldozer was measured. In the laboratory tests, the compressibility of small-size shreds was investigated by means of a one-dimensional compression test. In addition, for both the large- and small-size shreds, their gradation, bulk density, porosity, and void ratio were determined. For comparison, wood chips were tested. The results show that the bulk density of shredded tires is between that of traditional granular fills and wood chips. However, their compressibility and rebound are much higher than those of the latter material, which could lead to premature fatigue failure of hard surface pavements. The apparent anisotropy of a shredded tire mass may also cause errors in predicting pavement deflections by means of classical, elastic multilayer system analysis, which assumes material isotropy. |
| 总页数： | Transportation Research Record. 1994. (1437) pp1-7 (10 Fig., 1 Tab., 8 Ref.) |
| 报告类型： | 科技报告 |
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