Shear strength characteristics of sand-mixed with granular rubber |
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| Authors: | Mahmoud Ghazavi |
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| Institution: | (1) Civil Engineering Department, Isfahan University of Technology, Isfahan, Iran;(2) Present address: Faculty of Civil Engineering, K.N. Toosi University, Tehran, Iran |
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| Abstract: | Waste materials such as waste tires, rubbers, and plastic materials are normally produced in every society, entering the environment
and causing serious problems. These problems may be somehow reduced by finding applications for them in engineering, for example,
as lightweight materials for backfill in geotechnical projects. To this aim, this paper demonstrates how shear strength characteristics
of sand mixed with various percentages of waste garden hose grains are altered. A relatively, uniform sand has been mixed
with waste hose grains in loose and slightly compacted states. Waste hose grains were prepared with special popular machinery
in a local area. Various sand-rubber mixtures having 0%, 10%, 15%, 20%, 50%, 70%, and 100% waste hose particles by weight
were chosen. The rubber grains were distributed in the sand such that uniform mixtures are obtained. In order to compare the
shear strength of different sand-rubber samples, two compaction states were considered. The results show that the influencing
parameters on shear strength characteristics of sand-rubber mixtures are normal stress, mixture unit weight, and rubber content.
With the selected waste hose particles, compaction states, and rubber contents, the initial friction angle φ1 does not change significantly. However, an apparent cohesion appears in the mixtures. From environmental point of view and
due to lightweight material for the sand-waste hose particles, it may be useful to use such materials in corresponding geotechnical
projects.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | cohesion dilation environment friction angle geotechnical engineering sand-rubber mixtures shear strength waste hose grains |
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