Direct shear response of gravel-glass-rubber mixtures
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This paper reports on preliminary results of a feasibility study aimed at evaluating the potential use of recycled crushed green glass bottles and recycled granulated tire rubber mixed with gravel. Specifically, dry specimens of selected gravel-glass-rubber mixtures (GGRMs) are tested using a medium-size (100 mm × 100 mm × 53 mm - width × length × height) direct shear apparatus under three normal stress levels: 30, 60 and 100 kPa. The effect of glass and rubber content by volume on the peak shear strength, friction angle and energy absorption of the mixtures is investigated. It is shown that GGRMs having 40% rubber content by volume possess adequate strength (i.e., friction angle > 30o), reduced compressibility and excellent energy absorption properties, making such materials suitable structural fills for typical geotechnical applications.
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40 - Engineering::4011 - Environmental engineering::401106 - Waste management, reduction, reuse and recycling