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Effect of recycled cement concrete content on rutting behavior of asphalt concrete
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Date
2008
Author
Gul , Waqar Ahmed
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Disposed waste materials remained from demolished buildings have been an environmental problem especially for developing countries. Recycled Cement Concrete (RCC) is one of the abundant components of waste materials that include quality aggregates. Use of RCC in asphalt concrete pavements is economically a feasible option as it not only helps in recycling waste materials but also preserves natural resources by fulfilling the demand for quality aggregate in pavement constructions. However, due to variability in RCC characteristics, a detailed evaluation of its effect on asphalt concrete performance is required. In this study, effect of RCC content on rutting potential of asphalt concrete is investigated using laboratory prepared specimens. Rutting susceptibility of the specimens is determined using repeated creep tests performed in the uniaxial stress mode. Because of the aspect ratio requirements for the repeated creep test, the standard Marshall mix design procedures were modified based on the energy concept by changing the compactor device and the applied design number of blows. The modified specimens were tested to determine a number of parameters that can describe the rutting behavior of the tested mixes. The findings indicate that slope constant and flow number give relatively stronger relationships with rutting behavior as compared to the other rutting parameters. While increasing the RCC content yields improved rutting performance for coarse graded specimens, it dramatically reduces the performance for fine graded specimens.
Subject Keywords
Pavements, Asphalt.
,
Civil engineering.
URI
http://etd.lib.metu.edu.tr/upload/12609765/index.pdf
https://hdl.handle.net/11511/17731
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Graduate School of Natural and Applied Sciences, Thesis
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W. A. Gul, “Effect of recycled cement concrete content on rutting behavior of asphalt concrete,” M.S. - Master of Science, Middle East Technical University, 2008.