Microwave Spectroscopy for the Analysis of Absorption Properties of Treated Waste Rubber Aggregates
Publication: Journal of Hazardous, Toxic, and Radioactive Waste
Volume 16, Issue 4
Abstract
This paper discusses for the first time the use of noninvasive and nondestructive microwave spectroscopy to analyze the effect of chemical treatment on the absorption properties of waste rubber aggregate material when it is reacted and heated with bitumen. Oxidation and cross-linking was used to treat the waste rubber aggregates. The surface properties of oxidized rubber were analyzed using scanning electron microscopy. The bitumen samples obtained from treated and untreated rubber-bitumen blends were analyzed using microwave spectroscopy. This technique was to measure instantaneously the reduction in absorption properties of rubber when it is reacted with bitumen after treatment, compared with the bitumen samples obtained from untreated rubber-bitumen blends before treatment. The results of the scanning electron microscopy analysis show that the surface properties of waste rubber have been changed, developing surface roughness after the oxidation process. This was consistent with the microwave spectroscopy results in which the chemical treatment successfully reduced the absorption of light fractions from bitumen to rubber. Thus, residual bitumen from treated rubber-bitumen blends is comparable with the pure bitumen in its behavior and operation. This finding will have a huge impact on industry for real-time measurement.
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Acknowledgments
The authors would like to acknowledge the financial support provided by QNRF (Qatar National Research Fund) for the project, the technical support by Paul Gibbons and Dr. Alex Mason from LJMU, and the material suppliers including Nynas UK AB and J Allcock rubber recycling UK for the materials used in the project.
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Information & Authors
Information
Published In
Journal of Hazardous, Toxic, and Radioactive Waste
Volume 16 • Issue 4 • October 2012
Pages: 334 - 342
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Aug 15, 2011
Accepted: Jan 13, 2012
Published online: Jan 16, 2012
Published in print: Oct 1, 2012
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