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Studying the Effect of Crumb Rubber Inclusion in the Mix Design Properties of HMA Pavement: A Case Study of Light Traffic

C Nwaobakata, Solomon Ndubuisi Eluozo

Abstract


Improving the performance of flexible road pavement has been one of the major concerns in highway engineering; these are due to the twin problems of temperature and oxidation that were observed to impede its performance during use. One the fundamental aim of this study is to explore the techniques of crumb rubber inclusion (in 0%, 5%, 10%, 15%, 20% and 25%), these severs as modifier to the mix design properties of the asphalt concrete on a case study of light traffic. Laboratory test through performing experiments of asphalt composition were carried out, this was to determine the mix design properties of crumb rubber modified asphalt as compared with the unmodified asphalt concrete at optimum asphalt content. These are on the assumption that traffic loads were the only contributor to pavement damage, loading frequency of 0.1 to 1.0 Hz was applied and the dynamic module were derived. From the research findings, it was observed that there was a reduction in the tensile strain on the asphalt concrete and stiffness increased linearly with rising shredded tyre chip content, these results express an improvement of pavement life applying these materials.

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References


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DOI: https://doi.org/10.37628/jtets.v4i1.359

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