Abstract
This research investigated the suitability of Crumb Rubber (CR) as an alternative binder to supplement bitumen. The emerging trends in the world has challenged researchers to seek means of converting waste to wealth partly because of the environmental concerns they pose and partly because there is a general dearth of raw materials as the stock of the existing ones are fast depleting. In this research, the traditional Marshall Test method was arbitrary used to test 20%, 40%, and 60% CR proportions replacement of bitumen against the control (0% CR). The results were assessed based on the provisions of Asphalt Institute Marshall Criteria to determine the conformity with engineering properties-Stability, Flow, and Void analysis. The results indicated that 40% CR content resulting in Stability - 11.0KN, Flow - 4.3mm and VIM-14.45% trailed those with content 0% CR, but adequate in engineering properties to replace bitumen in asphalt mix. The results meet the criteria of medium class traffic specified by Asphalt Institute (1979).
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