Description
The mix design procedure specified by Texas Department of Transportation for hot mix asphalt concrete mix consisting of crumb rubber (CRM-HMAC) is cumbersome and requires preparing a large number of laboratory specimens to carry out an appropriate mix design. In addition, TxDOT specifies Static Creep Test and Hamburg Wheel Tracking Device test to evaluate performance of CRM-HMAC. However, different compaction devices are used to prepare specimens for the two tests. Therefore, it is quite possible that the specimens prepared
with two devices may exhibit different performance. Thus purpose of this research project was to identify the problems with and provide solutions to the current procedure and to identify the influence of compaction devices. The evaluation results are presented in this paper.
