ABSTRACT
Material characterization and design of pavement structures with Bitumen Stabilized Material (BSM) within the context of cold in-place recycling are challenging. Diverse opinion exists related to the mechanical behavior of BSM. Few investigators have characterized BSM as granular and measured the confinement pressure dependent resilient modulus, whereas few others have characterized this material as bituminous and measured the frequency dependent dynamic modulus. It is interesting to note that BSM can exhibit both these responses depending on the mode of testing and the environmental conditions.
In this investigation, the BSM sample was subjected to resilient modulus test and dynamic modulus test at room temperature. When compared with a regular base course granular material, considerable disparity existed. The resilient modulus of BSM was found to decrease during the sequences where confinement was increased. During dynamic modulus testing, BSM exhibited similar frequency dependent characteristics when compared to a standard dense graded bituminous mixture.
