Date of Graduation


Document Type


Degree Name

Master of Science in Civil Engineering (MSCE)

Degree Level



Civil Engineering


Andrew F. Braham

Committee Member

Kevin Hall

Second Committee Member

Rodney Williams


Social sciences, Applied sciences, Cold in-place recycling, Compactibility, Emulsified asphalt


Cold in-place recycling (CIR) is a process that takes three to four inches of existing pavement surface and reuses 100% of it by milling and crushing it, adding asphalt emulsions and/or additives to it, before placing and re-compacting it. There is currently very little research regarding the interaction between the crushed aggregate and asphalt emulsion during the CIR process. In this study, the interactions between the combinations of crushed aggregates and asphalt emulsions were investigated along with select compaction metrics and a raveling performance test. The three types of aggregates included coated limestone, recycled asphalt pavement (RAP), and coated syenite. The two types of emulsifiers included a commodity and a proprietary one. The compaction metrics explored the compaction behavior of CIR and the raveling test is a standard test that evaluates a mixture’s resistance to raveling under initial traffic. The results of this project indicated crushing aggregate and waiting between one hour to one day before mixing can be more optimal for easier compactibility than crushing and mixing immediately or waiting one week later. Not only were the results seen in the compaction metrics, but in the raveling test as well.