Date Approved


Embargo Period


Document Type


Degree Name

Ph.D. Doctor of Philosophy


Civil and Environmental Engineering


Henry M. Rowan College of Engineering


Yusuf Mehta, Ph.D., P.E.

Committee Member 1

Douglas Cleary, Ph.D., P.E.

Committee Member 2

Cheng Zhu, Ph.D., P.E.

Committee Member 3

Gilson Lomboy, Ph.D., P.E.

Committee Member 4

Umashanger Thayasivam, Ph.D.


balanced mix design approach, cold-recycled mixtures, emulsion-cement paste, performance interaction charts


Pavements--Maintenance and repair; Pavements--Recycling


Civil and Environmental Engineering


The main objective of this study was to assess the performance of cold recycled mixtures (CRMs) at: (1) binder level through evaluating the rheological and mechanical properties of emulsion-cement paste (ECP), and (2) mix level through characterizing the density and performance of CRMs. The testing program for ECPs included multiple stress creep recovery (MSCR), bending beam rheometer (BBR), linear amplitude sweep (LAS), penetration test, and isothermal calorimetry. For CRMs, a balanced mix design (BMD) approach was used to develop performance interaction charts to select optimum contents of emulsion, cement, and water maximizing the resistance of CRMs to rutting and cracking. Statistical and regression analyses were then conducted to assess the significance of the impact of ECP and CRM constituents on their performance and to evaluate the correlations between ECP and CRM testing parameters. Results showed that higher emulsion and cement contents led to lower air void level of CRMs. Further, greater cement contents improved rutting performance, but decreased the cracking resistance for both ECPs and CRMs. Performance interaction charts were also developed to select optimum contents of emulsion, cement, and water. Finally, the non-recoverable creep compliance and penetration at 40oC of ECPs correlated well with CRM rutting performance, while low- and intermediate-temperature cracking.