Tara L. Cavalline, Brett Q. Tempest, Edward H. Blanchard; Clayton D. Medlin, Rohit R. Chimmula, Clark S. Morrison
North Carolina DOT
Admixtures, Concrete pavements, fine aggregates, Mechanistic-empirical pavement design, Pavement performance, Rigid pavements, Sustainable development, Thermal properties
A catalog of locally appropriate Mechanistic-Empirical Pavement Design Guide (M-EPDG) inputs was developed for North Carolina Department of Transportation (NCDOT) rigid pavements using 18 concrete mixtures produced with two ordinary portland cements (OPCs), portland limestone cement (PLC), two fly ashes, and local aggregates. Equivalent mechanical and thermal performance was found between mixtures using OPC and PLC, supporting use of these sustainable cements. Tests for coefficient of thermal expansion (CTE), thermal conductivity, and heat capacity revealed default values are very conservative for North Carolina use. Varying coarse aggregate type did not greatly influence performance. However, fine aggregate type (manufactured or natural sand) significantly influenced concrete thermal properties.