Abstract
Frost heave in an on-going problem affecting the integrity of road pavements in cold regions. The problem is caused by ice lens growth within a frost susceptible sub-base soil resulting in the soil deformation leading to "jacking up" of the pavements and subsequent loss of the bearing strength of the bus-base upon melting of the ice. An effective insulated pavement structure was developed and implemented for Alberta municipalities utilizing kiln manufactured lightweight aggregate to form an insulating layer under road pavements in frost susceptible soil conditions. (A)